{"id":55393,"date":"2026-06-07T16:55:56","date_gmt":"2026-06-07T16:55:56","guid":{"rendered":"https:\/\/xtmim.com\/?page_id=55393"},"modified":"2026-06-07T16:55:59","modified_gmt":"2026-06-07T16:55:59","slug":"sintering-shrinkage","status":"publish","type":"page","link":"https:\/\/xtmim.com\/ar\/mim-process\/sintering\/sintering-shrinkage\/","title":{"rendered":"\u0627\u0646\u0643\u0645\u0627\u0634 \u062a\u0644\u0628\u064a\u062f MIM"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"55393\" class=\"elementor elementor-55393\" data-elementor-post-type=\"page\">\n\t\t\t\t<div class=\"elementor-element elementor-element-5c957ed e-con-full e-flex cmsmasters-bg-hide-none cmsmasters-bg-hide-none cmsmasters-block-default e-con e-parent\" data-id=\"5c957ed\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t<div class=\"elementor-element elementor-element-7a923a6 e-flex e-con-boxed cmsmasters-block-default e-con e-child\" data-id=\"7a923a6\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-2766aa6 cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-heading\" data-id=\"2766aa6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">MIM Sintering Shrinkage and Dimensional Control<\/h1>\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-7747c13 e-con-full e-flex cmsmasters-block-default e-con e-parent\" data-id=\"7747c13\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-082b966 e-flex e-con-boxed cmsmasters-block-default e-con e-child\" data-id=\"082b966\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-4e18f86 cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-html\" data-id=\"4e18f86\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t\t<style>\r\n.xtmim-shrinkage-page {\r\n  --xt-primary: #1d5f96;\r\n  --xt-primary-dark: #174d78;\r\n  --xt-primary-soft: #eaf3fb;\r\n  --xt-bg: #ffffff;\r\n  --xt-bg-soft: #f5f7fa;\r\n  --xt-border: #dfe5ec;\r\n  --xt-text: #243142;\r\n  --xt-muted: #5d6b7a;\r\n  --xt-success-soft: #edf7f1;\r\n  --xt-warning-soft: #fff7e6;\r\n  --xt-radius-sm: 10px;\r\n  --xt-radius-md: 16px;\r\n  --xt-radius-lg: 22px;\r\n  --xt-shadow-sm: 0 10px 28px rgba(30, 48, 73, 0.06);\r\n  --xt-shadow-md: 0 14px 36px rgba(30, 48, 73, 0.09);\r\n  --xt-container: 1600px;\r\n  --xt-font-base: 16px;\r\n\r\n  box-sizing: border-box;\r\n  max-width: 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.xtmim-small-note {\r\n  color: var(--xt-muted);\r\n  font-size: 15px;\r\n}\r\n\r\n@media (max-width: 900px) {\r\n  .xtmim-shrinkage-page {\r\n    padding: 0 16px 48px;\r\n    font-size: 16px;\r\n  }\r\n\r\n  .xtmim-shrinkage-page h2 {\r\n    font-size: 26px;\r\n  }\r\n\r\n  .xtmim-shrinkage-page h3 {\r\n    font-size: 20px;\r\n  }\r\n\r\n  .xtmim-shrinkage-page .xtmim-section,\r\n  .xtmim-shrinkage-page .xtmim-cta {\r\n    padding: 22px 18px;\r\n    border-radius: 18px;\r\n  }\r\n\r\n  .xtmim-shrinkage-page .xtmim-toc-grid,\r\n  .xtmim-shrinkage-page .xtmim-grid-2,\r\n  .xtmim-shrinkage-page .xtmim-checklist {\r\n    grid-template-columns: 1fr;\r\n  }\r\n\r\n  .xtmim-shrinkage-page .xtmim-lead {\r\n    font-size: 16.5px;\r\n  }\r\n\r\n  .xtmim-shrinkage-page .xtmim-btn {\r\n    width: 100%;\r\n    text-align: center;\r\n  }\r\n}\r\n\r\n@media (max-width: 600px) {\r\n  .xtmim-shrinkage-page {\r\n    padding-left: 16px;\r\n    padding-right: 16px;\r\n  }\r\n\r\n  .xtmim-shrinkage-page h2 {\r\n    font-size: 25px;\r\n  }\r\n\r\n  .xtmim-shrinkage-page h3 {\r\n    font-size: 20px;\r\n  }\r\n\r\n  .xtmim-shrinkage-page .xtmim-toc,\r\n  .xtmim-shrinkage-page .xtmim-section,\r\n  .xtmim-shrinkage-page .xtmim-cta,\r\n  .xtmim-shrinkage-page .xtmim-author,\r\n  .xtmim-shrinkage-page .xtmim-standards {\r\n    padding: 20px 16px;\r\n  }\r\n\r\n  .xtmim-shrinkage-page .xtmim-table th,\r\n  .xtmim-shrinkage-page .xtmim-table td {\r\n    padding: 12px 14px;\r\n  }\r\n\r\n  .xtmim-shrinkage-page .xtmim-figure figcaption {\r\n    padding: 13px 15px 0;\r\n  }\r\n\r\n  .xtmim-shrinkage-page .xtmim-figure-note {\r\n    padding: 8px 15px 16px;\r\n  }\r\n}\r\n<\/style>\r\n\r\n<article class=\"xtmim-shrinkage-page\">\r\n\r\n\r\n  <section class=\"xtmim-section xtmim-section-soft\" id=\"direct-answer\">\r\n    <span class=\"xtmim-eyebrow\">MIM Process \/ Sintering \/ Dimensional Control<\/span>\r\n    <h2>Engineering Summary: What MIM Sintering Shrinkage Means for Final Dimensions<\/h2>\r\n    <p class=\"xtmim-lead\">MIM sintering shrinkage is the controlled dimensional reduction that occurs when a debound metal injection molded part densifies during sintering. For design engineers, the main issue is not whether the part will shrink; it will. The practical question is whether the shrinkage can be predicted, compensated in the mold, and kept uniform enough to meet the drawing requirements after sintering. In practice, MIM tooling is not cut directly to final part size. The mold cavity must be oversized according to expected shrinkage, material behavior, feedstock stability, part geometry, wall thickness balance, and trial validation. If shrinkage is stable, many dimensions can remain as-sintered. If the part has tight holes, uneven wall thickness, long flat areas, functional datums, or strict flatness requirements, those features should be reviewed before tooling for possible sizing, machining, support planning, or tolerance adjustment.<\/p>\r\n\r\n    <div class=\"xtmim-quick-answer\">\r\n      <p><strong>Engineering takeaway:<\/strong> shrinkage is not a defect in MIM. Poorly predicted shrinkage, non-uniform shrinkage, or using one generic shrinkage value for every feature is the real dimensional risk.<\/p>\r\n      <p><strong>This page is useful when:<\/strong><\/p>\r\n      <ul>\r\n        <li>You are preparing MIM tooling and need a shrinkage compensation review before mold manufacturing.<\/li>\r\n        <li>Your part has tight holes, assembly datums, flatness requirements, thin-to-thick transitions, or long unsupported features.<\/li>\r\n        <li>You need to decide which dimensions may remain as-sintered and which may require sizing, machining, support planning, or tolerance adjustment.<\/li>\r\n      <\/ul>\r\n      <p class=\"xtmim-small-note\">For the broader furnace stage, see the <a href=\"https:\/\/xtmim.com\/mim-process\/sintering\/\">MIM sintering process<\/a> page.<\/p>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <nav class=\"xtmim-toc\" aria-label=\"Page contents\">\r\n    <p class=\"xtmim-toc-title\">Page Contents<\/p>\r\n    <div class=\"xtmim-toc-grid\">\r\n      <a href=\"#why-shrink\">Why MIM Parts Shrink<\/a>\r\n      <a href=\"#how-much\">How Much MIM Parts Shrink<\/a>\r\n      <a href=\"#controls\">What Controls Shrinkage Rate<\/a>\r\n      <a href=\"#tooling-compensation\">Tooling Compensation<\/a>\r\n      <a href=\"#uniform-vs-distortion\">Uniform Shrinkage vs. Distortion<\/a>\r\n      <a href=\"#tolerances\">Tolerances and Critical Dimensions<\/a>\r\n      <a href=\"#before-tooling\">What to Review Before Tooling<\/a>\r\n      <a href=\"#faq\">FAQ<\/a>\r\n    <\/div>\r\n  <\/nav>\r\n\r\n  <section class=\"xtmim-section\" id=\"why-shrink\">\r\n    <h2>Why Do MIM Parts Shrink During Sintering?<\/h2>\r\n\r\n    <h3>What happens to the brown part during sintering?<\/h3>\r\n    <p>After injection molding and debinding, a MIM part is not yet a fully dense metal component. It is a fragile brown part made from fine metal powder with most of the binder removed. The part still contains internal pore volume and must be sintered to develop density, strength, and final dimensions.<\/p>\r\n    <p>During sintering, metal particles bond together through diffusion. Pores reduce, the particle network becomes denser, and the overall part volume decreases. That dimensional reduction is what engineers call sintering shrinkage.<\/p>\r\n    <p>From a design review perspective, this matters because the CAD model represents the final part, while the molded green part and debound brown part are intentionally larger. The toolmaker and MIM manufacturer must plan this size change before cutting the mold. The upstream <a href=\"https:\/\/xtmim.com\/mim-process\/debinding\/\">MIM debinding process<\/a> also matters because the condition of the brown part affects how the part enters sintering.<\/p>\r\n\r\n    <figure class=\"xtmim-figure\">\r\n      <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/xtmim.com\/wp-content\/uploads\/2026\/06\/02-green-brown-sintered-mim-shrinkage.webp\" alt=\"Green, brown, and sintered MIM parts showing controlled dimensional reduction during sintering\" title=\"Green Brown and Sintered MIM Part Shrinkage Comparison\" width=\"1600\" height=\"900\" loading=\"lazy\">\r\n      <figcaption>Green, brown, and sintered part stages show why dimensional change is planned into the MIM process.<\/figcaption>\r\n      <div class=\"xtmim-figure-note\">The part becomes smaller as it densifies from green part to brown part to sintered metal component. This is why mold dimensions cannot simply copy final part dimensions.<\/div>\r\n    <\/figure>\r\n\r\n    <h3>Why densification causes dimensional reduction<\/h3>\r\n    <p>The brown part shrinks because the space previously occupied by binder and internal porosity is reduced as the metal powder structure densifies. The part does not simply \u201cdry\u201d or \u201ccool down.\u201d It changes from a powder-binder shaped body into a dense metal component.<\/p>\r\n    <p>This is why shrinkage is also linked to final density and mechanical performance. A part that does not densify properly may show dimensional problems, low density, reduced strength, or abnormal surface condition. However, focusing only on shrinkage percentage is misleading. The engineering goal is stable densification, predictable dimensions, and a realistic tolerance strategy.<\/p>\r\n\r\n    <h3>Why shrinkage is different from machining allowance<\/h3>\r\n    <p>A common mistake is to treat MIM shrinkage like CNC machining stock allowance. In CNC, extra material is removed by cutting. In MIM, the entire part scales down as the powder structure densifies. That shrinkage can interact with wall thickness, section transitions, hole geometry, gate location, green density, sintering support, and furnace conditions.<\/p>\r\n    <p>This means shrinkage review must happen before mold manufacturing, not after parts are already molded.<\/p>\r\n  <\/section>\r\n\r\n  <section class=\"xtmim-section xtmim-section-soft\" id=\"how-much\">\r\n    <h2>How Much Do MIM Parts Shrink During Sintering?<\/h2>\r\n\r\n    <h3>Use general shrinkage ranges only as an early reference<\/h3>\r\n    <p>Industry references often describe MIM shrinkage as a substantial and expected part of the sintering stage. MIMA\u2019s process overview explains the green part, brown part, sintered part sequence and notes that sintering produces high shrinkage related to the binder volume. See the <a href=\"https:\/\/www.mimaweb.org\/DesignCenter\/ProcessOverviewMIM.aspx\" target=\"_blank\" rel=\"nofollow noopener\">MIMA process overview<\/a> for general process context.<\/p>\r\n    <p>As an early reference, many MIM sources describe substantial linear shrinkage, often around 15\u201322% depending on binder volume, feedstock, alloy system, and process route. This should not be used as a final mold compensation value without supplier review, process data, and trial measurement.<\/p>\r\n    <p>For tooling decisions, a general shrinkage range is not enough. It should be treated as an early communication reference, not a universal mold compensation rule. A real project still needs material, feedstock, geometry, tolerance, and process review. If a buyer asks only \u201cWhat is your shrinkage rate?\u201d without providing drawings, that question is usually too broad to support reliable tooling decisions.<\/p>\r\n\r\n    <h3>Why one shrinkage percentage cannot fit all MIM projects<\/h3>\r\n    <p>The same nominal alloy may not produce exactly the same shrinkage in every project. Actual shrinkage depends on powder characteristics, binder system, solid loading, feedstock consistency, injection molding stability, green density distribution, wall thickness balance, debinding condition, sintering cycle, and support method.<\/p>\r\n    <p>In practice, the issue is not only average shrinkage. Variation across the part is often more important than the nominal shrinkage number. A part that shrinks uniformly can often be compensated in tooling. A part that shrinks unevenly may create dimensional drift, ovality, bending, flatness issues, or datum shift.<\/p>\r\n\r\n    <h3>When a generic shrinkage value becomes risky<\/h3>\r\n    <p>A general shrinkage value becomes unreliable when the part includes long thin geometry, thick-to-thin transitions, small precision holes, tight assembly datums, thin walls near large mass sections, asymmetric features, tight flatness requirements, or functional surfaces that cannot be post-machined easily.<\/p>\r\n    <p>For those parts, the correct RFQ question is not \u201cCan MIM shrink this part?\u201d The better question is: \u201cWhich dimensions can be controlled as-sintered, and which dimensions need a separate control strategy?\u201d<\/p>\r\n\r\n    <div class=\"xtmim-table-wrap\">\r\n      <table class=\"xtmim-table\">\r\n        <thead>\r\n          <tr>\r\n            <th>User Question<\/th>\r\n            <th>Engineering Answer<\/th>\r\n            <th>What Must Be Reviewed<\/th>\r\n          <\/tr>\r\n        <\/thead>\r\n        <tbody>\r\n          <tr>\r\n            <td>How much does a MIM part shrink?<\/td>\r\n            <td>MIM parts shrink substantially during sintering.<\/td>\r\n            <td>Material, feedstock, geometry, and process route.<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Is shrinkage predictable?<\/td>\r\n            <td>It can be predictable when the process and geometry are stable.<\/td>\r\n            <td>Green density, wall thickness, support, and trial measurements.<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Can the mold be made to final size?<\/td>\r\n            <td>No. The cavity must be oversized.<\/td>\r\n            <td>Expected shrinkage factor and critical dimensions.<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Can all dimensions be controlled as-sintered?<\/td>\r\n            <td>Some can, but not all features should be treated the same.<\/td>\r\n            <td>Functional datums, small holes, flatness, and assembly surfaces.<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Is shrinkage a defect?<\/td>\r\n            <td>No. Controlled shrinkage is normal in MIM.<\/td>\r\n            <td>Non-uniform shrinkage, distortion, or poor compensation.<\/td>\r\n          <\/tr>\r\n        <\/tbody>\r\n      <\/table>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"xtmim-section\" id=\"controls\">\r\n    <h2>What Controls the Actual Shrinkage Rate in MIM?<\/h2>\r\n\r\n    <p>The actual shrinkage rate is not controlled by the furnace alone. It starts with feedstock stability, continues through injection molding and debinding, and is finally validated through sintering and dimensional inspection.<\/p>\r\n\r\n    <figure class=\"xtmim-figure\">\r\n      <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/xtmim.com\/wp-content\/uploads\/2026\/06\/04-factors-affecting-mim-shrinkage.webp\" alt=\"MIM shrinkage control factors including feedstock pellets, sintered parts, support fixture, drawings, and inspection tools\" title=\"Factors Affecting MIM Sintering Shrinkage\" width=\"1600\" height=\"900\" loading=\"lazy\">\r\n      <figcaption>MIM shrinkage variation can be influenced by feedstock, part geometry, sintering support, and dimensional inspection.<\/figcaption>\r\n      <div class=\"xtmim-figure-note\">Stable shrinkage requires upstream material control, geometry review, support planning, and measurement feedback after sintering.<\/div>\r\n    <\/figure>\r\n\r\n    <h3>Material system and alloy behavior<\/h3>\r\n    <p>Different alloy systems sinter differently. Stainless steels, low-alloy steels, soft magnetic alloys, nickel alloys, titanium alloys, and other <a href=\"https:\/\/xtmim.com\/mim-materials\/\">MIM materials<\/a> may require different sintering windows and shrinkage assumptions. Even when two parts use the same material name, supplier feedstock and process route can influence actual shrinkage behavior.<\/p>\r\n    <p>From a design review perspective, material selection is not only about corrosion resistance, hardness, magnetic properties, or strength. It also affects sintering response and dimensional stability.<\/p>\r\n\r\n    <h3>Feedstock and solid loading<\/h3>\r\n    <p><a href=\"https:\/\/xtmim.com\/mim-process\/feedstock\/\">MIM feedstock<\/a> combines fine metal powder and binder into injection moldable pellets. <a href=\"https:\/\/xtmim.com\/mim-process\/feedstock\/solid-loading\/\">Solid loading<\/a> describes how much powder is packed into the binder system. Higher or lower powder loading changes how much volume must be removed or densified during the process.<\/p>\r\n    <p>If solid loading is inconsistent, the part may not shrink as expected. This is why stable feedstock and controlled molding conditions are important for dimensional control. Shrinkage does not begin as a furnace-only issue. It is influenced by the material system from the beginning of the <a href=\"https:\/\/xtmim.com\/mim-process\/\">MIM process<\/a>.<\/p>\r\n\r\n    <h3>Green density and injection molding stability<\/h3>\r\n    <p>Green density variation can become shrinkage variation later. If the molded part has density differences caused by filling imbalance, gate location, flow hesitation, weld lines, packing variation, or trapped defects, those differences may become dimensional variation, local deformation, or visible defect risk after sintering.<\/p>\r\n    <p>This is why <a href=\"https:\/\/xtmim.com\/mim-process\/injection-molding\/\">MIM injection molding<\/a> parameters matter even when the final issue appears after sintering. A dimensional problem found at final inspection may have started in feedstock preparation, molding, or green part handling.<\/p>\r\n\r\n    <h3>Wall thickness, support, and furnace loading<\/h3>\r\n    <p>Uniform wall thickness helps MIM parts shrink more predictably. EPMA notes that MIM tolerance capability may depend on material, part shape, and process requirements. For design engineers, that means dimensional review should consider drawing tolerance and geometry sensitivity together, not only the material name. See the <a href=\"https:\/\/www.epma.com\/what-is-pm\/powder-metallurgy-process\/metal-injection-moulding-mim\/\" target=\"_blank\" rel=\"nofollow noopener\">EPMA MIM overview<\/a> for general tolerance context.<\/p>\r\n    <p>The furnace cycle affects densification, but it is not the only control point. Temperature profile, holding time, atmosphere, loading method, setter design, and contact area can all influence final shape and dimensions. For parts with flatness, straightness, or long unsupported features, support planning becomes part of shrinkage control.<\/p>\r\n\r\n    <div class=\"xtmim-table-wrap\">\r\n      <table class=\"xtmim-table\">\r\n        <thead>\r\n          <tr>\r\n            <th>Factor<\/th>\r\n            <th>How It Affects Shrinkage<\/th>\r\n            <th>Engineering Review Point<\/th>\r\n          <\/tr>\r\n        <\/thead>\r\n        <tbody>\r\n          <tr>\r\n            <td>Material system<\/td>\r\n            <td>Different alloys densify differently.<\/td>\r\n            <td>Confirm material and feedstock route before tooling.<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Solid loading<\/td>\r\n            <td>Affects powder-to-binder ratio and shrinkage amount.<\/td>\r\n            <td>Review feedstock stability and expected shrinkage behavior.<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Green density<\/td>\r\n            <td>Density variation can cause shrinkage variation.<\/td>\r\n            <td>Check molding stability, filling balance, and gate influence.<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Wall thickness<\/td>\r\n            <td>Uneven thickness can create differential shrinkage.<\/td>\r\n            <td>Review part design before mold manufacturing.<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Geometry shape<\/td>\r\n            <td>Long, flat, asymmetric parts are more sensitive.<\/td>\r\n            <td>Evaluate support, orientation, and tolerance strategy.<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Debinding condition<\/td>\r\n            <td>Incomplete or uneven binder removal can affect sintering behavior.<\/td>\r\n            <td>Confirm debinding feasibility for thick or enclosed sections.<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Sintering support<\/td>\r\n            <td>Poor support may allow sagging or shape change.<\/td>\r\n            <td>Plan setter, support surface, and loading method.<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Furnace cycle<\/td>\r\n            <td>Temperature and time affect densification.<\/td>\r\n            <td>Confirm process window during trial production.<\/td>\r\n          <\/tr>\r\n        <\/tbody>\r\n      <\/table>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"xtmim-section xtmim-section-soft\" id=\"tooling-compensation\">\r\n    <h2>How Is Shrinkage Compensation Built Into MIM Tooling?<\/h2>\r\n\r\n    <figure class=\"xtmim-figure\">\r\n      <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/xtmim.com\/wp-content\/uploads\/2026\/06\/03-mim-tooling-oversize-final-dimension.webp\" alt=\"MIM tooling oversize concept showing mold cavity, green part, and final sintered part dimensional relationship\" title=\"MIM Tooling Oversize and Final Sintered Dimension\" width=\"1600\" height=\"900\" loading=\"lazy\">\r\n      <figcaption>MIM mold cavities are oversized to compensate for sintering shrinkage.<\/figcaption>\r\n      <div class=\"xtmim-figure-note\">Shrinkage is not corrected only after production; it is planned into the mold and validated through trial samples.<\/div>\r\n    <\/figure>\r\n\r\n    <h3>Why the mold cavity is larger than the final part<\/h3>\r\n    <p>MIM mold cavities are intentionally larger than the required final part. After molding, debinding, and sintering, the part shrinks toward the final target dimensions. The difference between cavity size and final part size is based on expected shrinkage compensation.<\/p>\r\n    <p>This compensation is sometimes discussed as an oversize factor. However, from an engineering standpoint, it should not be treated as a simple number copied from one project to another. Different features may respond differently depending on geometry, material, gating, wall thickness, and sintering support. For related mold development context, see <a href=\"https:\/\/xtmim.com\/capabilities\/mim-tooling\/\">MIM tooling<\/a>.<\/p>\r\n\r\n    <h3>How oversize factor is reviewed before tooling<\/h3>\r\n    <p>Before mold manufacturing, the engineering team should review final CAD and 2D drawing dimensions, material and feedstock route, critical-to-function dimensions, general tolerance versus tight tolerance areas, wall thickness variation, datum scheme, inspection method, features likely to need sizing or machining, sintering support concerns, and the trial sample measurement plan.<\/p>\r\n    <p>The purpose is not to make every dimension equally tight. The purpose is to separate dimensions that can be controlled by normal shrinkage compensation from dimensions that require special control.<\/p>\r\n\r\n    <h3>Why T1 \/ T2 samples are used to confirm real shrinkage<\/h3>\r\n    <p>Even when the expected shrinkage factor is well planned, early trial samples are important. T1 samples help confirm whether the real part follows the expected shrinkage pattern. T2 or later trials may be used to adjust tool dimensions, gating details, processing conditions, or secondary operation strategy.<\/p>\r\n    <p>A practical MIM project should expect dimensional learning during tooling validation. If the part has several critical dimensions, the drawing should clearly identify which dimensions are functional and which are general.<\/p>\r\n\r\n    <div class=\"xtmim-table-wrap\">\r\n      <table class=\"xtmim-table\">\r\n        <thead>\r\n          <tr>\r\n            <th>Dimension Type<\/th>\r\n            <th>Shrinkage Control Strategy<\/th>\r\n            <th>Typical Review Question<\/th>\r\n          <\/tr>\r\n        <\/thead>\r\n        <tbody>\r\n          <tr>\r\n            <td>General outer profile<\/td>\r\n            <td>Mold compensation + sintering control<\/td>\r\n            <td>Can this dimension be accepted as-sintered?<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Critical hole diameter<\/td>\r\n            <td>Tooling compensation, sizing, or machining<\/td>\r\n            <td>Is the tolerance too tight for as-sintered control?<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Thin wall section<\/td>\r\n            <td>DFM review + molding stability review<\/td>\r\n            <td>Will the wall fill and shrink consistently?<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Flatness \/ straightness<\/td>\r\n            <td>Geometry review + support planning<\/td>\r\n            <td>Will the part sag or distort during shrinkage?<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Assembly datum<\/td>\r\n            <td>Separate tolerance and inspection review<\/td>\r\n            <td>Does this datum need post-sintering calibration?<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Cosmetic surface<\/td>\r\n            <td>Shrinkage + support contact review<\/td>\r\n            <td>Will support marks or shrinkage effects affect appearance?<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Small slot or groove<\/td>\r\n            <td>Tooling compensation + inspection planning<\/td>\r\n            <td>Can the feature be molded, debound, and sintered reliably?<\/td>\r\n          <\/tr>\r\n        <\/tbody>\r\n      <\/table>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"xtmim-section\" id=\"uniform-vs-distortion\">\r\n    <h2>Uniform Shrinkage vs. Sintering Distortion: What Is the Difference?<\/h2>\r\n\r\n    <div class=\"xtmim-grid-2\">\r\n      <div class=\"xtmim-card xtmim-card-success\">\r\n        <h3>Uniform shrinkage means predictable scaling<\/h3>\r\n        <p>Uniform shrinkage means the part reduces in size in a controlled and predictable way. If the material, feedstock, molding process, geometry, and sintering conditions are stable, the mold can be compensated so that the final part approaches the target dimensions.<\/p>\r\n      <\/div>\r\n      <div class=\"xtmim-card xtmim-card-warning\">\r\n        <h3>Distortion means the part shape changes unevenly<\/h3>\r\n        <p>Sintering distortion occurs when the part does not simply scale down but changes shape. Examples include bending, sagging, twisting, ovality, datum shift, flatness loss, or local collapse.<\/p>\r\n      <\/div>\r\n    <\/div>\r\n\r\n    <p>Shrinkage compensation can correct predictable size reduction. It cannot fully solve shape change caused by poor support, unbalanced geometry, excessive wall thickness variation, unstable green density, or unsuitable furnace loading.<\/p>\r\n    <p>A common mistake is to assume that all dimensional problems can be fixed by changing the mold size. That is not always true. If a part bends during sintering, increasing or decreasing cavity size may not solve the root cause. The design may need a support strategy, wall thickness adjustment, feature modification, or post-sintering operation.<\/p>\r\n    <p>This issue should be evaluated separately when the part has long flat sections, asymmetric mass distribution, thin cantilever-like features, or tight flatness requirements. For broader context, return to the <a href=\"https:\/\/xtmim.com\/mim-process\/sintering\/\">MIM sintering process<\/a> page.<\/p>\r\n  <\/section>\r\n\r\n  <section class=\"xtmim-section xtmim-section-soft\" id=\"tolerances\">\r\n    <h2>How Does Sintering Shrinkage Affect Tolerances and Critical Dimensions?<\/h2>\r\n\r\n    <figure class=\"xtmim-figure\">\r\n      <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/xtmim.com\/wp-content\/uploads\/2026\/06\/05-mim-dimensional-inspection-after-sintering.webp\" alt=\"Dimensional inspection of sintered MIM parts using a CMM probe and inspection tools for tolerance review\" title=\"MIM Dimensional Inspection After Sintering\" width=\"1600\" height=\"900\" loading=\"lazy\">\r\n      <figcaption>Critical dimensions should be measured after sintering and reviewed before production approval.<\/figcaption>\r\n      <div class=\"xtmim-figure-note\">Shrinkage control must be verified through dimensional inspection, not assumed from a theoretical shrinkage percentage alone.<\/div>\r\n    <\/figure>\r\n\r\n    <h3>Why tight tolerances need early review<\/h3>\r\n    <p>MIM can produce complex small metal parts efficiently, but not every CNC-style tolerance should be transferred directly to MIM. The as-sintered tolerance depends on material, geometry, shrinkage stability, support method, and inspection requirements.<\/p>\r\n    <p>From a design review perspective, the first step is to classify dimensions into general dimensions, functional dimensions, assembly datums, cosmetic surfaces, post-processing surfaces, and inspection-critical features. This classification helps avoid over-controlling non-critical areas while missing dimensions that truly affect function. For downstream verification, the <a href=\"https:\/\/xtmim.com\/mim-process\/inspection\/\">MIM inspection process<\/a> should be aligned with the drawing datum scheme and the agreed critical dimensions.<\/p>\r\n\r\n    <h3>Which dimensions are suitable for as-sintered control<\/h3>\r\n    <p>As-sintered control is more realistic for dimensions with moderate tolerance requirements, stable geometry, balanced wall thickness, and clear inspection access. General external profiles, non-critical bosses, and some molded features may be controlled by proper tooling compensation and process stability.<\/p>\r\n    <p>However, this should not be assumed for every feature. Small holes, thin slots, tight concentricity, sealing surfaces, or assembly datums may require additional control.<\/p>\r\n\r\n    <h3>When sizing, machining, or secondary operations may be needed<\/h3>\r\n    <p><a href=\"https:\/\/xtmim.com\/mim-process\/sizing\/\">MIM sizing process<\/a>, machining, grinding, polishing, heat treatment, or surface finishing may be needed when the final requirement is tighter than what as-sintered control can reliably support. This does not mean the part is unsuitable for MIM. It means the process route must be planned correctly before tooling and RFQ confirmation. See <a href=\"https:\/\/xtmim.com\/mim-process\/secondary-operations\/\">MIM secondary operations<\/a> for related post-sintering process options.<\/p>\r\n\r\n    <h3>How to mark critical dimensions before RFQ<\/h3>\r\n    <p>The drawing should clearly identify critical-to-function features. Engineers should not force the supplier to guess which dimensions matter most. If all dimensions are marked as tight, the quote may become unrealistic or require unnecessary secondary operations. If key dimensions are not marked, the supplier may miss the true functional risk.<\/p>\r\n\r\n    <div class=\"xtmim-table-wrap\">\r\n      <table class=\"xtmim-table\">\r\n        <thead>\r\n          <tr>\r\n            <th>Feature<\/th>\r\n            <th>Shrinkage Risk<\/th>\r\n            <th>Suggested Review<\/th>\r\n          <\/tr>\r\n        <\/thead>\r\n        <tbody>\r\n          <tr>\r\n            <td>Thin wall<\/td>\r\n            <td>Uneven density and local shrinkage variation<\/td>\r\n            <td>Check minimum wall, filling balance, and debinding feasibility.<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Long flat part<\/td>\r\n            <td>Sagging or distortion during shrinkage<\/td>\r\n            <td>Review support method and flatness tolerance.<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Small hole<\/td>\r\n            <td>Diameter change, ovality, or closure risk<\/td>\r\n            <td>Review whether sizing or machining is required.<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Gear-like feature<\/td>\r\n            <td>Tooth profile and cumulative error<\/td>\r\n            <td>Review function, inspection method, and post-process need.<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Assembly datum<\/td>\r\n            <td>Datum shift after sintering<\/td>\r\n            <td>Define inspection datum before tooling.<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Thick-to-thin transition<\/td>\r\n            <td>Differential shrinkage and local stress<\/td>\r\n            <td>Review wall transition and radius design.<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Cosmetic face<\/td>\r\n            <td>Support marks or uneven surface appearance<\/td>\r\n            <td>Review orientation, support contact, and finishing requirement.<\/td>\r\n          <\/tr>\r\n        <\/tbody>\r\n      <\/table>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"xtmim-section\" id=\"before-tooling\">\r\n    <h2>What Should Be Reviewed Before Tooling to Control Shrinkage Risk?<\/h2>\r\n\r\n    <figure class=\"xtmim-figure\">\r\n      <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/xtmim.com\/wp-content\/uploads\/2026\/06\/06-mim-shrinkage-dfm-review-before-tooling.webp\" alt=\"MIM DFM review workbench with engineering drawings, CAD model, feedstock pellets, sample parts, and inspection tools before tooling\" title=\"MIM Shrinkage DFM Review Before Tooling\" width=\"1600\" height=\"900\" loading=\"lazy\">\r\n      <figcaption>Drawing-based DFM review helps identify shrinkage, tolerance, and tooling compensation risks before mold manufacturing.<\/figcaption>\r\n      <div class=\"xtmim-figure-note\">A useful shrinkage review requires drawings, CAD files, material requirements, critical dimension notes, and production context.<\/div>\r\n    <\/figure>\r\n\r\n    <h3>Drawing and 3D model review<\/h3>\r\n    <p>A 2D drawing shows tolerances, datums, surface requirements, and inspection notes. A 3D CAD model shows the complete geometry, wall thickness transitions, undercuts, ribs, holes, slots, and functional interfaces. Both are needed for shrinkage and tooling review. A structured <a href=\"https:\/\/xtmim.com\/capabilities\/engineering-review\/\">MIM engineering review<\/a> helps separate general dimensions from critical-to-function features before mold compensation is finalized.<\/p>\r\n    <p>If only a STEP file is provided without tolerances, the supplier can evaluate basic moldability but cannot judge whether the part can meet functional requirements after sintering.<\/p>\r\n\r\n    <h3>Material and feedstock review<\/h3>\r\n    <p>The material requirement affects sintering behavior, final density, strength, corrosion resistance, heat treatment options, and secondary operation planning. If the material is not fixed, the manufacturer can suggest a MIM-suitable alloy. If the material is fixed by the application, the design and tolerance review must work within that material\u2019s process behavior.<\/p>\r\n\r\n    <h3>Critical tolerance review<\/h3>\r\n    <p>Critical dimensions should be separated from general dimensions. This helps decide which dimensions can remain as-sintered, which may need sizing or machining, and which may require tolerance negotiation.<\/p>\r\n\r\n    <h3>Wall thickness and geometry review<\/h3>\r\n    <p>Wall thickness balance is one of the most important checks before tooling. Large thickness differences, isolated thick sections, thin gates, deep blind holes, and long unsupported areas should be reviewed before mold design is finalized.<\/p>\r\n\r\n    <h3>Secondary operation planning<\/h3>\r\n    <p>Secondary operations should not be treated as a last-minute correction. If a part needs sizing, machining, heat treatment, or surface finishing, those requirements should be included during RFQ and tooling planning.<\/p>\r\n\r\n    <h3>Annual volume and production stability review<\/h3>\r\n    <p>Annual volume affects tooling investment, validation depth, process control planning, and inspection strategy. For low-volume projects, the cost of tight secondary operations may dominate. For high-volume projects, early shrinkage control and tooling compensation become more important because small dimensional errors can repeat across large production batches.<\/p>\r\n\r\n    <div class=\"xtmim-table-wrap\">\r\n      <table class=\"xtmim-table\">\r\n        <thead>\r\n          <tr>\r\n            <th>Information Needed<\/th>\r\n            <th>Why It Matters<\/th>\r\n          <\/tr>\r\n        <\/thead>\r\n        <tbody>\r\n          <tr>\r\n            <td>2D drawing with tolerances<\/td>\r\n            <td>Identifies critical dimensions affected by shrinkage.<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>3D CAD model<\/td>\r\n            <td>Helps evaluate geometry, wall thickness, and molding feasibility.<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Material requirement<\/td>\r\n            <td>Different alloys may require different shrinkage assumptions.<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Critical dimensions<\/td>\r\n            <td>Separates functional dimensions from general dimensions.<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Flatness \/ roundness \/ concentricity requirements<\/td>\r\n            <td>Determines whether as-sintered control is realistic.<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Surface requirements<\/td>\r\n            <td>Helps assess support marks and secondary finishing need.<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Annual volume<\/td>\r\n            <td>Affects tooling strategy and process validation level.<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Application background<\/td>\r\n            <td>Helps judge whether dimensional risk affects function.<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Post-processing expectations<\/td>\r\n            <td>Clarifies whether sizing, machining, heat treatment, or finishing is required.<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Inspection method<\/td>\r\n            <td>Helps align supplier measurement plan with drawing requirements.<\/td>\r\n          <\/tr>\r\n        <\/tbody>\r\n      <\/table>\r\n    <\/div>\r\n\r\n    <p>For drawing-based review, use <a href=\"https:\/\/xtmim.com\/submit-drawing-for-review\/\">Submit Drawing for Review<\/a>. If you are preparing a formal RFQ package, see the <a href=\"https:\/\/xtmim.com\/rfq-preparation-guide\/\">RFQ Preparation Guide<\/a>.<\/p>\r\n  <\/section>\r\n\r\n  <section class=\"xtmim-section xtmim-section-soft\" id=\"mistakes\">\r\n    <h2>Common Mistakes When Estimating MIM Sintering Shrinkage<\/h2>\r\n\r\n    <div class=\"xtmim-checklist\">\r\n      <div class=\"xtmim-check-item\">\r\n        <strong>Treating shrinkage as one fixed percentage<\/strong>\r\n        A fixed value may support early discussion, but it is not enough for mold manufacturing or critical tolerance decisions.\r\n      <\/div>\r\n      <div class=\"xtmim-check-item\">\r\n        <strong>Ignoring wall thickness variation<\/strong>\r\n        Thick and thin sections can behave differently during debinding and sintering, creating differential shrinkage risk.\r\n      <\/div>\r\n      <div class=\"xtmim-check-item\">\r\n        <strong>Copying CNC tolerances directly to MIM<\/strong>\r\n        CNC machining and MIM sintering use different dimensional control strategies. Some tolerances need redesign, sizing, or machining.\r\n      <\/div>\r\n      <div class=\"xtmim-check-item\">\r\n        <strong>Reviewing price before critical dimensions<\/strong>\r\n        A quote based only on material and quantity may miss the real dimensional risk.\r\n      <\/div>\r\n      <div class=\"xtmim-check-item\">\r\n        <strong>Ignoring support planning<\/strong>\r\n        Parts with flatness or long unsupported features may need sintering support review.\r\n      <\/div>\r\n      <div class=\"xtmim-check-item\">\r\n        <strong>Treating secondary operations as emergency fixes<\/strong>\r\n        Sizing or machining should be planned early when critical features require it.\r\n      <\/div>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"xtmim-section xtmim-scenario\" id=\"scenario\">\r\n    <h2>Composite Field Scenario for Engineering Training: Shrinkage Review Before MIM Tooling<\/h2>\r\n\r\n    <h3>What problem occurred<\/h3>\r\n    <p>A small stainless steel component was considered for MIM production. The part had a compact body, several small holes, one flat assembly surface, and a local thick section near a thin wall. The initial drawing applied tight tolerances across several dimensions without distinguishing functional dimensions from general dimensions.<\/p>\r\n\r\n    <h3>Why it happened<\/h3>\r\n    <p>The original drawing had been prepared with machined prototypes in mind. The designer expected the same tolerance logic to transfer directly to MIM. However, the part would go through injection molding, debinding, and sintering, meaning the final dimensions would depend on shrinkage compensation and process stability.<\/p>\r\n\r\n    <h3>What the real system cause was<\/h3>\r\n    <p>The main risk was not only the expected average shrinkage. The real system concern was differential shrinkage between the thick section, thin wall, and small holes. The flat assembly surface also needed review because support and sintering orientation could affect flatness.<\/p>\r\n\r\n    <h3>How it was corrected<\/h3>\r\n    <p>The drawing was separated into general dimensions and critical-to-function dimensions. General dimensions were kept suitable for as-sintered control. The most important hole and assembly datum were flagged for special review. The engineering plan considered whether sizing or local machining would be needed after sintering.<\/p>\r\n\r\n    <h3>How to prevent recurrence<\/h3>\r\n    <p>Before tooling, the customer should provide 2D drawings, 3D CAD files, material requirements, critical dimensions, tolerance notes, and annual volume. The supplier should review shrinkage compensation, molding feasibility, sintering support, and inspection strategy before confirming mold design.<\/p>\r\n    <p class=\"xtmim-small-note\">This scenario is illustrative and should be confirmed through actual drawing review, trial measurements, and production validation.<\/p>\r\n  <\/section>\r\n\r\n  <section class=\"xtmim-section xtmim-faq\" id=\"faq\">\r\n    <h2>FAQ About MIM Sintering Shrinkage<\/h2>\r\n\r\n    <details>\r\n      <summary>How much do MIM parts shrink during sintering?<\/summary>\r\n      <p>MIM parts usually experience substantial linear shrinkage during sintering, but the exact value depends on material, feedstock, solid loading, geometry, and process route. General industry ranges are useful for early understanding, but they should not be used as final tooling assumptions. For RFQ and mold design, the supplier should review the drawing, critical dimensions, material requirement, and expected sintering behavior before confirming shrinkage compensation.<\/p>\r\n    <\/details>\r\n\r\n    <details>\r\n      <summary>Is sintering shrinkage a defect in MIM?<\/summary>\r\n      <p>No. Controlled sintering shrinkage is a normal part of the MIM process. The part is intentionally molded larger and then shrinks during densification. The risk is not shrinkage itself, but uncontrolled shrinkage, non-uniform shrinkage, poor tooling compensation, or distortion during sintering. These issues can affect final dimensions, hole size, flatness, roundness, and assembly datums.<\/p>\r\n    <\/details>\r\n\r\n    <details>\r\n      <summary>Can MIM shrinkage be predicted before tooling?<\/summary>\r\n      <p>MIM shrinkage can be estimated before tooling when the material system, feedstock, geometry, and process route are known. However, actual shrinkage should be verified through tooling trials and sample measurement. For critical parts, engineers should identify which dimensions can be controlled as-sintered and which may require sizing, machining, or tolerance adjustment.<\/p>\r\n    <\/details>\r\n\r\n    <details>\r\n      <summary>Why are MIM mold cavities larger than final part dimensions?<\/summary>\r\n      <p>MIM mold cavities are larger because the green and brown parts must shrink during sintering to reach final density and dimensions. This is called shrinkage compensation or oversize factor planning. The cavity size must account for expected material shrinkage, geometry behavior, and critical dimensions. It is not recommended to cut the mold directly to final part size.<\/p>\r\n    <\/details>\r\n\r\n    <details>\r\n      <summary>Can shrinkage compensation remove all dimensional risk?<\/summary>\r\n      <p>No. Shrinkage compensation can help control predictable size reduction, but it cannot remove every dimensional risk. If a part bends, sags, twists, develops ovality, or loses datum stability during sintering, the issue may come from geometry imbalance, green density variation, poor support, or an unrealistic tolerance requirement. Those risks may require design review, support planning, sizing, machining, or tolerance adjustment.<\/p>\r\n    <\/details>\r\n\r\n    <details>\r\n      <summary>What causes uneven shrinkage in MIM parts?<\/summary>\r\n      <p>Uneven shrinkage can be caused by wall thickness variation, green density variation, filling imbalance, unsuitable gate location, incomplete debinding, unstable feedstock, asymmetric geometry, or poor sintering support. Some issues start before sintering but become visible after sintering. This is why shrinkage control must be reviewed across feedstock, molding, debinding, and sintering stages.<\/p>\r\n    <\/details>\r\n\r\n    <details>\r\n      <summary>When does a MIM part need sizing or machining after sintering?<\/summary>\r\n      <p>A MIM part may need sizing or machining when the required tolerance is tighter than reliable as-sintered control, or when a feature is critical for assembly, sealing, rotation, alignment, or measurement datum control. Small holes, precision slots, flat sealing surfaces, concentric features, and tight datums are common areas for review. The need should be confirmed before tooling and RFQ approval.<\/p>\r\n    <\/details>\r\n\r\n    <details>\r\n      <summary>What should I provide for a shrinkage and tooling review?<\/summary>\r\n      <p>Provide a 2D drawing with tolerances, 3D CAD model, material requirement, critical dimensions, surface requirements, annual volume, application background, and any assembly or inspection requirements. This information helps the engineering team review shrinkage compensation, tolerance strategy, sintering support, and whether secondary operations are needed.<\/p>\r\n    <\/details>\r\n  <\/section>\r\n\r\n  <section class=\"xtmim-cta\" id=\"project-review\">\r\n    <h2>Request a Shrinkage and Dimensional Control Review Before Tooling<\/h2>\r\n    <p>For MIM projects with tight tolerances, small holes, thin walls, flatness requirements, or assembly-critical dimensions, shrinkage review should be completed before mold manufacturing.<\/p>\r\n    <p>Please send 2D drawings with tolerances, 3D CAD files, material requirements, critical-to-function dimensions, surface finish requirements, estimated annual volume, application and assembly background, and any inspection or acceptance requirements.<\/p>\r\n    <p>XTMIM\u2019s engineering team can review whether the part is suitable for MIM, which dimensions may be controlled as-sintered, where tooling compensation needs special attention, and whether sizing, machining, or design adjustment should be considered before production planning.<\/p>\r\n\r\n    <div class=\"xtmim-button-row\">\r\n      <a class=\"xtmim-btn\" href=\"https:\/\/xtmim.com\/submit-drawing-for-review\/\">Submit Drawing for Review<\/a>\r\n      <a class=\"xtmim-btn secondary\" href=\"https:\/\/xtmim.com\/request-a-quote\/\">Request a Quote<\/a>\r\n      <a class=\"xtmim-btn secondary\" href=\"https:\/\/xtmim.com\/contact-us\/\">Contact XTMIM<\/a>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"xtmim-author\" id=\"engineering-review\">\r\n    <h2>Reviewed by XTMIM Engineering Team<\/h2>\r\n    <p>This page was prepared from a MIM process engineering perspective, with attention to process suitability, material selection, DFM review, tooling compensation, sintering shrinkage risk, tolerance planning, inspection requirements, and production feasibility.<\/p>\r\n    <p>Project-specific results may vary depending on material, feedstock, geometry, sintering support, dimensional requirements, and inspection method. Final manufacturability should be confirmed through drawing-based engineering review rather than a generic shrinkage assumption.<\/p>\r\n  <\/section>\r\n\r\n  <section class=\"xtmim-standards\" id=\"standards\">\r\n    <h2>Standards and Technical References Note<\/h2>\r\n    <p>MIM sintering shrinkage should be evaluated using both process experience and relevant technical references. Industry sources can support general understanding of MIM processing, materials, densification, and tolerance context, but they do not replace project-specific DFM review.<\/p>\r\n    <ul>\r\n      <li><a href=\"https:\/\/www.mimaweb.org\/DesignCenter\/ProcessOverviewMIM.aspx\" target=\"_blank\" rel=\"nofollow noopener\">MIMA Process Overview: MIM<\/a> \u2014 useful for general process context, including green part, brown part, sintering, shrinkage, and densification.<\/li>\r\n      <li><a href=\"https:\/\/www.epma.com\/what-is-pm\/powder-metallurgy-process\/metal-injection-moulding-mim\/\" target=\"_blank\" rel=\"nofollow noopener\">EPMA Metal Injection Moulding Overview<\/a> \u2014 useful for tolerance context and the relationship between dimensional capability, material, part shape, and process requirements.<\/li>\r\n      <li><a href=\"https:\/\/www.mpif.org\/Resources\/Standards.aspx\" target=\"_blank\" rel=\"nofollow noopener\">MPIF Standards<\/a> \u2014 useful for MIM material standards context, including Standard 35-MIM references for commonly used metal injection molded materials.<\/li>\r\n      <li><a href=\"https:\/\/store.astm.org\/b0883-24.html\" target=\"_blank\" rel=\"nofollow noopener\">ASTM B883<\/a> \u2014 relevant for ferrous MIM material specification context. It should not be used as a universal shrinkage compensation or tolerance design rule.<\/li>\r\n    <\/ul>\r\n    <p class=\"xtmim-small-note\">Final material selection, tolerance acceptance, and inspection planning should be confirmed against the latest applicable standards, customer drawings, supplier process data, trial measurements, and project-specific process capability.<\/p>\r\n  <\/section>\r\n\r\n<\/article>\r\n\r\n<script type=\"application\/ld+json\">\r\n{\r\n  \"@context\": \"https:\/\/schema.org\",\r\n  \"@type\": \"BreadcrumbList\",\r\n  \"itemListElement\": [\r\n    {\r\n      \"@type\": \"ListItem\",\r\n      \"position\": 1,\r\n      \"name\": \"Home\",\r\n      \"item\": \"https:\/\/xtmim.com\/\"\r\n    },\r\n    {\r\n      \"@type\": \"ListItem\",\r\n      \"position\": 2,\r\n      \"name\": \"MIM Process\",\r\n      \"item\": \"https:\/\/xtmim.com\/mim-process\/\"\r\n    },\r\n    {\r\n      \"@type\": \"ListItem\",\r\n      \"position\": 3,\r\n      \"name\": \"Sintering\",\r\n      \"item\": \"https:\/\/xtmim.com\/mim-process\/sintering\/\"\r\n    },\r\n    {\r\n      \"@type\": \"ListItem\",\r\n      \"position\": 4,\r\n      \"name\": \"MIM Sintering Shrinkage\",\r\n      \"item\": \"https:\/\/xtmim.com\/mim-process\/sintering\/sintering-shrinkage\/\"\r\n    }\r\n  ]\r\n}\r\n<\/script>\r\n\r\n<script type=\"application\/ld+json\">\r\n{\r\n  \"@context\": \"https:\/\/schema.org\",\r\n  \"@type\": \"FAQPage\",\r\n  \"mainEntity\": [\r\n    {\r\n      \"@type\": \"Question\",\r\n      \"name\": \"How much do MIM parts shrink during sintering?\",\r\n      \"acceptedAnswer\": {\r\n        \"@type\": \"Answer\",\r\n        \"text\": \"MIM parts usually experience substantial linear shrinkage during sintering, but the exact value depends on material, feedstock, solid loading, geometry, and process route. 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For design engineers, the main issue is not whether the part will&#8230;<\/p>","protected":false},"author":1,"featured_media":55382,"parent":52837,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-55393","page","type-page","status-publish","has-post-thumbnail","hentry"],"_links":{"self":[{"href":"https:\/\/xtmim.com\/ar\/wp-json\/wp\/v2\/pages\/55393","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/xtmim.com\/ar\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/xtmim.com\/ar\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/xtmim.com\/ar\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/xtmim.com\/ar\/wp-json\/wp\/v2\/comments?post=55393"}],"version-history":[{"count":4,"href":"https:\/\/xtmim.com\/ar\/wp-json\/wp\/v2\/pages\/55393\/revisions"}],"predecessor-version":[{"id":55397,"href":"https:\/\/xtmim.com\/ar\/wp-json\/wp\/v2\/pages\/55393\/revisions\/55397"}],"up":[{"embeddable":true,"href":"https:\/\/xtmim.com\/ar\/wp-json\/wp\/v2\/pages\/52837"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/xtmim.com\/ar\/wp-json\/wp\/v2\/media\/55382"}],"wp:attachment":[{"href":"https:\/\/xtmim.com\/ar\/wp-json\/wp\/v2\/media?parent=55393"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}