{"id":1972,"date":"2026-09-23T01:40:22","date_gmt":"2026-09-23T01:40:22","guid":{"rendered":"https:\/\/www.wjlsteelsupplier.com\/?p=1972"},"modified":"2026-09-23T01:40:25","modified_gmt":"2026-09-23T01:40:25","slug":"stainless-steel-material-test-certificate","status":"publish","type":"post","link":"https:\/\/www.wjlsteelsupplier.com\/ja\/stainless-steel-material-test-certificate\/","title":{"rendered":"What Is a Stainless Steel Material Test Certificate?"},"content":{"rendered":"<p class=\"wp-block-paragraph\">A <strong>Stainless Steel Material Test Certificate (MTC)<\/strong> is a document that provides information about supplied steel and, depending on the document type, test results demonstrating its conformity with specified requirements.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For stainless steel, an MTC may identify the <strong>material grade, applicable standard, heat or cast number, chemical composition, mechanical properties, and inspection information<\/strong>. The exact contents depend on the applicable product specification and inspection-document type.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">MTCs are commonly used to support <strong>material conformity and traceability<\/strong>. In international steel supply, you may also encounter terms such as <strong>\u5de5\u5834\u8a66\u9a13\u8a3c\u660e\u66f8\uff08MTC\uff09<\/strong> \u305d\u3057\u3066 <strong>Mill Test Report (MTR)<\/strong>. However, the document name alone does not tell you exactly what level of inspection or evidence it contains.<\/p>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_83 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">\u76ee\u6b21<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"\u30c8\u30b0\u30eb\u76ee\u6b21\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">\u30c8\u30b0\u30eb<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.wjlsteelsupplier.com\/ja\/stainless-steel-material-test-certificate\/#What_Is_a_Stainless_Steel_MTC_Used_For\" >What Is a Stainless Steel MTC Used For?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.wjlsteelsupplier.com\/ja\/stainless-steel-material-test-certificate\/#Documenting_Material_Conformity\" >Documenting Material Conformity<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.wjlsteelsupplier.com\/ja\/stainless-steel-material-test-certificate\/#Recording_Test_Information\" >Recording Test Information<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.wjlsteelsupplier.com\/ja\/stainless-steel-material-test-certificate\/#Supporting_Material_Traceability\" >Supporting Material Traceability<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.wjlsteelsupplier.com\/ja\/stainless-steel-material-test-certificate\/#What_Information_Does_a_Stainless_Steel_MTC_Contain\" >What Information Does a Stainless Steel MTC Contain?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.wjlsteelsupplier.com\/ja\/stainless-steel-material-test-certificate\/#Material_Identification\" >Material Identification<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.wjlsteelsupplier.com\/ja\/stainless-steel-material-test-certificate\/#Chemical_Composition\" >\u5316\u5b66\u7d44\u6210<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.wjlsteelsupplier.com\/ja\/stainless-steel-material-test-certificate\/#Mechanical_Properties\" >Mechanical Properties<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.wjlsteelsupplier.com\/ja\/stainless-steel-material-test-certificate\/#Inspection_and_Certification_Information\" >Inspection and Certification Information<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.wjlsteelsupplier.com\/ja\/stainless-steel-material-test-certificate\/#MTC_MTR_and_Material_Certificate_Whats_the_Difference\" >MTC, MTR, and Material Certificate: What&#8217;s the Difference?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.wjlsteelsupplier.com\/ja\/stainless-steel-material-test-certificate\/#MTC_and_Mill_Test_Certificate\" >MTC and Mill Test Certificate<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.wjlsteelsupplier.com\/ja\/stainless-steel-material-test-certificate\/#MTC_and_MTR\" >MTC and MTR<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.wjlsteelsupplier.com\/ja\/stainless-steel-material-test-certificate\/#Material_Certificate_Is_Not_One_Universal_Format\" >Material Certificate Is Not One Universal Format<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.wjlsteelsupplier.com\/ja\/stainless-steel-material-test-certificate\/#What_Are_EN_10204_Inspection_Documents\" >What Are EN 10204 Inspection Documents?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.wjlsteelsupplier.com\/ja\/stainless-steel-material-test-certificate\/#What_Is_an_EN_10204_21_Document\" >What Is an EN 10204 2.1 Document?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/www.wjlsteelsupplier.com\/ja\/stainless-steel-material-test-certificate\/#What_Is_an_EN_10204_22_Document\" >What Is an EN 10204 2.2 Document?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/www.wjlsteelsupplier.com\/ja\/stainless-steel-material-test-certificate\/#What_Is_an_EN_10204_31_Certificate\" >What Is an EN 10204 3.1 Certificate?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/www.wjlsteelsupplier.com\/ja\/stainless-steel-material-test-certificate\/#What_Is_an_EN_10204_32_Certificate\" >What Is an EN 10204 3.2 Certificate?<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/www.wjlsteelsupplier.com\/ja\/stainless-steel-material-test-certificate\/#How_Does_an_MTC_Support_Stainless_Steel_Traceability\" >How Does an MTC Support Stainless Steel Traceability?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/www.wjlsteelsupplier.com\/ja\/stainless-steel-material-test-certificate\/#The_Role_of_the_Heat_or_Cast_Number\" >The Role of the Heat or Cast Number<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/www.wjlsteelsupplier.com\/ja\/stainless-steel-material-test-certificate\/#Why_Traceability_Matters\" >Why Traceability Matters<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/www.wjlsteelsupplier.com\/ja\/stainless-steel-material-test-certificate\/#Traceability_Through_Processing_and_Supply\" >Traceability Through Processing and Supply<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/www.wjlsteelsupplier.com\/ja\/stainless-steel-material-test-certificate\/#What_Does_an_MTC_Prove%E2%80%94and_What_Does_It_Not_Prove\" >What Does an MTC Prove\u2014and What Does It Not Prove?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/www.wjlsteelsupplier.com\/ja\/stainless-steel-material-test-certificate\/#What_an_MTC_Can_Document\" >What an MTC Can Document<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-25\" href=\"https:\/\/www.wjlsteelsupplier.com\/ja\/stainless-steel-material-test-certificate\/#What_an_MTC_Does_Not_Automatically_Guarantee\" >What an MTC Does Not Automatically Guarantee<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-26\" href=\"https:\/\/www.wjlsteelsupplier.com\/ja\/stainless-steel-material-test-certificate\/#Why_MTC_Requirements_Should_Be_Defined_Before_Ordering\" >Why MTC Requirements Should Be Defined Before Ordering<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-27\" href=\"https:\/\/www.wjlsteelsupplier.com\/ja\/stainless-steel-material-test-certificate\/#The_Required_Certificate_Type_Depends_on_the_Project\" >The Required Certificate Type Depends on the Project<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-28\" href=\"https:\/\/www.wjlsteelsupplier.com\/ja\/stainless-steel-material-test-certificate\/#The_Material_Specification_and_Certificate_Work_Together\" >The Material Specification and Certificate Work Together<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-29\" href=\"https:\/\/www.wjlsteelsupplier.com\/ja\/stainless-steel-material-test-certificate\/#How_Weijunli_Steel_Can_Help_With_Material_Supply_and_Documentation\" >How Weijunli Steel Can Help With Material Supply and Documentation<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-30\" href=\"https:\/\/www.wjlsteelsupplier.com\/ja\/stainless-steel-material-test-certificate\/#Conclusion_What_Is_a_Stainless_Steel_Material_Test_Certificate\" >Conclusion: What Is a Stainless Steel Material Test Certificate?<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Is_a_Stainless_Steel_MTC_Used_For\"><\/span>What Is a Stainless Steel MTC Used For?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">An MTC connects the <strong>physical material supplied<\/strong> with documented information about that material.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Documenting_Material_Conformity\"><\/span>Documenting Material Conformity<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A stainless steel order normally specifies requirements such as a material grade and applicable product standard. An inspection document provides evidence related to whether the supplied material meets those requirements.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The relevant requirements do not come from EN 10204 itself. <strong>EN 10204 defines types of inspection documents; the applicable product specification defines the technical requirements for the material.<\/strong> <\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Recording_Test_Information\"><\/span>Recording Test Information<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Depending on the certificate type and product specification, the document can contain results from tests or inspections such as chemical analysis and mechanical testing.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Supporting_Material_Traceability\"><\/span>Supporting Material Traceability<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">An MTC also helps establish a documentary connection between the steel and its production identification, such as a <strong>heat or cast number<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The basic concept is:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Steel production \u2192 heat\/cast identification \u2192 test information \u2192 inspection document \u2192 supplied material<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This becomes particularly important when material documentation must be retained for a project or quality record.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"1500\" height=\"839\" src=\"https:\/\/www.wjlsteelsupplier.com\/wp-content\/uploads\/2026\/04\/wholesale-steel-factory-weijunli.webp\" alt=\"\u5378\u58f2\u92fc\u9244\u5de5\u5834weijunli\" class=\"wp-image-1668\" srcset=\"https:\/\/www.wjlsteelsupplier.com\/wp-content\/uploads\/2026\/04\/wholesale-steel-factory-weijunli.webp 1500w, https:\/\/www.wjlsteelsupplier.com\/wp-content\/uploads\/2026\/04\/wholesale-steel-factory-weijunli-300x168.webp 300w, https:\/\/www.wjlsteelsupplier.com\/wp-content\/uploads\/2026\/04\/wholesale-steel-factory-weijunli-768x430.webp 768w, https:\/\/www.wjlsteelsupplier.com\/wp-content\/uploads\/2026\/04\/wholesale-steel-factory-weijunli-18x10.webp 18w, https:\/\/www.wjlsteelsupplier.com\/wp-content\/uploads\/2026\/04\/wholesale-steel-factory-weijunli-1200x671.webp 1200w, https:\/\/www.wjlsteelsupplier.com\/wp-content\/uploads\/2026\/04\/wholesale-steel-factory-weijunli-600x336.webp 600w\" sizes=\"(max-width: 1500px) 100vw, 1500px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Information_Does_a_Stainless_Steel_MTC_Contain\"><\/span>What Information Does a Stainless Steel MTC Contain?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The exact format varies according to the product standard and inspection-document type, but an MTC may contain several categories of information.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Material_Identification\"><\/span>Material Identification<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Typical information can include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30b9\u30c6\u30f3\u30ec\u30b9\u92fc\u306e\u30b0\u30ec\u30fc\u30c9<\/li>\n\n\n\n<li>Product specification<\/li>\n\n\n\n<li>\u88fd\u54c1\u306e\u5f62\u614b<\/li>\n\n\n\n<li>\u5bf8\u6cd5<\/li>\n\n\n\n<li>\u6570\u91cf<\/li>\n\n\n\n<li>Heat or cast number<\/li>\n\n\n\n<li>Order or product identification<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">This establishes what material the document applies to.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Chemical_Composition\"><\/span>\u5316\u5b66\u7d44\u6210<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">An MTC may report the chemical composition of the steel, including elements such as:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Chromium<\/li>\n\n\n\n<li>Nickel<\/li>\n\n\n\n<li>Carbon<\/li>\n\n\n\n<li>Molybdenum<\/li>\n\n\n\n<li>Manganese<\/li>\n\n\n\n<li>\u30b7\u30ea\u30b3\u30f3<\/li>\n\n\n\n<li>Nitrogen<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">These values can then be considered against the limits specified by the applicable material standard.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Mechanical_Properties\"><\/span>Mechanical Properties<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Depending on the product and specification, an inspection document may include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u964d\u4f0f\u5f37\u5ea6<\/li>\n\n\n\n<li>\u5f15\u5f35\u5f37\u5ea6<\/li>\n\n\n\n<li>\u4f38\u3073<\/li>\n\n\n\n<li>\u786c\u5ea6<\/li>\n\n\n\n<li>Impact properties, where applicable<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The required tests vary by material specification.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Inspection_and_Certification_Information\"><\/span>Inspection and Certification Information<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The document may also identify the applicable inspection-document type, conformity statement, validation, and relevant inspection personnel.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This matters because a <strong>2.2 test report and a 3.1 inspection certificate do not represent the same inspection basis<\/strong>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"MTC_MTR_and_Material_Certificate_Whats_the_Difference\"><\/span>MTC, MTR, and Material Certificate: What&#8217;s the Difference?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Steel buyers may encounter several different names for material documentation.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"MTC_and_Mill_Test_Certificate\"><\/span>MTC and Mill Test Certificate<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Material Test Certificate<\/strong> \u305d\u3057\u3066 <strong>Mill Test Certificate<\/strong> are commonly used terms for documentation associated with material testing and conformity.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">However, \u201cMTC\u201d by itself does not define a universal document format.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"MTC_and_MTR\"><\/span>MTC and MTR<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Mill Test Report (MTR)<\/strong> is another common industry term.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In practice, suppliers and buyers may use MTC and MTR somewhat interchangeably. But when a project requires a particular certification level, the important question is not simply whether the document is called an MTC or MTR.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The important questions are:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>What standard applies? What inspection type was required? What tests were performed? How was the document validated?<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Material_Certificate_Is_Not_One_Universal_Format\"><\/span>Material Certificate Is Not One Universal Format<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u201cMaterial certificate\u201d is a broad description. It does not automatically mean that the document is an <strong>EN 10204 3.1<\/strong> \u307e\u305f\u306f <strong>3.2<\/strong> certificate.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The certificate type and applicable product specification determine what the document actually represents.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Are_EN_10204_Inspection_Documents\"><\/span>What Are EN 10204 Inspection Documents?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>EN 10204<\/strong> defines different types of inspection documents supplied to purchasers of metallic products. It is used together with the relevant product specification, which establishes the technical delivery requirements. <\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Type<\/th><th>Document<\/th><th>Basic meaning<\/th><\/tr><\/thead><tbody><tr><td><strong>2.1<\/strong><\/td><td>Declaration of compliance<\/td><td>Manufacturer confirms compliance with the order, without test results<\/td><\/tr><tr><td><strong>2.2<\/strong><\/td><td>Test report<\/td><td>Compliance statement with results from non-specific inspection<\/td><\/tr><tr><td><strong>3.1<\/strong><\/td><td>Inspection certificate 3.1<\/td><td>Compliance statement with results from specific inspection<\/td><\/tr><tr><td><strong>3.2<\/strong><\/td><td>Inspection certificate 3.2<\/td><td>Specific inspection with additional validation<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Is_an_EN_10204_21_Document\"><\/span>What Is an EN 10204 2.1 Document?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A <strong>2.1 declaration of compliance<\/strong> confirms that the products comply with the order requirements but does not provide test results. It is validated by the manufacturer. <\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Is_an_EN_10204_22_Document\"><\/span>What Is an EN 10204 2.2 Document?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A <strong>2.2 test report<\/strong> contains a compliance statement together with results from <strong>non-specific inspection<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This means the manufacturer assesses products made under the relevant specification and manufacturing conditions, but the products tested are not necessarily the exact products supplied to the customer. <\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Is_an_EN_10204_31_Certificate\"><\/span>What Is an EN 10204 3.1 Certificate?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A <strong>3.1 inspection certificate<\/strong> contains a compliance statement and results from a <strong>specific inspection<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The certificate is validated by the manufacturer&#8217;s authorized inspection representative who is independent of the manufacturing department. <\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Is_an_EN_10204_32_Certificate\"><\/span>What Is an EN 10204 3.2 Certificate?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A <strong>3.2 inspection certificate<\/strong> also involves specific inspection, but its validation includes the manufacturer&#8217;s authorized independent inspection representative <strong>and either the purchaser&#8217;s authorized inspection representative or an inspector designated by official regulations<\/strong>. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Importantly, <strong>3.2 does not simply mean \u201chigher-quality steel\u201d than 3.1<\/strong>. The distinction concerns the inspection and validation arrangement.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_Does_an_MTC_Support_Stainless_Steel_Traceability\"><\/span>How Does an MTC Support Stainless Steel Traceability?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"The_Role_of_the_Heat_or_Cast_Number\"><\/span>The Role of the Heat or Cast Number<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A <strong>heat number<\/strong> \u307e\u305f\u306f <strong>cast number<\/strong> identifies a particular production heat or cast of steel.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">It provides an important link between the material and its associated production and test documentation.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The concept can be simplified as:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Production heat \u2192 heat number \u2192 material identification \u2192 test records \u2192 certificate<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Why_Traceability_Matters\"><\/span>Why Traceability Matters<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Material traceability can support:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Quality records<\/li>\n\n\n\n<li>Project documentation<\/li>\n\n\n\n<li>Material identification<\/li>\n\n\n\n<li>Investigation of nonconforming material<\/li>\n\n\n\n<li>Communication between suppliers and customers<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The value of the certificate therefore depends partly on its connection to identifiable physical material.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Traceability_Through_Processing_and_Supply\"><\/span>Traceability Through Processing and Supply<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">When steel is subsequently cut, processed, or distributed, maintaining appropriate identification becomes important whenever the order or project requires material traceability.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The objective is straightforward: <strong>the documentation should remain connected to the material it represents.<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Does_an_MTC_Prove%E2%80%94and_What_Does_It_Not_Prove\"><\/span>What Does an MTC Prove\u2014and What Does It Not Prove?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">An MTC can provide useful documented evidence, but its scope has limits.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_an_MTC_Can_Document\"><\/span>What an MTC Can Document<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Depending on the certificate type and applicable specification, it can provide information concerning:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Material identity<\/li>\n\n\n\n<li>Applicable material specification<\/li>\n\n\n\n<li>\u5316\u5b66\u7d44\u6210<\/li>\n\n\n\n<li>\u6a5f\u68b0\u7684\u8a66\u9a13\u7d50\u679c<\/li>\n\n\n\n<li>Inspection basis<\/li>\n\n\n\n<li>Conformity with specified requirements<\/li>\n\n\n\n<li>Material traceability<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_an_MTC_Does_Not_Automatically_Guarantee\"><\/span>What an MTC Does Not Automatically Guarantee<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">An MTC does not automatically prove:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>That the material is suitable for every possible application<\/li>\n\n\n\n<li>That the material has been stored correctly after delivery<\/li>\n\n\n\n<li>That every possible surface or dimensional characteristic is acceptable<\/li>\n\n\n\n<li>That the material meets requirements that were never included in the applicable specification<\/li>\n\n\n\n<li>Performance beyond the properties and tests covered by the relevant requirements<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u7c21\u5358\u306b\u8a00\u3048\u3070\u3001, <strong>an MTC is evidence within a defined specification and inspection framework, not a universal guarantee of everything about the steel.<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Why_MTC_Requirements_Should_Be_Defined_Before_Ordering\"><\/span>Why MTC Requirements Should Be Defined Before Ordering<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The required inspection document should be established as part of the material order when certification is important.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"The_Required_Certificate_Type_Depends_on_the_Project\"><\/span>The Required Certificate Type Depends on the Project<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Not every stainless steel order automatically requires a 3.1 or 3.2 certificate.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The requirement may come from:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The product standard<\/li>\n\n\n\n<li>Customer specifications<\/li>\n\n\n\n<li>Contract requirements<\/li>\n\n\n\n<li>Project requirements<\/li>\n\n\n\n<li>Applicable industry or regulatory requirements<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">For stainless steel products covered by EN 10088-2, the inspection-document type is agreed at the enquiry and ordering stage; where no type is specified, the standard provides a default requirement for at least a 2.2 test report. <\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"The_Material_Specification_and_Certificate_Work_Together\"><\/span>The Material Specification and Certificate Work Together<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A certificate cannot be properly understood independently of the material specification.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The specification establishes <strong>what the material is required to meet<\/strong>. The inspection document provides the corresponding documentary evidence according to its defined type.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"1440\" height=\"1080\" src=\"https:\/\/www.wjlsteelsupplier.com\/wp-content\/uploads\/2026\/07\/steel-plate-packaging-weijunli-steel-supplier.webp\" alt=\"\u92fc\u677f\u306e\u68b1\u5305 - \u30a6\u30a7\u30a4\u30b8\u30e5\u30f3\u30ea\u92fc\u6750\u30b5\u30d7\u30e9\u30a4\u30e4\u30fc\" class=\"wp-image-1877\" srcset=\"https:\/\/www.wjlsteelsupplier.com\/wp-content\/uploads\/2026\/07\/steel-plate-packaging-weijunli-steel-supplier.webp 1440w, https:\/\/www.wjlsteelsupplier.com\/wp-content\/uploads\/2026\/07\/steel-plate-packaging-weijunli-steel-supplier-300x225.webp 300w, https:\/\/www.wjlsteelsupplier.com\/wp-content\/uploads\/2026\/07\/steel-plate-packaging-weijunli-steel-supplier-768x576.webp 768w, https:\/\/www.wjlsteelsupplier.com\/wp-content\/uploads\/2026\/07\/steel-plate-packaging-weijunli-steel-supplier-16x12.webp 16w, https:\/\/www.wjlsteelsupplier.com\/wp-content\/uploads\/2026\/07\/steel-plate-packaging-weijunli-steel-supplier-1200x900.webp 1200w, https:\/\/www.wjlsteelsupplier.com\/wp-content\/uploads\/2026\/07\/steel-plate-packaging-weijunli-steel-supplier-600x450.webp 600w\" sizes=\"(max-width: 1440px) 100vw, 1440px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_Weijunli_Steel_Can_Help_With_Material_Supply_and_Documentation\"><\/span>How Weijunli Steel Can Help With Material Supply and Documentation<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">For industrial steel buyers, certification is only useful when it is connected to the correct material, specification, and supply process.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Weijunli Steel is a steel supplier and processor providing <strong>stainless steel coils, sheets, plates, and strips<\/strong>, alongside other steel materials. The company states that it provides material quality support, customized processing solutions, and bulk steel supply for global customers. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This can be useful when a project requires more than standard material supply. Weijunli&#8217;s services cover processing such as <strong>cutting, slitting, laser cutting, and lamination<\/strong>, allowing material supply and downstream processing to be coordinated within one supply chain. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For buyers specifying stainless steel, the practical approach is to confirm the <strong>grade, product specification, dimensions, processing requirements, and certification requirements<\/strong> before production. Weijunli can then provide a material and processing solution aligned with the defined requirements.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"1000\" height=\"563\" src=\"https:\/\/www.wjlsteelsupplier.com\/wp-content\/uploads\/2026\/06\/automatic-coil-process-line.webp\" alt=\"automatic coil process line\" class=\"wp-image-1821\" srcset=\"https:\/\/www.wjlsteelsupplier.com\/wp-content\/uploads\/2026\/06\/automatic-coil-process-line.webp 1000w, https:\/\/www.wjlsteelsupplier.com\/wp-content\/uploads\/2026\/06\/automatic-coil-process-line-300x169.webp 300w, https:\/\/www.wjlsteelsupplier.com\/wp-content\/uploads\/2026\/06\/automatic-coil-process-line-768x432.webp 768w, https:\/\/www.wjlsteelsupplier.com\/wp-content\/uploads\/2026\/06\/automatic-coil-process-line-18x10.webp 18w, https:\/\/www.wjlsteelsupplier.com\/wp-content\/uploads\/2026\/06\/automatic-coil-process-line-600x338.webp 600w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Conclusion_What_Is_a_Stainless_Steel_Material_Test_Certificate\"><\/span>Conclusion: What Is a Stainless Steel Material Test Certificate?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A <strong>Stainless Steel Material Test Certificate<\/strong> is documentation that connects supplied steel with its material specification, relevant test information, inspection basis, and, where applicable, material traceability.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The basic relationship is:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Material specification \u2192 material identification \u2192 test information \u2192 inspection document \u2192 conformity<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">EN 10204 helps define the different inspection-document types, including <strong>2.1, 2.2, 3.1, and 3.2<\/strong>. It does not itself define the chemical or mechanical limits of every stainless steel grade; those requirements come from the applicable product specification.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For buyers, the important point is simple: an MTC provides <strong>documented evidence about the material supplied<\/strong> rather than leaving material conformity entirely to a verbal assurance.<\/p>","protected":false},"excerpt":{"rendered":"<p>A Stainless Steel Material Test Certificate (MTC) is a document that provides information about supplied steel and, depending on the document type, test results demonstrating its conformity with specified requirements. For stainless steel, an MTC may identify the material grade, applicable standard, heat or cast number, chemical composition, mechanical properties, and inspection information. The exact contents depend on the applicable product specification and inspection-document type. MTCs are commonly used to support material conformity and traceability. In international steel supply, you may also encounter terms such as Mill Test Certificate (MTC) and Mill Test Report (MTR). However, the document name alone does not tell you exactly what level of inspection or [&hellip;]<\/p>","protected":false},"author":1,"featured_media":1975,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[16],"tags":[],"class_list":["post-1972","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blogs-news"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.wjlsteelsupplier.com\/ja\/wp-json\/wp\/v2\/posts\/1972","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.wjlsteelsupplier.com\/ja\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.wjlsteelsupplier.com\/ja\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.wjlsteelsupplier.com\/ja\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.wjlsteelsupplier.com\/ja\/wp-json\/wp\/v2\/comments?post=1972"}],"version-history":[{"count":4,"href":"https:\/\/www.wjlsteelsupplier.com\/ja\/wp-json\/wp\/v2\/posts\/1972\/revisions"}],"predecessor-version":[{"id":1977,"href":"https:\/\/www.wjlsteelsupplier.com\/ja\/wp-json\/wp\/v2\/posts\/1972\/revisions\/1977"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.wjlsteelsupplier.com\/ja\/wp-json\/wp\/v2\/media\/1975"}],"wp:attachment":[{"href":"https:\/\/www.wjlsteelsupplier.com\/ja\/wp-json\/wp\/v2\/media?parent=1972"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.wjlsteelsupplier.com\/ja\/wp-json\/wp\/v2\/categories?post=1972"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.wjlsteelsupplier.com\/ja\/wp-json\/wp\/v2\/tags?post=1972"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}