{"id":7988,"date":"2026-08-03T10:00:00","date_gmt":"2026-08-03T02:00:00","guid":{"rendered":"https:\/\/maxtormetal.com\/?p=7988"},"modified":"2026-08-02T21:39:45","modified_gmt":"2026-08-02T13:39:45","slug":"reading-tool-steel-mtc-strip-blades-qa-checklist","status":"publish","type":"post","link":"https:\/\/maxtormetal.com\/vi\/reading-tool-steel-mtc-strip-blades-qa-checklist\/","title":{"rendered":"\u0110\u1ecdc ch\u1ee9ng ch\u1ec9 ki\u1ec3m \u0111\u1ecbnh (MTC) th\u00e9p c\u00f4ng c\u1ee5 cho dao c\u1eaft th\u00e9p d\u1ea3i: Checklist QA th\u1ef1c t\u1ebf v\u1ec1 th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc, \u0111\u1ed9 c\u1ee9ng v\u00e0 kh\u1ea3 n\u0103ng truy xu\u1ea5t ngu\u1ed3n g\u1ed1c"},"content":{"rendered":"<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/maxtormetal.com\/wp-content\/uploads\/2026\/08\/image-1024x683.jpeg\" alt=\"\u0110\u1ecdc ch\u1ee9ng ch\u1ec9 ki\u1ec3m \u0111\u1ecbnh (MTC) th\u00e9p c\u00f4ng c\u1ee5 cho dao c\u1eaft th\u00e9p d\u1ea3i: Checklist QA th\u1ef1c t\u1ebf v\u1ec1 th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc, \u0111\u1ed9 c\u1ee9ng v\u00e0 kh\u1ea3 n\u0103ng truy xu\u1ea5t ngu\u1ed3n g\u1ed1c\" class=\"wp-image-7989\" srcset=\"https:\/\/maxtormetal.com\/wp-content\/uploads\/2026\/08\/image-1024x683.jpeg 1024w, https:\/\/maxtormetal.com\/wp-content\/uploads\/2026\/08\/image-300x200.jpeg 300w, https:\/\/maxtormetal.com\/wp-content\/uploads\/2026\/08\/image-768x512.jpeg 768w, https:\/\/maxtormetal.com\/wp-content\/uploads\/2026\/08\/image-18x12.jpeg 18w, https:\/\/maxtormetal.com\/wp-content\/uploads\/2026\/08\/image-600x400.jpeg 600w, https:\/\/maxtormetal.com\/wp-content\/uploads\/2026\/08\/image.jpeg 1536w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure><p>C\u00e2u tr\u1ea3 l\u1eddi nhanh: \u0110\u1ec3 \u0111\u1ecdc MTC th\u00e9p c\u00f4ng c\u1ee5 cho dao c\u1eaft th\u00e9p d\u1ea3i, h\u00e3y b\u1eaft \u0111\u1ea7u t\u1eeb ph\u1ea7n ti\u00eau \u0111\u1ec1 \u2014 x\u00e1c minh lo\u1ea1i ch\u1ee9ng ch\u1ec9 EN 10204 3.1, th\u00f4ng tin nh\u00e0 cung c\u1ea5p, m\u00e1c th\u00e9p v\u00e0 s\u1ed1 m\u1ebb n\u1ea5u (heat number). Sau \u0111\u00f3, \u0111\u1ed1i chi\u1ebfu b\u1ea3ng th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc v\u1edbi \u0111\u01a1n \u0111\u1eb7t h\u00e0ng (PO)\/th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a b\u1ea1n (s\u1eed d\u1ee5ng ti\u00eau chu\u1ea9n ASTM A681 ho\u1eb7c ISO 4957 l\u00e0m tham chi\u1ebfu). X\u00e1c minh \u0111\u1ed9 \u0111\u1ed3ng \u0111\u1ec1u v\u1ec1 \u0111\u1ed9 c\u1ee9ng b\u1eb1ng bi\u1ec3u \u0111\u1ed3 \u0111o 9 \u0111i\u1ec3m (\u0111\u1ea7u\/gi\u1eefa\/cu\u1ed1i \u00d7 m\u00e9p\/t\u00e2m\/m\u00e9p theo ti\u00eau chu\u1ea9n ASTM E18) v\u00e0 b\u1ed5 sung ki\u1ec3m tra \u0111\u1ed9 tho\u00e1t c\u00e1c-bon (ASTM E1077) khi hi\u1ec7u su\u1ea5t c\u1ea1nh c\u1eaft l\u00e0 y\u1ebfu t\u1ed1 quy\u1ebft \u0111\u1ecbnh. S\u1ed1 m\u1ebb n\u1ea5u ph\u1ea3i li\u00ean k\u1ebft ch\u1eb7t ch\u1ebd gi\u1eefa MTC, th\u1ebb cu\u1ed9n th\u00e9p (coil tag) v\u00e0 h\u1ed3 s\u01a1 l\u00f4 h\u00e0ng n\u1ed9i b\u1ed9 c\u1ee7a b\u1ea1n \u0111\u1ec3 t\u1ea1o th\u00e0nh m\u1ed9t chu\u1ed7i truy xu\u1ea5t ngu\u1ed3n g\u1ed1c ho\u00e0n ch\u1ec9nh.<\/p><p>Trong ng\u00e0nh ch\u1ebf t\u1ea1o dao c\u1eaft th\u00e9p d\u1ea3i, ch\u1ee9ng ch\u1ec9 MTC th\u00e9p c\u00f4ng c\u1ee5 ch\u1ec9 th\u1ef1c s\u1ef1 h\u1eefu \u00edch n\u1ebfu n\u00f3 gi\u00fap b\u1ea1n \u0111\u01b0a ra quy\u1ebft \u0111\u1ecbnh nh\u1eadn h\u00e0ng nhanh ch\u00f3ng, c\u00f3 c\u01a1 s\u1edf v\u1eefng ch\u1eafc \u2014 \u0e41\u0e25\u0e30 b\u1ea1n v\u1eabn c\u00f3 th\u1ec3 ch\u1ee9ng minh kh\u1ea3 n\u0103ng truy xu\u1ea5t ngu\u1ed3n g\u1ed1c sau khi cu\u1ed9n th\u00e9p \u0111\u00e3 \u0111\u01b0\u1ee3c x\u1ea3 b\u0103ng, m\u00e0i v\u00e0 ph\u00e2n chia th\u00e0nh c\u00e1c l\u00f4 h\u00e0ng n\u1ed9i b\u1ed9. Checklist th\u1ef1c t\u1ebf n\u00e0y \u0111\u01b0\u1ee3c chu\u1ea9n b\u1ecb b\u1edfi \u0110\u1ed9i ng\u0169 Ki\u1ec3m \u0111\u1ecbnh Ch\u1ea5t l\u01b0\u1ee3ng (QA) &amp; K\u1ef9 thu\u1eadt Luy\u1ec7n kim c\u1ee7a Maxtor Metal, d\u1ef1a tr\u00ean h\u01a1n 15 n\u0103m kinh nghi\u1ec7m chuy\u00ean s\u00e2u trong s\u1ea3n xu\u1ea5t dao c\u1eaft c\u00f4ng nghi\u1ec7p, l\u1ef1a ch\u1ecdn m\u00e1c th\u00e9p theo y\u00eau c\u1ea7u v\u00e0 tu\u00e2n th\u1ee7 c\u00e1c quy tr\u00ecnh ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng nghi\u00eam ng\u1eb7t khi \u0111\u1ed3ng b\u1ed9 h\u00f3a ch\u1ee9ng t\u1eeb, g\u1eafn th\u1ebb v\u00e0 x\u00e1c minh gi\u1eefa nh\u00e0 cung c\u1ea5p v\u00e0 b\u00ean mua.<\/p><ul><li><strong>M\u1ee5c \u0111\u00edch:<\/strong>\u00a0enable fast, reliable acceptance decisions for strip blades<\/li>\n\n<li><strong>Ph\u1ea1m vi:<\/strong>\u00a0EN 10204 3.1 focus (EN 10204 3.1 certificate), heat number, chemistry, hardness uniformity<\/li>\n\n<li><strong>Standards referenced:<\/strong>\u00a0EN 10204, ASTM E18, ASTM E1077, ASTM A681\/ISO 4957<\/li>\n\n<li><strong>Why reading tool steel MTC matters to QA, uptime, and FPY<\/strong><\/li>\n\n<li><strong>How this checklist reduces retests, scrap, and downtime<\/strong><\/li><\/ul><blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p><strong>Key takeaway<\/strong>: Treat the MTC as the\u00a0starting point\u00a0for acceptance: it anchors traceability and declared results, but your receiving checks decide whether the coil is safe to process.<\/p><\/blockquote><h2 class=\"wp-block-heading\" id=\"7bfd1b68-bc26-48d8-95d1-b575d87b5242\">Ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n v\u1ec1 ch\u1ee9ng ch\u1ec9 MTC<\/h2><h3 class=\"wp-block-heading\" id=\"c73758c4-185f-4c1e-8c84-3e518a6aa73d\">What an EN 10204 3.1 covers<\/h3><p>An EN 10204 Type 3.1 inspection certificate is the common \u201cmill test certificate \/ material test certificate\u201d format used in metals supply. In simple terms, it\u2019s the manufacturer\u2019s declaration that the delivered product complies with the order, and it includes test results tied to the test unit.<\/p><p>This is the EN 10204 3.1 certificate your traceability system ultimately points back to.<\/p><p>For the formal definitions and document types, refer to EN 10204:2004 directly\u2014available through official standards bodies such as\u00a0<a href=\"https:\/\/knowledge.bsigroup.com\/products\/metallic-products-types-of-inspection-documents\" target=\"_blank\" rel=\"noreferrer noopener\"><em><strong>BSI (EN 10204:2004)<\/strong><\/em><\/a>\u00a0or your regional standards authority. The standard defines all document types (2.1, 2.2, 3.1, 3.2) and the authorization requirements for each.<\/p><p>Checklist (3.1 basics):<\/p><ul><li>Certificate type is explicitly shown as\u00a0<strong>EN 10204 3.1<\/strong>.<\/li>\n\n<li>It includes\u00a0<strong>measured results<\/strong>\u00a0(not just \u201cconforms\u201d).<\/li>\n\n<li>It is\u00a0<strong>signed\/validated<\/strong>\u00a0by the manufacturer\u2019s authorized inspection representative.<\/li><\/ul><h3 class=\"wp-block-heading\" id=\"cfcf5d9c-b79c-4757-a6ce-b5e7b628236e\">Heat number and traceability linkage<\/h3><p>For strip blades, the heat number is the shortest path to \u201cDo we know exactly what this coil is?\u201d It is the core of heat number traceability in coil-based supply. It should link:<\/p><ul><li>the MTC (declared chemistry + tests)<\/li>\n\n<li>the coil tag \/ packaging label<\/li>\n\n<li>your receiving record<\/li>\n\n<li>the internal lot numbers you create after slitting, leveling, or edge preparation<\/li><\/ul><p>Receiving checklist (traceability linkage):<\/p><ul><li>Heat number on MTC\u00a0<strong>matches<\/strong>\u00a0the heat\/heat-lot shown on the coil tag.<\/li>\n\n<li>Coil identifier (coil no., tag no., reel no.) is recorded on your receiving log.<\/li>\n\n<li>Your internal lot IDs\u00a0<strong>inherit<\/strong>\u00a0the heat number and keep it attached through WIP.<\/li><\/ul><h3 class=\"wp-block-heading\" id=\"0cd39982-e905-4699-b9e8-a52603478f23\">3.1 vs 3.2 vs 2.2<\/h3><p>Use this as a decision shortcut:<\/p><ul><li><strong>2.2<\/strong>: declaration of compliance based on non-specific inspection (good for low-risk use; limited for audits).<\/li>\n\n<li><strong>3.1<\/strong>: manufacturer-issued inspection certificate with test results (typical baseline for industrial tool steels).<\/li>\n\n<li><strong>3.2<\/strong>: inspection certificate with third-party or purchaser\u2019s representative involvement\/witnessing (use when the risk or contract demands it).<\/li><\/ul><h2 class=\"wp-block-heading\" id=\"99944525-5fb5-4db2-a50e-3444226a3eff\">\u091f\u0942\u0932 \u0938\u094d\u091f\u0940\u0932 MTC \u092a\u0930 \u0930\u0938\u093e\u092f\u0928 \u0935\u093f\u091c\u094d\u091e\u093e\u0928 \u0915\u094b \u0915\u0948\u0938\u0947 \u0938\u0924\u094d\u092f\u093e\u092a\u093f\u0924 \u0915\u0930\u0947\u0902 \u2014 \u0914\u0930 PMI \u0938\u0947 \u0906\u0917\u0947 \u0915\u092c \u091c\u093e\u0928\u093e \u0939\u0948<\/h2><div class=\"wp-block-image\"><figure class=\"aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"893\" src=\"https:\/\/maxtormetal.com\/wp-content\/uploads\/2026\/07\/coil-change.jpg\" alt=\"\u091f\u0942\u0932 \u0938\u094d\u091f\u0940\u0932 MTC \u092a\u0930 \u0930\u0938\u093e\u092f\u0928 \u0935\u093f\u091c\u094d\u091e\u093e\u0928 \u0915\u094b \u0915\u0948\u0938\u0947 \u0938\u0924\u094d\u092f\u093e\u092a\u093f\u0924 \u0915\u0930\u0947\u0902 \u2014 \u0914\u0930 PMI \u0938\u0947 \u0906\u0917\u0947 \u0915\u092c \u091c\u093e\u0928\u093e \u0939\u0948\" class=\"wp-image-7926\" style=\"width:572px;height:auto\" srcset=\"https:\/\/maxtormetal.com\/wp-content\/uploads\/2026\/07\/coil-change.jpg 1000w, https:\/\/maxtormetal.com\/wp-content\/uploads\/2026\/07\/coil-change-300x268.jpg 300w, https:\/\/maxtormetal.com\/wp-content\/uploads\/2026\/07\/coil-change-768x686.jpg 768w, https:\/\/maxtormetal.com\/wp-content\/uploads\/2026\/07\/coil-change-13x12.jpg 13w, https:\/\/maxtormetal.com\/wp-content\/uploads\/2026\/07\/coil-change-600x536.jpg 600w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><\/figure><\/div><h3 class=\"wp-block-heading\" id=\"6c955d66-bc0e-4188-b41f-7ff80729ff90\">D2\/M2\/O1 acceptance bands<\/h3><p>A tool steel MTC is not \u201cgood\u201d because it lists numbers\u2014it\u2019s good because the numbers match what you ordered.<\/p><p>Practical acceptance rule:<\/p><ul><li>Your acceptance bands should come from\u00a0<strong>your PO\/spec callout<\/strong>, typically referencing a tool-steel material standard such as\u00a0<a href=\"https:\/\/store.astm.org\/standards\/a681\" target=\"_blank\" rel=\"noreferrer noopener\"><em><strong>Ti\u00eau chu\u1ea9n ASTMA681<\/strong><\/em><\/a>\u00a0ho\u1eb7c\u00a0<a href=\"https:\/\/www.iso.org\/standard\/70646.html\" target=\"_blank\" rel=\"noreferrer noopener\"><em><strong>ISO 4957:2018<\/strong><\/em><\/a>.<\/li><\/ul><figure class=\"wp-block-table\"><table><tbody><tr><th>C\u1ea5p<\/th><th>Carbon (C)<\/th><th>Chromium (Cr)<\/th><th>Vanadium (V)<\/th><th>Molybdenum (Mo)<\/th><th>Tungsten (W)<\/th><\/tr><tr><td><strong>D2 (1.2379)<\/strong><\/td><td>1.40 \u2013 1.60%<\/td><td>11.00 \u2013 13.00%<\/td><td>0.70 \u2013 1.10%<\/td><td>0.70 \u2013 1.20%<\/td><td>\u2014<\/td><\/tr><tr><td><strong>M2 (1.3343)<\/strong><\/td><td>0.78 \u2013 1.05%<\/td><td>3.75 \u2013 4.50%<\/td><td>1.75 \u2013 2.20%<\/td><td>4.50 \u2013 5.50%<\/td><td>5.50 \u2013 6.75%<\/td><\/tr><tr><td><strong>O1 (1.2510)<\/strong><\/td><td>0.85 \u2013 1.00%<\/td><td>0.40 \u2013 0.60%<\/td><td>0.05 \u2013 0.30%<\/td><td>\u2014<\/td><td>0.40 \u2013 0.60% (optional)<\/td><\/tr><\/tbody><\/table><\/figure><p><em>Reference source: ASTM A681 \/ ISO 4957 standard chemistry composition limits.<\/em><\/p><p>Checklist (chemistry acceptance):<\/p><ul><li>Grade is stated clearly (e.g.,\u00a0<strong>D2<\/strong>,\u00a0<strong>M2<\/strong>,\u00a0<strong>O1<\/strong>) and matches the PO.<\/li>\n\n<li>Chemistry table includes the critical alloying elements for that grade.<\/li>\n\n<li>Heat number on the chemistry report matches the heat number on the certificate header.<\/li><\/ul><p>For a detailed framework on how material grade validation \u2014 including heat-treatment batch records and XRD-based retained austenite verification \u2014 is specified for blade strip steel at the incoming stage, see<a href=\"https:\/\/maxtormetal.com\/vi\/urschel-dicer-replacement-blades-440c-hrc-56-58-qa\/\" target=\"_blank\" rel=\"noreferrer noopener\">\u00a0<strong><em>Validating 440C Dicer Replacement Blades at HRC 56\u201358<\/em><\/strong><\/a>.<\/p><blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p><strong>Pro tip<\/strong>: For incoming coils intended for strip blades, set a \u201cstop the line\u201d rule for grade ambiguity (for example, ambiguous equivalents or missing grade designation). It\u2019s almost always cheaper than chasing performance scatter later.<\/p><\/blockquote><h3 class=\"wp-block-heading\" id=\"c509d33a-0f97-467c-b6d3-00f49711bd20\">PMI vs spark-OES\/ICP-OES<\/h3><p>Positive Material Identification (PMI) is often treated as a universal answer. It isn\u2019t.<\/p><ul><li>PMI\/XRF is strong for confirming\u00a0<strong>alloy family<\/strong>\u00a0and many elements, but it\u2019s limited for\u00a0<strong>carbon<\/strong>.<\/li>\n\n<li>Spark-OES and ICP-OES are typically used when you need\u00a0<strong>more complete chemistry<\/strong>, including carbon-critical acceptance decisions.<\/li><\/ul><div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"1536\" height=\"1024\" src=\"https:\/\/maxtormetal.com\/wp-content\/uploads\/2026\/08\/image-1.jpeg\" alt=\"Infographic comparing PMI\/XRF vs spark-OES vs ICP-OES for tool steel acceptance\" class=\"wp-image-7990\" srcset=\"https:\/\/maxtormetal.com\/wp-content\/uploads\/2026\/08\/image-1.jpeg 1536w, https:\/\/maxtormetal.com\/wp-content\/uploads\/2026\/08\/image-1-300x200.jpeg 300w, https:\/\/maxtormetal.com\/wp-content\/uploads\/2026\/08\/image-1-1024x683.jpeg 1024w, https:\/\/maxtormetal.com\/wp-content\/uploads\/2026\/08\/image-1-768x512.jpeg 768w, https:\/\/maxtormetal.com\/wp-content\/uploads\/2026\/08\/image-1-18x12.jpeg 18w, https:\/\/maxtormetal.com\/wp-content\/uploads\/2026\/08\/image-1-600x400.jpeg 600w\" sizes=\"(max-width: 1536px) 100vw, 1536px\" \/><\/figure><\/div><p>Checklist (use the right method):<\/p><ul><li>Use PMI\/XRF to screen: \u201cIs this broadly the correct alloy family?\u201d<\/li>\n\n<li>Use spark-OES or ICP-OES when the acceptance hinges on carbon-sensitive outcomes (hardness response, carbide network behavior), or when the contract requires lab confirmation.<\/li>\n\n<li>Document the method and instrument ID in the receiving record so results are auditable.<\/li><\/ul><h3 class=\"wp-block-heading\" id=\"7f5adb84-541f-4210-a602-2dab9e337d42\">Resolve discrepancies to PO\/spec<\/h3><p>When chemistry results conflict (MTC vs your test vs supplier re-test), the fastest way to avoid downtime is to follow a written escalation path.<\/p><p>Discrepancy-resolution checklist:<\/p><ol><li><strong>Freeze the identity<\/strong>: confirm heat number + coil tag + sample location (head\/mid\/tail).<\/li>\n\n<li><strong>Confirm the reference<\/strong>: pull the PO\/spec revision and identify which standard governs (e.g., ASTM A681 \/ ISO 4957).<\/li>\n\n<li><strong>Confirm methods<\/strong>: PMI vs OES vs ICP-OES; note detection limits and whether carbon was actually measured.<\/li>\n\n<li><strong>Re-sample intentionally<\/strong>: take a second sample from a different location and document chain-of-custody.<\/li>\n\n<li><strong>Decide action<\/strong>: accept, hold for disposition, downgrade use, or reject\u2014based on the governing spec and risk.<\/li><\/ol><h2 class=\"wp-block-heading\" id=\"88a20c1c-c718-4267-9ddd-d32d32fbbc9c\">T\u1ea1i sao \u0111\u1ed9 \u0111\u1ed3ng \u0111\u1ec1u v\u1ec1 \u0111\u1ed9 c\u1ee9ng l\u1ea1i quan tr\u1ecdng h\u01a1n gi\u00e1 tr\u1ecb trung b\u00ecnh \u2014 v\u00e0 c\u00e1ch l\u1eadp bi\u1ec3u \u0111\u1ed3 \u0111\u1ed9 c\u1ee9ng tr\u00ean th\u00e9p d\u1ea3i<\/h2><div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"1536\" height=\"1024\" src=\"https:\/\/maxtormetal.com\/wp-content\/uploads\/2026\/08\/image-2.jpeg\" alt=\"Hardness mapping diagram for strip showing edge\u2013center\u2013edge and head\/mid\/tail test points\" class=\"wp-image-7991\" srcset=\"https:\/\/maxtormetal.com\/wp-content\/uploads\/2026\/08\/image-2.jpeg 1536w, https:\/\/maxtormetal.com\/wp-content\/uploads\/2026\/08\/image-2-300x200.jpeg 300w, https:\/\/maxtormetal.com\/wp-content\/uploads\/2026\/08\/image-2-1024x683.jpeg 1024w, https:\/\/maxtormetal.com\/wp-content\/uploads\/2026\/08\/image-2-768x512.jpeg 768w, https:\/\/maxtormetal.com\/wp-content\/uploads\/2026\/08\/image-2-18x12.jpeg 18w, https:\/\/maxtormetal.com\/wp-content\/uploads\/2026\/08\/image-2-600x400.jpeg 600w\" sizes=\"(max-width: 1536px) 100vw, 1536px\" \/><\/figure><\/div><p>For Rockwell testing, cite the official method:\u00a0<a href=\"https:\/\/store.astm.org\/e0018-22.html\" target=\"_blank\" rel=\"noreferrer noopener\"><em><strong>ASTM E18 Rockwell hardness test method<\/strong><\/em><\/a>. For practical context on why thickness\/support matter, NIST\u2019s guidance is a useful companion:\u00a0<a href=\"https:\/\/www.metallurgy.nist.gov\/reports\/recommendedpractice\/SP960_5.pdf\" target=\"_blank\" rel=\"noreferrer noopener\"><em><strong>NIST Rockwell hardness recommended practice<\/strong><\/em><\/a>.<\/p><h3 class=\"wp-block-heading\" id=\"c21acb2a-cecf-4ba1-a293-3673cad1137d\">Supply condition: Annealed vs. Pre-hardened<\/h3><p>Before evaluating hardness values, clarify the delivery state on the PO\/MTC:<\/p><ul><li><strong>Annealed strip (Soft)<\/strong>: Shipped in a spheroidized annealed state for severe forming, slitting, or punching before final heat treatment.<\/li>\n\n<li><strong>Pre-hardened \/ Hardened &amp; Tempered strip<\/strong>: Delivered at working hardness for direct grinding, edging, or light slitting without subsequent full quenching.<\/li><\/ul><figure class=\"wp-block-table\"><table><tbody><tr><th>C\u1ea5p<\/th><th>Annealed State (Max Hardness)<\/th><th>Pre-hardened \/ Heat Treated State (Working Range)<\/th><\/tr><tr><td><strong>D2<\/strong><\/td><td>Max 255 HBW (~25 HRC)<\/td><td>58 \u2013 62 HRC<\/td><\/tr><tr><td><strong>M2<\/strong><\/td><td>Max 269 HBW (~27 HRC)<\/td><td>60 \u2013 65 HRC<\/td><\/tr><tr><td><strong>O1<\/strong><\/td><td>Max 229 HBW (~20 HRC)<\/td><td>56 \u2013 62 HRC<\/td><\/tr><\/tbody><\/table><\/figure><p>Mixing up delivery conditions is a common source of false rejects and false accepts \u2014 always confirm with the MTC header what condition the material is in before applying any hardness acceptance limit.<\/p><h3 class=\"wp-block-heading\" id=\"8ebd144f-16c9-4a5e-b808-c834246c3d19\">Strip sampling map: edge\u2013center\u2013edge; head\/mid\/tail<\/h3><p>Hardness scatter in strip often hides in two directions:<\/p><ul><li><strong>Across the width<\/strong>\u00a0(edge-to-edge differences from processing, decarb, or leveling)<\/li>\n\n<li><strong>Along the length<\/strong>\u00a0(head\/mid\/tail differences from heat treatment variation or coil-end effects)<\/li><\/ul><p>Checklist (minimum map that still finds problems):<\/p><ul><li>Sample at\u00a0<strong>head \/ mid \/ tail<\/strong>.<\/li>\n\n<li>At each length position, test\u00a0<strong>edge \/ center \/ edge<\/strong>.<\/li>\n\n<li>Record location IDs so a future complaint can be traced back to the zone.<\/li><\/ul><h3 class=\"wp-block-heading\" id=\"5941a4a9-4a27-4bad-b290-37e8e8401d95\">Setup validity: thickness, spacing, support<\/h3><p>A hardness number is only actionable if the test setup is valid for the strip geometry.<\/p><p>Setup checklist:<\/p><ul><li>Confirm you are using a Rockwell scale appropriate for the strip thickness.<\/li>\n\n<li>Ensure the specimen is\u00a0<strong>flat and well supported<\/strong>\u00a0on the proper anvil; avoid rocking.<\/li>\n\n<li>Keep indentations far enough from edges and from each other to avoid interaction.<\/li>\n\n<li>If your strip is thin, don\u2019t \u201csolve it\u201d by stacking layers\u2014control the method instead.<\/li><\/ul><h3 class=\"wp-block-heading\" id=\"8f83031e-2f4a-421a-9547-918d5adfa22d\">Interpret spread and actions<\/h3><p>Don\u2019t just look at the average. Look at the spread.<\/p><p>Interpretation checklist:<\/p><ul><li>If head\/mid\/tail shift together, suspect\u00a0<strong>batch heat treatment<\/strong>\u00a0ho\u1eb7c\u00a0<strong>process-window drift<\/strong>.<\/li>\n\n<li>If edges are consistently lower than center, suspect\u00a0<strong>decarburization<\/strong>\u00a0or edge conditioning effects.<\/li>\n\n<li>If one zone is off, isolate that zone in WIP routing (don\u2019t blend lots).<\/li><\/ul><p>Action checklist:<\/p><ul><li><strong>Accept<\/strong>: hardness meets PO targets and spread is within your internal control limit.<\/li>\n\n<li><strong>Hold \/ retest<\/strong>: hardness is borderline or spread suggests a localized issue.<\/li>\n\n<li><strong>Reject \/ disposition<\/strong>: hardness is out of spec, or spread indicates non-uniformity that will create FPY loss.<\/li><\/ul><h2 class=\"wp-block-heading\" id=\"bc36a373-97ee-43a4-bb09-12e4636030e6\">Hi\u1ec7n t\u01b0\u1ee3ng tho\u00e1t c\u00e1c-bon (Decarburization) v\u00e0 \u0111\u1ed9 \u0111\u1ed3ng \u0111\u1ec1u<\/h2><div class=\"wp-block-image\"><figure class=\"aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"900\" height=\"900\" src=\"https:\/\/maxtormetal.com\/wp-content\/uploads\/2026\/05\/Blade-Strip-Steel-7.11.jpg\" alt=\"Hi\u1ec7n t\u01b0\u1ee3ng tho\u00e1t c\u00e1c-bon (Decarburization) v\u00e0 \u0111\u1ed9 \u0111\u1ed3ng \u0111\u1ec1u\" class=\"wp-image-7635\" style=\"width:618px;height:auto\" srcset=\"https:\/\/maxtormetal.com\/wp-content\/uploads\/2026\/05\/Blade-Strip-Steel-7.11.jpg 900w, https:\/\/maxtormetal.com\/wp-content\/uploads\/2026\/05\/Blade-Strip-Steel-7.11-300x300.jpg 300w, https:\/\/maxtormetal.com\/wp-content\/uploads\/2026\/05\/Blade-Strip-Steel-7.11-150x150.jpg 150w, https:\/\/maxtormetal.com\/wp-content\/uploads\/2026\/05\/Blade-Strip-Steel-7.11-768x768.jpg 768w, https:\/\/maxtormetal.com\/wp-content\/uploads\/2026\/05\/Blade-Strip-Steel-7.11-12x12.jpg 12w, https:\/\/maxtormetal.com\/wp-content\/uploads\/2026\/05\/Blade-Strip-Steel-7.11-600x600.jpg 600w, https:\/\/maxtormetal.com\/wp-content\/uploads\/2026\/05\/Blade-Strip-Steel-7.11-100x100.jpg 100w\" sizes=\"(max-width: 900px) 100vw, 900px\" \/><\/figure><\/div><h3 class=\"wp-block-heading\" id=\"dd2012cb-baba-4b36-87c2-dbf22b0c200b\">Detect and measure per ASTM E1077<\/h3><p>If strip edges are soft, chip early, or don\u2019t hold a stable grind, decarburization is a prime suspect\u2014especially in thin sections where the surface zone is a larger fraction of the cross-section.<\/p><p>ASTM\u2019s method for estimating decarb depth is\u00a0<a href=\"https:\/\/store.astm.org\/e1077-14r21.html\" target=\"_blank\" rel=\"noreferrer noopener\"><em><strong>ASTM E1077\u00a0\u2014 Standard Test Methods for Estimating the Depth of Decarburization of Steel Specimens<\/strong><\/em><\/a>.<\/p><p>Checklist (what to request\/report):<\/p><ul><li>Sample location and orientation (edge vs center; head\/mid\/tail if relevant).<\/li>\n\n<li>Whether results are reported as\u00a0<strong>total<\/strong>\u00a0V\u00e0\u00a0<strong>partial<\/strong>\u00a0decarburization depth.<\/li>\n\n<li>Metallography prep and etching method (so results are comparable across labs).<\/li><\/ul><h3 class=\"wp-block-heading\" id=\"8bc226ee-9803-4375-a090-9dcc3546a376\">Impact on hardness and mitigation<\/h3><p>Decarb turns into performance scatter because it shifts the hardness profile near the working surface.<\/p><p>Impact checklist:<\/p><ul><li>Softer surface zone \u2192 faster wear, unstable edge, unpredictable grinding response.<\/li>\n\n<li>Edge zone affected \u2192 failures show up as chipping or rapid dulling even when \u201cbulk hardness\u201d looks OK.<\/li><\/ul><p>Mitigation checklist:<\/p><ul><li>Set decarb limits on the PO when the application is edge-sensitive.<\/li>\n\n<li>Control incoming verification for high-risk lots (new supplier, process change, unusual thickness).<\/li>\n\n<li>After secondary processing (slitting, grinding, heat treatment), re-verify hardness and surface condition before releasing to production.<\/li><\/ul><h2 class=\"wp-block-heading\" id=\"b7b2d05c-67a9-458c-a76e-5ea032ffa90f\">Quy tr\u00ecnh thao t\u00e1c chu\u1ea9n (SOP) v\u1ec1 t\u00e0i li\u1ec7u v\u00e0 truy xu\u1ea5t ngu\u1ed3n g\u1ed1c<\/h2><h3 class=\"wp-block-heading\" id=\"ae5bbdfb-920e-4aef-96a6-7348473b85d5\">Link MTC, coil tags, internal lots<\/h3><p>A practical SOP connects physical identity to records so you can pass audits and also troubleshoot downtime quickly.<\/p><p>Checklist (minimum traceability chain):<\/p><ul><li>Archive the MTC PDF with a filename that includes\u00a0<strong>supplier + grade + heat number<\/strong>.<\/li>\n\n<li>Photograph or scan the coil tag on receipt.<\/li>\n\n<li>Assign internal lot numbers that preserve the heat number association.<\/li><\/ul><p><strong>Ghi ch\u00fa k\u1ef9 thu\u1eadt:<\/strong>\u00a0If your traceability SOP needs to align with coil supply format specifications \u2014 including reel dimensions, lot splitting conventions, and documentation requirements \u2014 see Maxtor Metal&#8217;s reference page on\u00a0<a href=\"https:\/\/maxtormetal.com\/vi\/san-pham\/industrial-blade-strip-steel-beveled-reels\/\" target=\"_blank\" rel=\"noreferrer noopener\"><em><strong>industrial blade strip steel in beveled reels<\/strong><\/em><\/a>\u00a0for form-factor and traceability documentation standards.<\/p><p>If your traceability review also involves coil length planning and changeover scheduling, see\u00a0<a href=\"https:\/\/maxtormetal.com\/vi\/reducing-coil-change-frequency-oee-profit-gains\/\" target=\"_blank\" rel=\"noreferrer noopener\"><em><strong>OEE and Profit Gains from Reducing Coil Change Frequency<\/strong><\/em><\/a>\u00a0for the supply-side consistency controls that make longer runs reliable.<\/p><h3 class=\"wp-block-heading\" id=\"276b4b55-d17a-47b1-b7e5-8563c625f3b6\">Retest records and change control<\/h3><p>Retests are unavoidable; uncontrolled retests are expensive.<\/p><p>Checklist (retest discipline):<\/p><ul><li>Record retest triggers (what failed, where, and why you retested).<\/li>\n\n<li>Store test method, instrument, operator, and sample location.<\/li>\n\n<li>Tie retest results to a\u00a0<strong>disposition decision<\/strong>\u00a0(accept\/hold\/reject) and keep the revision history.<\/li>\n\n<li>If the PO\/spec changes, lock the revision used for acceptance of each lot.<\/li><\/ul><h3 class=\"wp-block-heading\" id=\"6d05d509-90ba-447a-8e34-5fa80c09d234\">Supplier collaboration for verification<\/h3><p>Collaboration here doesn\u2019t mean marketing\u2014it means preventing \u201cpaper-compliant, performance-unstable\u201d material from entering production.<\/p><p>Practical collaboration checklist:<\/p><ul><li>Align on what the 3.1 must include (heat no., grade\/spec callout, chemistry, hardness where applicable).<\/li>\n\n<li>Agree on a discrepancy path: who re-tests, with what method, and how chain-of-custody is documented.<\/li>\n\n<li>Lock a shared definition of \u201cequivalent grade\u201d acceptance (or forbid it unless approved).<\/li><\/ul><p><strong>Maxtor Metal<\/strong>&nbsp;provides customers with pre-aligned documentation packages \u2014 including certificate format templates, coil tag conventions, and verification record structures \u2014 so that traceability decisions remain consistent after slitting, leveling, and lot splitting. Customers running formal incoming QA programs can request the documentation alignment checklist from the Maxtor Metal technical team before the first shipment.<\/p><h3 class=\"wp-block-heading\" id=\"1ee2e0ab-8927-4a2d-8681-70775f9004bf\">Audit &amp; Re-verification Triggers<\/h3><p>To prevent quality issues from slipping into production, establish clear conditions that trigger a mandatory joint audit or secondary lab re-verification:<\/p><ul><li><strong>New Supplier \/ Subcontractor First Lot<\/strong>: Mandatory complete chemistry (OES) and 9-point hardness mapping on the initial 3 production heats.<\/li>\n\n<li><strong>Process Change Notification (PCN)<\/strong>: Any declared change in supplier annealing, heat treatment furnace, or slitting line parameters.<\/li>\n\n<li><strong>Consecutive Hardness or Microstructure Deviations<\/strong>: Occurrence of edge-to-center hardness scatter exceeding \u00b11.5 HRC across 3 consecutive coil lots.<\/li>\n\n<li><strong>Unexplained Production Tooling Failures<\/strong>: Immediate joint root-cause review if field blades exhibit premature micro-chipping or rapid edge dulling despite &#8220;paper-compliant&#8221; MTCs.<\/li><\/ul><h2 class=\"wp-block-heading\" id=\"08dfec58-74d3-4076-8243-d1f37e0d37d1\">FAQs:<\/h2><h3 class=\"wp-block-heading\" id=\"c7243bb6-4c0f-4147-98bc-61e8de394f80\">H\u1ecfi: L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 \u0111\u1ecdc nhanh MTC th\u00e9p c\u00f4ng c\u1ee5 cho dao c\u1eaft th\u00e9p d\u1ea3i?<\/h3><p>\u0110\u00e1p: B\u1eaft \u0111\u1ea7u t\u1eeb ph\u1ea7n ti\u00eau \u0111\u1ec1: x\u00e1c minh ch\u1ee9ng ch\u1ec9 EN 10204 3.1, nh\u00e0 cung c\u1ea5p, m\u00e1c th\u00e9p v\u00e0 s\u1ed1 m\u1ebb n\u1ea5u (heat number). Sau \u0111\u00f3, \u0111\u1ed1i chi\u1ebfu b\u1ea3ng th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc kh\u1edbp v\u1edbi PO\/th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt v\u00e0 s\u1ed1 m\u1ebb n\u1ea5u ph\u1ea3i li\u00ean k\u1ebft v\u1edbi th\u1ebb cu\u1ed9n th\u00e9p. Cu\u1ed1i c\u00f9ng, ki\u1ec3m ch\u1ee9ng \u0111\u1ed9 \u0111\u1ed3ng \u0111\u1ec1u v\u1ec1 \u0111\u1ed9 c\u1ee9ng b\u1eb1ng bi\u1ec3u \u0111\u1ed3 \u0111o \u0111\u01a1n gi\u1ea3n (\u0111\u1ea7u\/gi\u1eefa\/cu\u1ed1i \u00d7 m\u00e9p\/t\u00e2m\/m\u00e9p).<\/p><h3 class=\"wp-block-heading\" id=\"4161c422-50cf-4da0-8660-c1d693bcfcee\">H\u1ecfi: S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa ch\u1ee9ng ch\u1ec9 EN 10204 3.1 v\u00e0 3.2 l\u00e0 g\u00ec?<\/h3><p>\u0110\u00e1p: Ch\u1ee9ng ch\u1ec9 3.1 do nh\u00e0 s\u1ea3n xu\u1ea5t ph\u00e1t h\u00e0nh k\u00e8m theo k\u1ebft qu\u1ea3 th\u1eed nghi\u1ec7m v\u00e0 \u0111\u01b0\u1ee3c k\u00fd b\u1edfi \u0111\u1ea1i di\u1ec7n ki\u1ec3m \u0111\u1ecbnh \u0111\u01b0\u1ee3c \u1ee7y quy\u1ec1n. Ch\u1ee9ng ch\u1ec9 3.2 y\u00eau c\u1ea7u c\u00f3 th\u00eam s\u1ef1 tham gia \u0111\u1ed9c l\u1eadp (b\u00ean th\u1ee9 ba ho\u1eb7c \u0111\u1ea1i di\u1ec7n b\u00ean mua) t\u00f9y theo y\u00eau c\u1ea7u h\u1ee3p \u0111\u1ed3ng. Khi r\u1ee7i ro cao h\u01a1n ho\u1eb7c quy tr\u00ecnh ki\u1ec3m to\u00e1n\/\u0111\u00e1nh gi\u00e1 nghi\u00eam ng\u1eb7t h\u01a1n, ch\u1ee9ng ch\u1ec9 3.2 s\u1ebd \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng th\u01b0\u1eddng xuy\u00ean h\u01a1n.<\/p><h3 class=\"wp-block-heading\" id=\"9268e6bc-25a8-4074-bd9c-cfd59b2b6034\">H\u1ecfi: Ki\u1ec3m tra PMI\/XRF c\u00f3 th\u1ec3 x\u00e1c minh ch\u00ednh x\u00e1c th\u00e9p c\u00f4ng c\u1ee5 D2 ho\u1eb7c M2 kh\u00f4ng?<\/h3><p>\u0110\u00e1p: Ph\u01b0\u01a1ng ph\u00e1p PMI\/XRF r\u1ea5t h\u1eefu \u00edch \u0111\u1ec3 x\u00e1c nh\u1eadn nh\u00f3m h\u1ee3p kim v\u00e0 nhi\u1ec1u nguy\u00ean t\u1ed1 h\u1ee3p kim, nh\u01b0ng b\u1ecb gi\u1edbi h\u1ea1n \u0111\u1ed1i v\u1edbi th\u00e0nh ph\u1ea7n c\u00e1c-bon. N\u1ebfu quy\u1ebft \u0111\u1ecbnh nghi\u1ec7m thu c\u1ee7a b\u1ea1n ph\u1ee5 thu\u1ed9c v\u00e0o \u0111\u1eb7c t\u00ednh nh\u1ea1y c\u1ea3m v\u1edbi c\u00e1c-bon (\u0111\u1ed9 c\u1ee9ng, kh\u1ea3 n\u0103ng ch\u1ed1ng m\u00e0i m\u00f2n), h\u00e3y s\u1eed d\u1ee5ng spark-OES ho\u1eb7c ICP-OES theo quy tr\u00ecnh SOP c\u1ee7a b\u1ea1n.<\/p><h3 class=\"wp-block-heading\" id=\"3d4d2192-2f1a-4bad-a5d2-85ed11b09f6c\">H\u1ecfi: C\u1ea7n \u0111o bao nhi\u00eau \u0111i\u1ec3m ki\u1ec3m tra \u0111\u1ed9 c\u1ee9ng Rockwell tr\u00ean m\u1ed9t cu\u1ed9n th\u00e9p d\u1ea3i?<\/h3><p>\u0110\u00e1p: H\u00e3y s\u1eed d\u1ee5ng s\u01a1 \u0111\u1ed3 \u0111o c\u00f3 th\u1ec3 ph\u00e1t hi\u1ec7n s\u1ef1 bi\u1ebfn thi\u00ean theo c\u1ea3 chi\u1ec1u r\u1ed9ng v\u00e0 chi\u1ec1u d\u00e0i: \u0111\u1ea7u\/gi\u1eefa\/cu\u1ed1i theo chi\u1ec1u d\u00e0i cu\u1ed9n th\u00e9p, v\u00e0 m\u00e9p\/t\u00e2m\/m\u00e9p theo chi\u1ec1u r\u1ed9ng. Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y t\u1ea1o ra 9 \u0111i\u1ec3m \u0111o nh\u01b0 m\u1ed9t m\u1ee9c t\u1ed1i thi\u1ec3u th\u1ef1c t\u1ebf \u0111\u1ec3 ki\u1ec3m tra \u0111\u1ed9 \u0111\u1ed3ng \u0111\u1ec1u; h\u00e3y b\u1ed5 sung th\u00eam \u0111i\u1ec3m \u0111o n\u1ebfu l\u1ecbch s\u1eed quy tr\u00ecnh c\u1ee7a b\u1ea1n cho th\u1ea5y c\u00f3 s\u1ef1 ph\u00e2n t\u00e1n c\u1ee5c b\u1ed9.<\/p><h3 class=\"wp-block-heading\" id=\"4b7a1303-dc5f-44dd-8b44-599ff13b4bfe\">H\u1ecfi: Nguy\u00ean nh\u00e2n n\u00e0o g\u00e2y ra s\u1ef1 bi\u1ebfn thi\u00ean \u0111\u1ed9 c\u1ee9ng t\u1eeb m\u00e9p v\u00e0o t\u00e2m tr\u00ean dao c\u1eaft th\u00e9p d\u1ea3i?<\/h3><p>\u0110\u00e1p: C\u00e1c nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn bao g\u1ed3m s\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 tr\u1ea1ng th\u00e1i b\u1ec1 m\u1eb7t, hi\u1ec7n t\u01b0\u1ee3ng tho\u00e1t c\u00e1c-bon g\u1ea7n m\u00e9p v\u00e0 t\u00ednh kh\u00f4ng \u0111\u1ed3ng \u0111\u1ec1u trong qu\u00e1 tr\u00ecnh x\u1eed l\u00fd nhi\u1ec7t. D\u1ea5u hi\u1ec7u nh\u1eadn bi\u1ebft th\u01b0\u1eddng l\u00e0 \"m\u00e9p \u0111\u1ed9 c\u1ee9ng th\u1ea5p, t\u00e2m \u0111\u1ea1t chu\u1ea9n\". N\u1ebfu xu\u1ea5t hi\u1ec7n hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y, h\u00e3y b\u1ed5 sung ki\u1ec3m tra \u0111\u1ed9 tho\u00e1t c\u00e1c-bon v\u00e0 si\u1ebft ch\u1eb7t quy tr\u00ecnh ghi h\u1ed3 s\u01a1 v\u1ecb tr\u00ed l\u1ea5y m\u1eabu.<\/p><h3 class=\"wp-block-heading\" id=\"d9fbfefd-e3f6-4fd0-8c33-bd4f2ad364da\">H\u1ecfi: Ti\u00eau chu\u1ea9n ASTM E1077 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng l\u00e0m g\u00ec trong quy tr\u00ecnh QA th\u00e9p c\u00f4ng c\u1ee5?<\/h3><p>\u0110\u00e1p: Ti\u00eau chu\u1ea9n ASTM E1077 \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 \u0111\u1ed9 s\u00e2u l\u1edbp tho\u00e1t c\u00e1c-bon tr\u00ean c\u00e1c m\u1eabu th\u1eed nghi\u1ec7m th\u00e9p. Trong th\u1ef1c t\u1ebf, ti\u00eau chu\u1ea9n n\u00e0y h\u1ed7 tr\u1ee3 c\u00e1c quy\u1ebft \u0111\u1ecbnh nghi\u1ec7m thu v\u00e0 ph\u00e2n t\u00edch nguy\u00ean nh\u00e2n g\u1ed1c r\u1ec5 (root-cause) khi \u0111\u1ed9 m\u1ec1m b\u1ec1 m\u1eb7t \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t c\u1ee7a dao c\u1eaft, \u0111\u1eb7c bi\u1ec7t l\u00e0 \u1edf th\u00e9p d\u1ea3i m\u1ecfng - n\u01a1i v\u00f9ng b\u1ec1 m\u1eb7t \u0111\u00f3ng vai tr\u00f2 quy\u1ebft \u0111\u1ecbnh.<\/p><h3 class=\"wp-block-heading\" id=\"e14c86d0-f453-4386-99b6-8ac0de013969\">H\u1ecfi: T\u00f4i n\u00ean l\u00e0m g\u00ec n\u1ebfu th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc tr\u00ean MTC \u0111\u1ea1t chu\u1ea9n nh\u01b0ng ki\u1ec3m tra \u0111\u1ed9 c\u1ee9ng l\u1ea1i kh\u00f4ng \u0111\u1ea1t?<\/h3><p>\u0110\u00e1p: H\u00e3y t\u1ea1m gi\u1eef l\u00f4 h\u00e0ng v\u00e0 x\u00e1c minh t\u00ednh h\u1ee3p l\u1ec7 c\u1ee7a ph\u00e9p \u0111o tr\u01b0\u1edbc (s\u1ef1 ph\u00f9 h\u1ee3p c\u1ee7a thang \u0111o\/\u0111\u1ed9 d\u00e0y, b\u1ec7 \u0111\u1ee1, kho\u1ea3ng c\u00e1ch c\u00e1c \u0111i\u1ec3m \u0111o v\u00e0 kh\u00e2u chu\u1ea9n b\u1ecb m\u1eabu). N\u1ebfu ph\u00e9p \u0111o h\u1ee3p l\u1ec7, h\u00e3y x\u1eed l\u00fd theo quy tr\u00ecnh h\u00e0ng kh\u00f4ng ph\u00f9 h\u1ee3p (nonconformance): l\u1ea5y m\u1eabu l\u1ea1i c\u00f3 ghi h\u1ed3 s\u01a1 chu\u1ed7i cung \u1ee9ng\/b\u1ea3o qu\u1ea3n m\u1eabu (chain-of-custody), \u0111\u1ed1i chi\u1ebfu v\u1edbi y\u00eau c\u1ea7u PO\/th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt v\u00e0 \u0111\u01b0a ra quy\u1ebft \u0111\u1ecbnh x\u1eed l\u00fd l\u00f4 h\u00e0ng (ch\u1ea5p nh\u1eadn c\u00f3 \u0111i\u1ec1u ki\u1ec7n, h\u1ea1 c\u1ea5p s\u1eed d\u1ee5ng ho\u1eb7c tr\u1ea3 h\u00e0ng\/lo\u1ea1i b\u1ecf).<\/p><h3 class=\"wp-block-heading\" id=\"0db63fc9-715c-46ec-8de1-a7e98efe4c5d\">H\u1ecfi: T\u00f4i c\u00f3 c\u1ea7n x\u00e1c minh l\u1ea1i sau khi x\u1ea3 cu\u1ed9n\/c\u1eaft d\u1ea3i (slitting) ho\u1eb7c m\u00e0i (grinding) kh\u00f4ng?<\/h3><p>\u0110\u00e1p: C\u00f3, n\u1ebfu c\u00e1c c\u00f4ng \u0111o\u1ea1n \u0111\u00f3 l\u00e0m thay \u0111\u1ed5i chu\u1ed7i truy xu\u1ea5t ngu\u1ed3n g\u1ed1c (chia t\u00e1ch l\u00f4 h\u00e0ng) ho\u1eb7c l\u00e0m thay \u0111\u1ed5i b\u1ec1 m\u1eb7t l\u00e0m vi\u1ec7c. H\u00e3y x\u00e1c minh l\u1ea1i \u00edt nh\u1ea5t l\u00e0 kh\u1ea3 n\u0103ng truy xu\u1ea5t (t\u1eeb s\u1ed1 m\u1ebb n\u1ea5u sang s\u1ed1 l\u00f4 n\u1ed9i b\u1ed9) v\u00e0 \u0111\u1ed9 c\u1ee9ng\/tr\u1ea1ng th\u00e1i b\u1ec1 m\u1eb7t d\u1ef1a tr\u00ean \u0111\u00e1nh gi\u00e1 r\u1ee7i ro\u2014\u0111\u1eb7c bi\u1ec7t l\u00e0 sau khi m\u00e0i ho\u1eb7c x\u1eed l\u00fd nhi\u1ec7t.<\/p><h2 class=\"wp-block-heading\" id=\"2e0bcd01-f159-47c8-aa75-e58a951c2ea9\">K\u1ebft lu\u1eadn<\/h2><div class=\"wp-block-image\"><figure class=\"aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"900\" height=\"898\" src=\"https:\/\/maxtormetal.com\/wp-content\/uploads\/2026\/05\/Blade-Strip-Steel-5.11.jpg\" alt=\"reading tool steel MTC\" class=\"wp-image-7633\" style=\"aspect-ratio:1.5;object-fit:cover;width:700px;height:auto\" srcset=\"https:\/\/maxtormetal.com\/wp-content\/uploads\/2026\/05\/Blade-Strip-Steel-5.11.jpg 900w, https:\/\/maxtormetal.com\/wp-content\/uploads\/2026\/05\/Blade-Strip-Steel-5.11-300x300.jpg 300w, https:\/\/maxtormetal.com\/wp-content\/uploads\/2026\/05\/Blade-Strip-Steel-5.11-150x150.jpg 150w, https:\/\/maxtormetal.com\/wp-content\/uploads\/2026\/05\/Blade-Strip-Steel-5.11-768x766.jpg 768w, https:\/\/maxtormetal.com\/wp-content\/uploads\/2026\/05\/Blade-Strip-Steel-5.11-12x12.jpg 12w, https:\/\/maxtormetal.com\/wp-content\/uploads\/2026\/05\/Blade-Strip-Steel-5.11-600x599.jpg 600w, https:\/\/maxtormetal.com\/wp-content\/uploads\/2026\/05\/Blade-Strip-Steel-5.11-100x100.jpg 100w\" sizes=\"(max-width: 900px) 100vw, 900px\" \/><\/figure><\/div><p>A clean checklist is only valuable if it reduces real waste: fewer retests, fewer surprises on the grinder, and fewer unplanned stops in production. The acceptance path covered in this guide comes down to four linked checks: confirm the EN 10204 3.1 certificate is correctly issued and signed; verify chemistry against PO\/spec with the right method (PMI for screening, OES\/ICP for carbon-critical decisions); map hardness at head\/mid\/tail \u00d7 edge\/center\/edge and interpret the spread, not just the average; and verify decarburization depth when the application is edge-sensitive.<\/p><p>Traceability is what ties these checks together. If you can connect the MTC heat number to the coil tag, to your receiving log, and through to internal lot numbers after slitting or grinding\u2014you have a defensible QA record. If any link in that chain is missing, you have paperwork, not traceability. Re-verify hardness and surface condition after any secondary process (slitting, grinding, heat treatment) that changes the working surface or splits the lot identity.<\/p><p>Consistent results require consistent identity. That&#8217;s the same internal discipline we apply at&nbsp;<strong>Maxtor Metal&nbsp;<\/strong>when aligning documentation and verification steps between supplier and buyer.<\/p><hr class=\"wp-block-separator has-alpha-channel-opacity\"\/><h3 class=\"wp-block-heading\" id=\"b9411014-6743-4876-b0e0-d8f88a33a9d9\">Author Bio<\/h3><p><strong>Jesse Xu<\/strong><br><em>Senior Quality Engineer | Maxtor Metal (QA Department)<\/em><\/p><p>Jesse Xu is a Senior Quality Engineer at Maxtor Metal with over 15 years of hands-on experience in tool steel metallurgical quality assurance, material inspection, and failure analysis. Specializing in diagnosing complex blade performance issues\u2014such as distinguishing heat treatment defects from material segregation in chipping and premature wear\u2014he helps global equipment manufacturers ensure total quality from raw material receiving to finished precision cutting tools. Jesse holds prestigious industry credentials, including&nbsp;<strong>ASQ CQE<\/strong>&nbsp;(Certified Quality Engineer),&nbsp;<strong>Chuy\u00ean gia \u0111\u00e1nh gi\u00e1 tr\u01b0\u1edfng ISO 9001<\/strong>, V\u00e0&nbsp;<strong>ASNT C\u1ea5p \u0111\u1ed9 II<\/strong>&nbsp;certifications.<\/p>","protected":false},"excerpt":{"rendered":"<p>Quick Answer: To read a tool steel MTC for strip blades, start at the header \u2014 confirm EN 10204 3.1 certificate type, supplier identity, steel grade, and heat number. Then cross-check the chemistry table against your PO\/spec (using ASTM A681 or ISO 4957 as the reference standard). Verify hardness uniformity with a 9-point map (head\/mid\/tail [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":7989,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1274,1],"tags":[1287,1288],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v23.6 (Yoast SEO v23.6) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Reading Tool Steel MTC: Strip Blade QA Checklist<\/title>\n<meta name=\"description\" content=\"Read tool steel MTC for strip blades: verify EN 10204 3.1, heat number traceability, chemistry bands, hardness map, decarb per ASTM E18\/E1077\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/maxtormetal.com\/vi\/reading-tool-steel-mtc-strip-blades-qa-checklist\/\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Reading Tool Steel MTC for Strip Blades: A Practical QA Checklist for Chemistry, Hardness, and Traceability\" \/>\n<meta property=\"og:description\" content=\"Read tool steel MTC for strip blades: verify EN 10204 3.1, heat number traceability, chemistry bands, hardness map, decarb per ASTM E18\/E1077\" \/>\n<meta property=\"og:url\" content=\"https:\/\/maxtormetal.com\/vi\/reading-tool-steel-mtc-strip-blades-qa-checklist\/\" \/>\n<meta property=\"og:site_name\" content=\"Maxtor Metal | Custom Industrial Blade Manufacturer &amp; 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