{"id":9390,"date":"2025-08-03T00:20:47","date_gmt":"2025-08-02T16:20:47","guid":{"rendered":"https:\/\/aobosteel.com\/?page_id=9390"},"modified":"2026-10-14T13:29:04","modified_gmt":"2026-10-14T05:29:04","slug":"h21-tool-steel","status":"publish","type":"page","link":"https:\/\/aobosteel.com\/ko\/h21-tool-steel\/","title":{"rendered":"H21 \uacf5\uad6c\uac15 | 1.2581 | SKD7 \uacf5\uae09\uc5c5\uccb4"},"content":{"rendered":"<style id=\"aobo-steel-rebuild\" data-noptimize=\"1\">\n\/* Rebuilt tool-steel page: banner is full-bleed, the body keeps the site's normal\n   content width. 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}\n.ads2 a:hover { text-decoration: underline; }\n.ads2 ul, .ads2 ol { margin: 0 0 18px; padding-left: 22px; }\n.ads2 li { margin: 0 0 8px; }\n.ads2-cols2 { display: grid; grid-template-columns: 1fr 1fr; gap: 8px 40px; }\n.ads2-cols2 ul { margin-bottom: 0; }\n.ads2-row { display: grid; grid-template-columns: 1.05fr .95fr; gap: 36px; align-items: center; }\n.ads2-row-flip .ads2-col-i { order: -1; }\n.ads2-row .ads2-col-t > *:last-child { margin-bottom: 0; }\n.ads2-row .ads2-cta { margin-top: 16px; }\n.ads2-fig { margin: 0 0 22px; }\n.ads2-fig img { width: 100%; height: auto; display: block; }\n.ads2-gal { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin: 0 0 22px; }\n.ads2-gal .ads2-fig { margin: 0; }\n.ads2-row .ads2-fig { margin: 0; }\n.ads2-tw { margin: 0 0 22px; overflow-x: auto; }\n.ads2-t { width: 100%; border-collapse: collapse; font-size: 15px; }\n.ads2-t td, .ads2-t th { border: 1px solid #e3e7ec; padding: 11px 14px; vertical-align: top; text-align: left; }\n.ads2-t.kv td:first-child { background: #f6f8fa; font-weight: 600; color: #062a5a; width: 34%; }\n.ads2-t.data { font-size: 14.5px; }\n.ads2-t.data td, .ads2-t.data th { padding: 9px 11px; }\n.ads2-t.data thead th, .ads2-t.data tr:first-child td { background: #eef3f9; font-weight: 700; color: #062a5a; }\n.ads2-t.data tbody tr:nth-child(odd) td { background: #fbfcfd; }\n@media (max-width: 1000px) {\n  .ads2-row { grid-template-columns: 1fr; gap: 22px; }\n  .ads2-row-flip .ads2-col-i { order: 0; }\n  .ads2-cols2 { grid-template-columns: 1fr; }\n  .ads2-h1 { font-size: 30px; }\n  .ads2-hero { min-height: 340px; }\n}\n@media (max-width: 700px) {\n  .ads2-gal { grid-template-columns: 1fr; }\n  .ads2-body { padding: 32px 18px 44px; }\n  .ads2-t { font-size: 14px; }\n  .ads2-t td, .ads2-t th { padding: 9px 10px; }\n  .ads2-t.kv td:first-child { width: 42%; }\n  .ads2-tw { -webkit-overflow-scrolling: touch; }\n}\n@media (max-width: 640px) {\n  .ads2-hero-in { padding: 34px 18px 38px; }\n  .ads2-h1 { font-size: 25px; }\n  .ads2 h2 { font-size: 22px; }\n  .ads2-tag { font-size: 13px; }\n  .ads2-sub { font-size: 15px; }\n  .ads2-checks { gap: 6px 16px; }\n  .ads2-checks li { font-size: 14px; }\n  .ads2-btn { padding: 12px 24px; font-size: 15px; }\n  .ads2-sec { margin-bottom: 40px; }\n}\n<\/style>\n<div class=\"ads2\">\n<section class=\"ads2-hero\">\n  <img class=\"ads2-hero-img\" src=\"https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/05\/banner3.webp\" sizes=\"100vw\" alt=\"Bulk tool steel bar stock in the Aobo Steel warehouse\" loading=\"eager\" decoding=\"async\">\n  <div class=\"ads2-hero-ov\"><\/div>\n  <div class=\"ads2-hero-scrim\"><\/div>\n  <div class=\"ads2-hero-in\">\n    <nav class=\"ads2-crumb\"><a href=\"https:\/\/aobosteel.com\/ko\/\">\uc9d1 <\/a>&gt; <a href=\"https:\/\/aobosteel.com\/ko\/tool-steels\/\">\uacf5\uad6c\uac15 \uce74\ud0c8\ub85c\uadf8 <\/a>&gt; H21 \uacf5\uad6c\uac15<\/nav>\n    <p class=\"ads2-tag\"><em>\uc544\uc624\ubcf4 \uc2a4\ud2f8 | \uc911\uad6d\uc758 \uae00\ub85c\ubc8c \uacf5\uad6c\uac15 \uacf5\uae09\uc5c5\uccb4<\/em><\/p>\n    <h1 class=\"ads2-h1\">AISI H21 \uacf5\uad6c\uac15 | 1.2581 | SKD5 \uace0\ud145\uc2a4\ud150 \uc5f4\uac04 \uac00\uacf5\uac15<\/h1>\n    <ul class=\"ads2-checks\">\n      <li>100% UT Tested Quality Assurance | SEP 1921-82 Class D\/d Guaranteed<\/li>\n      <li>Optimized for Hot Extrusion Dies &#038; Brass Casting | Superior Heat Resistance<\/li>\n      <li>Annealed State Delivery<\/li>\n      <li>Surface: Black Scale, Turned, Mill Finish, or Polished<\/li>\n    <\/ul>\n    <div class=\"ads2-cta popmake-16052\"><a class=\"ads2-btn\" href=\"#\">H21 \uc18c\uc7ac\uc5d0 \ub300\ud55c \ube60\ub978 \ubb38\uc758<\/a><\/div>\n  <\/div>\n<\/section>\n<div class=\"ads2-body\">\n<section class=\"ads2-sec\">\n<p>H21 \uacf5\uad6c\uac15\uc740 AISI H \uadf8\ub8f9\uc73c\ub85c \ubd84\ub958\ub418\ub294 \ud145\uc2a4\ud150\uacc4 \uace0\uc628 \uac00\uacf5 \uacf5\uad6c\uac15\uc785\ub2c8\ub2e4. \uc774\ub7ec\ud55c \uc885\ub958\uc758 \uac15\uc740 \uace0\uc628 \ud658\uacbd\uc5d0\uc11c\uc758 \uacf5\uad6c \uc81c\uc791\uc5d0 \uc801\ud569\ud558\ub3c4\ub85d \uac1c\ubc1c\ub41c \ucd08\uae30 \uace0\ud569\uae08\uac15 \uc911 \ud558\ub098\uc785\ub2c8\ub2e4. <\/p>\n<\/section>\n<section class=\"ads2-sec\">\n<h2>1. H21 \uacf5\uad6c\uac15\uc758 \ud654\ud559 \uc870\uc131<\/h2>\n<p>H21\uac15\uc758 \uc131\ub2a5\uc740 \ud569\uae08 \uc6d0\uc18c\uc5d0 \uc758\ud574 \ud06c\uac8c \uc88c\uc6b0\ub429\ub2c8\ub2e4. \uc77c\ubc18\uc801\uc778 \uc870\uc131\uc740 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4.<\/p>\n<ul>\n<li><strong>\ud0c4\uc18c(C):<\/strong>\u00a00.26% \u2013 0.36% (\uacbd\ud654\uc131 \ubc0f \ub0b4\ub9c8\ubaa8\uc131 \uc81c\uacf5)<\/li>\n\n\n\n<li><strong>\ub9dd\uac04(Mn):<\/strong>\u00a00.15% \u2013 0.40% (\uacbd\ud654\uc131\uc744 \ud5a5\uc0c1\uc2dc\ud0a4\uace0, \ud0c8\uc0b0\uc81c\/\ud0c8\ud669\uc81c \uc5ed\ud560\uc744 \ud568)<\/li>\n\n\n\n<li><strong>\uc2e4\ub9ac\ucf58(Si):<\/strong>\u00a00.15% \u2013 0.50% (\uac15\ub3c4 \ubc0f \uacbd\ub3c4 \uc99d\uac00, \ud0c8\uc0b0\uc81c \uc5ed\ud560)<\/li>\n\n\n\n<li><strong>\ud06c\ub86c(Cr):<\/strong>\u00a03.00% \u2013 3.75% (\uace0\uc628 \uc0b0\ud654 \ubc0f \ubd80\uc2dd\uc5d0 \ub300\ud55c \uc800\ud56d\uc131 \ud5a5\uc0c1)<\/li>\n\n\n\n<li><strong>\ubc14\ub098\ub4d0(V):<\/strong>\u00a00.30% \u2013 0.60% (\ub2e8\ub2e8\ud55c \ud0c4\ud654\ubb3c\uc744 \ud615\uc131\ud558\uc5ec \ub0b4\ub9c8\ubaa8\uc131 \ubc0f \uace0\uc628 \uac15\ub3c4\ub97c \ud5a5\uc0c1\uc2dc\ud0b5\ub2c8\ub2e4.)<\/li>\n\n\n\n<li><strong>\ud145\uc2a4\ud150(W):<\/strong>\u00a08.50% \u2013 10.00% (\uace0\uc628 \uacbd\ub3c4, \uace0\uc628 \uac15\ub3c4 \ubc0f \ub0b4\ub9c8\ubaa8\uc131\uc758 \ud575\uc2ec \uc694\uc18c)<\/li>\n<\/ul>\n<\/section>\n<section class=\"ads2-sec\">\n<h2>2. H21 \uacf5\uad6c\uac15\uc758 \ud2b9\uc131<\/h2>\n<h3>2.1 \uacbd\ub3c4 \ubc0f \ub0b4\uc5f4\uc131<\/h3>\n<p>H21\uac15\uc740 \uc6b0\uc218\ud55c \ub0b4\uc5f4\uc131\uacfc \uace0\uc628\uc5d0\uc11c\ub3c4 \uacbd\ub3c4\ub97c \uc720\uc9c0\ud558\ub294 \ub2a5\ub825\uc73c\ub85c \uc798 \uc54c\ub824\uc838 \uc788\uc73c\uba70, \uc774\ub294 \uace0\uc628 \uc791\uc5c5 \ubd84\uc57c\uc5d0\uc11c \ub9e4\uc6b0 \uc911\uc694\ud55c \uc694\uc18c\uc785\ub2c8\ub2e4.<\/p>\n<ul>\n<li><strong>\uac15\ud654 \uacbd\ub3c4:<\/strong>\u00a0\uc624\uc2a4\ud14c\ub098\uc774\ud2b8\ud654 \ucc98\ub9ac \ud6c4 <a href=\"https:\/\/aobosteel.com\/ko\/tool-steel-tempering-chart\/\">\ub2f4\uae08\uc9c8<\/a> (\uc608: 595\u00b0C\/1100\u00b0F\uc5d0\uc11c 2\uc2dc\uac04 \ub3d9\uc548 \uc5f4\ucc98\ub9ac) \uc57d 529 HB\uc758 \uacbd\ub3c4\ub97c \uc5bb\uc744 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc5f4\ucc98\ub9ac \uc628\ub3c4\ub97c \ub192\uc774\uba74(\uc608: 650\u00b0C\/1200\u00b0F\ub85c) \uacbd\ub3c4\ub294 \uc57d 437 HB\ub85c \uac10\uc18c\ud569\ub2c8\ub2e4.<\/li>\n\n\n\n<li><strong>\uace0\uc628 \uacbd\ub3c4:<\/strong>\u00a0\uc791\ub3d9 \uc628\ub3c4\uc5d0\uc11c\ub294 \uacbd\ub3c4\uac00 \uac10\uc18c\ud569\ub2c8\ub2e4. \uc608\ub97c \ub4e4\uc5b4, \uace0\uc628\uc5d0\uc11c\uc758 \uacbd\ub3c4\ub294 595\u00b0C(1100\u00b0F)\uc5d0\uc11c \uc57d 280 HB, 650\u00b0C(1200\u00b0F)\uc5d0\uc11c \uc57d 211 HB\uc77c \uc218 \uc788\uc2b5\ub2c8\ub2e4. (\ucd08\uae30 \uc0c1\uc628 \uacbd\ub3c4 444 HB\ub97c \uae30\uc900\uc73c\ub85c \ud55c \uc77c\ubc18\uc801\uc778 \ub370\uc774\ud130\uc785\ub2c8\ub2e4.).<\/li>\n<\/ul>\n<h3>2.2 \uc778\uc131 \ubc0f \uc5f0\uc131<\/h3>\n<p>While offering good hot strength, H21\u2019s\u00a0toughness\u00a0and shock resistance are generally lower compared to chromium-based\u00a0<a href=\"https:\/\/aobosteel.com\/ko\/hot-work-tool-steels\/\">\uc5f4\uac04 \uacf5\uad6c\uac15<\/a>, \uc640 \uac19\uc740\u00a0<a href=\"https:\/\/aobosteel.com\/ko\/h11-tool-steel\/\">H11<\/a>\u00a0\ub610\ub294\u00a0<a href=\"https:\/\/aobosteel.com\/ko\/h13-tool-steel\/\">H13<\/a>. \ucda9\uaca9 \ud2b9\uc131 \ub610\ud55c H19\ubcf4\ub2e4 \ub5a8\uc5b4\uc9c0\ub294 \uac83\uc73c\ub85c \uc5ec\uaca8\uc9d1\ub2c8\ub2e4.<\/p>\n<ul>\n<li>\uc120\ud0dd\ub41c \ud15c\ud37c\ub9c1 \uc628\ub3c4\uc640 \uacbd\ud654 \ud6c4 \ub0c9\uac01 \uc18d\ub3c4(\uc608: \uc624\uc77c) <a href=\"https:\/\/aobosteel.com\/ko\/tool-steel-heat-treatment-guide\/\">\ub2f4\uae08\uc9c8 <\/a>\ub0c9\uac01 \uc18d\ub3c4\uac00 \ub290\ub9b4\uc218\ub85d \ucda9\uaca9 \uc778\uc131(\uc544\uc774\uc870\ub4dc \ub610\ub294 \uc0e4\ub974\ud53c V-\ub178\uce58 \uc2dc\ud5d8)\uc5d0 \uc0c1\ub2f9\ud55c \uc601\ud5a5\uc744 \ubbf8\uce69\ub2c8\ub2e4.<\/li>\n\n\n\n<li>\ube44\ud2c0\ub9bc \ud2b9\uc131\uc740 \ubaa9\ud45c \uacbd\ub3c4(\uc77c\ubc18\uc801\uc73c\ub85c 42~55 HRC \ubc94\uc704)\ub97c \uc5bb\uae30 \uc704\ud574 \uc0ac\uc6a9\ub418\ub294 \ud2b9\uc815 \uc5f4\ucc98\ub9ac \ub9e4\uac1c\ubcc0\uc218\uc5d0 \ub530\ub77c \ud06c\uac8c \ub2ec\ub77c\uc9c8 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/li>\n<\/ul>\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-7387b849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"810\" height=\"810\" src=\"https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/07\/H21-TOOL-STEEL.avif\" alt=\"H21 \uacf5\uad6c\uac15\" class=\"wp-image-9156\" srcset=\"https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/07\/H21-TOOL-STEEL.avif 810w, https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/07\/H21-TOOL-STEEL-300x300.avif 300w, https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/07\/H21-TOOL-STEEL-150x150.avif 150w, https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/07\/H21-TOOL-STEEL-768x768.avif 768w, https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/07\/H21-TOOL-STEEL-12x12.avif 12w\" sizes=\"auto, (max-width: 810px) 100vw, 810px\" \/><figcaption class=\"wp-element-caption\">H21 \uacf5\uad6c\uac15<\/figcaption><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"has-ast-global-color-0-color has-text-color has-link-color wp-elements-1 wp-block-paragraph\"><strong>H21 \uacf5\uad6c\uac15\uc744 \ucc3e\uace0 \uacc4\uc2ed\ub2c8\uae4c? \uc544\ub798 \uc591\uc2dd\uc744 \uc791\uc131\ud558\uc5ec \uc9c0\uae08 \ubc14\ub85c \ubb38\uc758\ud574 \uc8fc\uc138\uc694.<\/strong><\/p>\n\n\n\n<div class=\"wp-block-contact-form-7-contact-form-selector\">\n<div class=\"wpcf7 no-js\" id=\"wpcf7-f16042-o1\" lang=\"en-US\" dir=\"ltr\" data-wpcf7-id=\"16042\">\n<div class=\"screen-reader-response\"><p role=\"status\" aria-live=\"polite\" aria-atomic=\"true\"><\/p> <ul><\/ul><\/div>\n<form action=\"\/ko\/wp-json\/wp\/v2\/pages\/9390#wpcf7-f16042-o1\" method=\"post\" class=\"wpcf7-form init\" aria-label=\"\ubb38\uc758 \uc591\uc2dd\" novalidate=\"novalidate\" data-status=\"init\" data-trp-original-action=\"\/ko\/wp-json\/wp\/v2\/pages\/9390#wpcf7-f16042-o1\">\n<fieldset class=\"hidden-fields-container\"><input type=\"hidden\" name=\"_wpcf7\" value=\"16042\" \/><input type=\"hidden\" name=\"_wpcf7_version\" value=\"6.2.3\" \/><input type=\"hidden\" name=\"_wpcf7_locale\" value=\"en_US\" \/><input type=\"hidden\" name=\"_wpcf7_unit_tag\" value=\"wpcf7-f16042-o1\" \/><input type=\"hidden\" name=\"_wpcf7_container_post\" value=\"0\" \/><input type=\"hidden\" name=\"_wpcf7_posted_data_hash\" value=\"\" \/>\n<\/fieldset>\n<div class=\"wpcf7-turnstile cf-turnstile\" data-sitekey=\"0x4AAAAAAFMY32JbOfIdWijB\" data-response-field-name=\"_wpcf7_turnstile_response\"><\/div>\n\n<p><span class=\"wpcf7-form-control-wrap\" data-name=\"your-name\"><input size=\"40\" maxlength=\"400\" class=\"wpcf7-form-control wpcf7-text wpcf7-validates-as-required\" autocomplete=\"name\" aria-required=\"true\" aria-invalid=\"false\" placeholder=\"\uc774\ub984 *\" value=\"\" type=\"text\" name=\"your-name\" \/><\/span>\n<\/p>\n<p><span class=\"wpcf7-form-control-wrap\" data-name=\"your-email\"><input size=\"40\" maxlength=\"400\" class=\"wpcf7-form-control wpcf7-email wpcf7-validates-as-required wpcf7-text wpcf7-validates-as-email\" autocomplete=\"email\" aria-required=\"true\" aria-invalid=\"false\" placeholder=\"\uc774\uba54\uc77c *\" value=\"\" type=\"email\" name=\"your-email\" \/><\/span>\n<\/p>\n<p><span class=\"wpcf7-form-control-wrap\" data-name=\"your-message\"><textarea cols=\"40\" rows=\"4\" maxlength=\"2000\" class=\"wpcf7-form-control wpcf7-textarea wpcf7-validates-as-required\" aria-required=\"true\" aria-invalid=\"false\" placeholder=\"\uba54\uc2dc\uc9c0 *\" name=\"your-message\"><\/textarea><\/span>\n<\/p>\n<p><input class=\"wpcf7-form-control wpcf7-submit has-spinner\" type=\"submit\" value=\"\ubb38\uc758 \ubcf4\ub0b4\uae30\" \/>\n<\/p><p style=\"display: none !important;\" class=\"akismet-fields-container\" data-prefix=\"_wpcf7_ak_\"><label>\u0394<textarea name=\"_wpcf7_ak_hp_textarea\" cols=\"45\" rows=\"8\" maxlength=\"100\"><\/textarea><\/label><input type=\"hidden\" id=\"ak_js_1\" name=\"_wpcf7_ak_js\" value=\"222\"\/><script>\ndocument.getElementById( \"ak_js_1\" ).setAttribute( \"value\", ( new Date() ).getTime() );\n<\/script>\n<\/p><input type='hidden' class='wpcf7-pum' value='{\"closepopup\":false,\"closedelay\":0,\"openpopup\":true,\"openpopup_id\":16052}' \/><div class=\"wpcf7-response-output\" aria-hidden=\"true\"><\/div>\n<input type=\"hidden\" name=\"trp-form-language\" value=\"ko\"\/><\/form>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n\n\n\n<\/section>\n<section class=\"ads2-sec\">\n<h2>3. \uc5f4\ucc98\ub9ac<\/h2>\n<p>Achieving the optimal performance from H21 tool steel relies heavily on a precise\u00a0heat treatment\u00a0process. This procedure develops the necessary hardness, wear resistance, and toughness essential for demanding hot work applications.<\/p>\n<h3>3.1 \uc608\uc5f4<\/h3>\n<p>\uc8fc\uc694 \uacbd\ud654 \uacf5\uc815 \uc804\uc5d0 H21 \uacf5\uad6c\uac15\uc740 \uc2e0\uc911\ud558\uac8c \uc608\uc5f4\ud574\uc57c \ud569\ub2c8\ub2e4.<\/p>\n<ul>\n<li><strong>\uc628\ub3c4:<\/strong>\u00a0760~815\u00b0C(1400~1500\u00b0F)\uae4c\uc9c0 \uade0\uc77c\ud558\uac8c \uac00\uc5f4\ud558\uc2ed\uc2dc\uc624.<\/li>\n\n\n\n<li><strong>\ubaa9\uc801:<\/strong>\u00a0This crucial step minimizes thermal shock and prevents cracking, especially in components with complex shapes or varying thicknesses. Slow and even heating ensures that the temperature is evenly distributed throughout the steel, preparing it for the high temperatures of\u00a0austenitizing.<\/li>\n<\/ul>\n<h3>3.2 \uc624\uc2a4\ud14c\ub098\uc774\ud2b8\ud654(\uacbd\ud654)<\/h3>\n<p>\uc608\uc5f4 \ud6c4, \uac15\ucca0\uc744 \uc624\uc2a4\ud14c\ub098\uc774\ud2b8\ud654 \uc628\ub3c4\uae4c\uc9c0 \uc62c\ub9bd\ub2c8\ub2e4.<\/p>\n<ul>\n<li><strong>\uc628\ub3c4:<\/strong>\u00a01095~1205\u00b0C\ub85c \uac00\uc5f4\ud558\uc2ed\uc2dc\uc624.<\/li>\n\n\n\n<li><strong>\ubaa9\uc801:<\/strong>\u00a0\uc774 \ub2e8\uacc4\uc5d0\uc11c \uac15\ucca0\uc758 \ubbf8\uc138\uad6c\uc870\ub294 \uc624\uc2a4\ud14c\ub098\uc774\ud2b8\ub85c \ubcc0\ud658\ub429\ub2c8\ub2e4. \uc774\ub97c \ud1b5\ud574 \ud0c4\uc18c\uc640 \ud145\uc2a4\ud150(W), \ud06c\ub86c(Cr)\uacfc \uac19\uc740 \uc8fc\uc694 \ud569\uae08 \uc6d0\uc18c\uac00 \uad6c\uc870\uc5d0 \uc6a9\ud574\ub420 \uc218 \uc788\uc73c\uba70, \uc774\ub294 \ub0c9\uac01 \uc2dc \uacbd\ub3c4\ub97c \uc5bb\ub294 \ub370 \ud544\uc218\uc801\uc785\ub2c8\ub2e4.<\/li>\n<\/ul>\n<h4>\uc624\uc2a4\ud14c\ub098\uc774\ud2b8\ud654 \uc628\ub3c4\uc5d0\uc11c\uc758 \uc720\uc9c0<\/h4>\n<p>\uac15\ucca0\uc744 \uc624\uc2a4\ud14c\ub098\uc774\ud2b8\ud654 \uc628\ub3c4\uc5d0\uc11c \uc720\uc9c0\ud558\ub294 \uac83(\uc18c\ud0b9)\uc740 \ub9e4\uc6b0 \uc911\uc694\ud569\ub2c8\ub2e4.<\/p>\n<ul>\n<li><strong>\uc9c0\uc18d:<\/strong>\u00a0\uc77c\ubc18\uc801\uc73c\ub85c \ub2e8\uba74 \ub450\uaed8\uc5d0 \ub530\ub77c 2~5\uc2dc\uac04\uc774 \uc18c\uc694\ub429\ub2c8\ub2e4(\ub450\uaed8 1\uc778\uce58\ub2f9 1\uc2dc\uac04 \ub4f1 \ucda9\ubd84\ud55c \uc2dc\uac04\uc744 \ud655\ubcf4\ud558\uc2ed\uc2dc\uc624).<\/li>\n\n\n\n<li><strong>\ubaa9\uc801:<\/strong>\u00a0H21\uc740 \ud145\uc2a4\ud150\uacfc \ud06c\ub86c \ud568\ub7c9\uc774 \ub192\uc544 \uc548\uc815\uc801\uc778 \ud0c4\ud654\ubb3c\uc744 \ud615\uc131\ud569\ub2c8\ub2e4. \ucda9\ubd84\ud55c \uc720\uc9c0 \uc2dc\uac04\uc744 \ud1b5\ud574 \uc774\ub7ec\ud55c \ud0c4\ud654\ubb3c\uc774 \uc644\uc804\ud788 \uc6a9\ud574\ub418\uc5b4 \uc624\uc2a4\ud14c\ub098\uc774\ud2b8 \ub0b4\uc5d0 \uace0\ub974\uac8c \ubd84\ud3ec\ub418\ubbc0\ub85c \ub2f4\uae08\uc9c8\uc5d0 \uc801\ud569\ud55c \uade0\uc77c\ud55c \uad6c\uc870\ub97c \uc5bb\uc744 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/li>\n<\/ul>\n<h3>3.3 \ub2f4\uae08\uc9c8(\ub0c9\uac01)<\/h3>\n<p>\uae09\uc18d \ub0c9\uac01\uc740 \uc624\uc2a4\ud14c\ub098\uc774\ud2b8\ub97c \ub2e8\ub2e8\ud55c \ub9c8\ub974\ud150\uc0ac\uc774\ud2b8\uac15\uc73c\ub85c \ubcc0\ud658\uc2dc\ud0b5\ub2c8\ub2e4.<\/p>\n<ul>\n<li><strong>\ud589\ub3d9 \uc591\uc2dd:<\/strong>\u00a0H21\uac15\uc740 \uacf5\uae30 \ub610\ub294 \uae30\ub984 \uc18d\uc5d0\uc11c \ub2f4\uae08\uc9c8\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/li>\n\n\n\n<li><strong>\uace0\ub824 \uc0ac\ud56d:<\/strong>\u00a0H21 \uac15\uc7ac\ub294 \uacbd\ud654\uc131\uc774 \ub9e4\uc6b0 \ub192\uc544 \ub290\ub9b0 \uacf5\ub7ad\uc5d0\ub3c4 \uc27d\uac8c \uacbd\ud654\ub429\ub2c8\ub2e4. \ud2b9\ud788 \ud06c\uac70\ub098 \ubcf5\uc7a1\ud55c \ubd80\ud488\uc758 \uacbd\uc6b0, \uacf5\ub7ad\uc740 \uae09\uaca9\ud55c \uc720\ub7ad\uc5d0 \ube44\ud574 \ubcc0\ud615 \ubc0f \uade0\uc5f4 \ubc1c\uc0dd \uc704\ud5d8\uc744 \ud06c\uac8c \uc904\uc5ec\uc8fc\uae30 \ub54c\ubb38\uc5d0 \uc120\ud638\ub429\ub2c8\ub2e4. \ucd5c\ub300 \uacbd\ub3c4\ub97c \uc5bb\ub294 \uac83\uc774 \uc8fc\ub41c \ubaa9\ud45c\ub77c\uba74 \uc720\ub7ad\uc744 \uc0ac\uc6a9\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc774 \uacbd\uc6b0 \ud384\ub77c\uc774\ud2b8\ub098 \ubca0\uc774\ub098\uc774\ud2b8\uc640 \uac19\uc740 \uc5f0\uc9c8 \uc870\uc9c1\uc774 \ud615\uc131\ub418\ub294 \uac83\uc744 \ubc29\uc9c0\ud558\uae30 \uc704\ud574 \ub0c9\uac01 \uc18d\ub3c4\uac00 \ucda9\ubd84\ud788 \ube68\ub77c\uc57c \ud569\ub2c8\ub2e4.<\/li>\n<\/ul>\n<h3>3.4 \ud15c\ud37c\ub9c1<\/h3>\n<p>\ub2f4\uae08\uc9c8\ub41c H21\uac15\uc740 \ub9e4\uc6b0 \ub2e8\ub2e8\ud558\uc9c0\ub9cc \ucde8\uc131\ub3c4 \uac15\ud569\ub2c8\ub2e4. \ub530\ub77c\uc11c \ud2b9\uc131\uc744 \uac1c\uc120\ud558\uae30 \uc704\ud574\uc11c\ub294 \ud15c\ud37c\ub9c1\uc774 \ud544\uc694\ud569\ub2c8\ub2e4.<\/p>\n<ul>\n<li><strong>\uc628\ub3c4:<\/strong>\u00a0\uac15\ucca0\uc744 595~675\u00b0C\ub85c \uc7ac\uac00\uc5f4\ud558\uc2ed\uc2dc\uc624.<\/li>\n\n\n\n<li><strong>\ubaa9\uc801:<\/strong>\u00a0\ud15c\ud37c\ub9c1\uc740 \ucde8\uc131\uc744 \uac10\uc18c\uc2dc\ud0a4\uace0 \uc778\uc131\uacfc \uc5f0\uc131\uc744 \ud06c\uac8c \ud5a5\uc0c1\uc2dc\ud0a4\uba74\uc11c \uc0c1\ub2f9\ud55c \uacbd\ub3c4\ub97c \uc720\uc9c0\ud569\ub2c8\ub2e4. \uc0ac\uc6a9\ub418\ub294 \ud2b9\uc815 \uc628\ub3c4\uc640 \uc2dc\uac04\uc740 \uacbd\ub3c4\uc640 \uc778\uc131 \uc0ac\uc774\uc758 \ucd5c\uc885 \uade0\ud615\uc744 \uacb0\uc815\ud569\ub2c8\ub2e4.<\/li>\n\n\n\n<li><strong>\ub2e4\uc591\ud55c \uc131\uaca9:<\/strong>\u00a0H21\uacfc \uac19\uc740 \uace0\ud569\uae08 \uacf5\uad6c\uac15\uc758 \uacbd\uc6b0, \ub450 \ubc88 \uc774\uc0c1\uc758 \ud15c\ud37c\ub9c1 \uc0ac\uc774\ud074\uc744 \uc218\ud589\ud558\ub294 \uac83\uc774 \uc77c\ubc18\uc801\uc785\ub2c8\ub2e4. \uc774\ub294 \uad6c\uc870\uc801 \uc548\uc815\uc131\uc744 \ud655\ubcf4\ud558\uace0, \uc794\ub958 \uc624\uc2a4\ud14c\ub098\uc774\ud2b8\ub97c \ubcc0\ud0dc\uc2dc\ud0a4\uba70, 2\ucc28 \uacbd\ud654\ub97c \uc720\ub3c4\ud558\uc5ec \uace0\uc628\uc5d0\uc11c\uc758 \uc131\ub2a5\uc744 \ub354\uc6b1 \ud5a5\uc0c1\uc2dc\ud0b5\ub2c8\ub2e4.<\/li>\n<\/ul>\n<p>H21\uac15\uc758 \uacbd\ub3c4 \ubc0f \ud15c\ud37c\ub9c1 \uc628\ub3c4 \ud45c<\/p>\n<div class=\"ads2-tw\"><table class=\"ads2-t kv\"><tbody><tr><td><strong>\ud15c\ud37c\ub9c1 \uc628\ub3c4<\/strong><\/td><td><strong>\ub85d\uc6f0 C<\/strong><\/td><\/tr><tr><td>\ub2f4\uae08\uc9c8 \uc9c1\ud6c4<\/td><td>55<\/td><\/tr><tr><td>600\u00b0F\/315\u00b0C<\/td><td>51<\/td><\/tr><tr><td>700\u00b0F\/370\u00b0C<\/td><td>52<\/td><\/tr><tr><td>800\u00b0F\/425\u00b0C<\/td><td>52<\/td><\/tr><tr><td>900\u00b0F\/480\u00b0C<\/td><td>54<\/td><\/tr><tr><td>1000\u00b0F\/540\u00b0C<\/td><td>54<\/td><\/tr><tr><td>1100\u00b0F\/595\u00b0C<\/td><td>51<\/td><\/tr><tr><td>1200\u00b0F\/650\u00b0C<\/td><td>40<\/td><\/tr><tr><td>1300\u00b0F\/705\u00b0C<\/td><td>32<\/td><\/tr><\/tbody><\/table><\/div><figcaption>\uc2e4\ud5d8 \uc870\uac74: 1. \uc608\uc5f4 \uc628\ub3c4 815\u00b0C(1500\u00b0F) 2. \uacbd\ud654 \uc628\ub3c4 1160\u00b0C(2125\u00b0F) 3. \uc624\uc77c \ub610\ub294 \uc5fc \ub2f4\uae08\uc9c8 4. \ud654\ud559 \uc870\uc131: \ud0c4\uc18c 0.33%, \ub9dd\uac04 0.25%, \uaddc\uc18c 0.45%, \ud06c\ub86c 3.30%, \ubc14\ub098\ub4d0 0.45%, \ud145\uc2a4\ud150 9.15%<\/figcaption>\n<h3>3.5 \uc911\uc694\ud55c \uacf5\uc815 \uad00\ub9ac<\/h3>\n<h4>3.5.1 \ud0c8\ud0c4 \ubc29\uc9c0<\/h4>\n<p>H21 steel is prone to\u00a0decarburization, or the loss of carbon from the surface, at high heat treatment temperatures, resulting in a soft and weak surface layer.<\/p>\n<ul>\n<li><strong>\ud574\uacb0\ucc45:<\/strong>\u00a0\uc624\uc2a4\ud14c\ub098\uc774\ud2b8\ud654 \ucc98\ub9ac \uacfc\uc815\uc5d0\uc11c\ub294 \ubcf4\ud638 \uc870\uce58\uac00 \ud544\uc218\uc801\uc785\ub2c8\ub2e4. \uc5ec\uae30\uc5d0\ub294 \uc81c\uc5b4 \ubd84\uc704\uae30\ub85c, \uc5fc\uc695 \uc0ac\uc6a9 \ub610\ub294 \uc2a4\ud14c\uc778\ub9ac\uc2a4\uac15 \ud638\uc77c\uacfc \uac19\uc740 \ubcf4\ud638 \uc7ac\ub8cc\ub85c \ubd80\ud488\uc744 \uac10\uc2f8\ub294 \uac83 \ub4f1\uc774 \ud3ec\ud568\ub429\ub2c8\ub2e4.<\/li>\n<\/ul>\n<h4>3.5.2 \ub2e8\uc870 \ud6c4 \ub0c9\uac01<\/h4>\n<p>H21\uc740 \uacbd\ud654\uc131\uc774 \ub9e4\uc6b0 \ub192\uae30 \ub54c\ubb38\uc5d0 \ub2e8\uc870 \uc791\uc5c5 \uc9c1\ud6c4 \ub2e8\uc870\ud488\uc744 \ucc9c\ucc9c\ud788 \ub0c9\uac01\ud574\uc57c \ud569\ub2c8\ub2e4(\uc608: \ub178\ub0c9 \ub610\ub294 \ub2e8\uc5f4\uc7ac\uc5d0 \ubb3b\uae30).<\/p>\n<ul>\n<li><strong>\uc774\uc720:<\/strong>\u00a0\uace0\uc628\uc5d0\uc11c \uacf5\ub7ad\ud558\ub294 \ub178\uba40\ub77c\uc774\uc9d5 \uacf5\uc815\uc744 \ud53c\ud558\uc2ed\uc2dc\uc624. \uc774 \uacf5\uc815\uc740 \uac15\ucca0\uc744 \ubd80\ubd84\uc801\uc73c\ub85c \ub610\ub294 \uc644\uc804\ud788 \uacbd\ud654\uc2dc\ucf1c \uc758\ub3c4\ub41c \uacbd\ud654 \ubc0f \ud15c\ud37c\ub9c1 \uacf5\uc815 \uc804\uc5d0 \ucde8\uc131 \ubc0f \uade0\uc5f4\uc744 \uc720\ubc1c\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc11c\uc11c\ud788 \ub0c9\uac01\ud558\uba74 \ud6c4\uc18d \uc5f4\ucc98\ub9ac\uc5d0 \ub354\uc6b1 \uc801\ud569\ud55c \uad6c\uc870\ub97c \uc5bb\uc744 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/li>\n<\/ul>\n<p>H21 \uacf5\uad6c\uac15\uc758 \uc5f4\ucc98\ub9ac\uc5d0 \ub300\ud55c \uc774\ub7ec\ud55c \uccb4\uacc4\uc801\uc778 \uc811\uadfc \ubc29\uc2dd\uc740 \ud574\ub2f9 \uc18c\uc7ac\uac00 \uc758\ub3c4\ub41c \uace0\uc628 \uac00\uacf5 \uacf5\uad6c \uc6a9\ub3c4\uc5d0 \ud544\uc694\ud55c \uace0\uc131\ub2a5\uc744 \uc81c\uacf5\ud558\ub3c4\ub85d \ubcf4\uc7a5\ud569\ub2c8\ub2e4. \uac01 \ub9e4\uac1c\ubcc0\uc218\uc5d0 \ub300\ud55c \uc815\ubc00\ud55c \uc81c\uc5b4\uac00 \uc131\uacf5\uc758 \ud575\uc2ec\uc785\ub2c8\ub2e4.<\/p>\n<\/section>\n<section class=\"ads2-sec\">\n<h2>4. H21 \uacf5\uad6c\uac15\uc758 \uc801\uc6a9 \ubd84\uc57c<\/h2>\n<p>H21\uac15\uc740 \uace0\uc628 \uacbd\ub3c4\uc640 \ub0b4\ub9c8\ubaa8\uc131\uc774 \ub6f0\uc5b4\ub098 \ub2e4\uc591\ud55c \uace0\uc628 \uac00\uacf5 \uacf5\uc815\uc5d0 \uc0ac\uc6a9\ub429\ub2c8\ub2e4.<\/p>\n<ul>\n<li>\ub2e8\uc870 \uae08\ud615 \ubc0f \uc778\uc11c\ud2b8<\/li>\n\n\n\n<li>\uace0\uc628 \uc791\uc5c5\uc6a9 \ud380\uce58, \ud53c\uc5b4\uc11c \ubc0f \ub9e8\ub4dc\ub9b4<\/li>\n\n\n\n<li>\uc5f4 \uc555\ucd9c \uae08\ud615<\/li>\n\n\n\n<li>\uace0\uc628 \uc804\ub2e8 \ube14\ub808\uc774\ub4dc(\ud2b9\ud788 \uadf9\ud55c \ud658\uacbd \uc870\uac74\uc5d0 \uc801\ud569\ud558\uba70, \uacbd\uc6b0\uc5d0 \ub530\ub77c H25\uc640 \ud568\uaed8 \uc0ac\uc6a9\ub428)<\/li>\n\n\n\n<li>\ub2e4\uc774\uce90\uc2a4\ud305 \uae08\ud615 (\ud2b9\ud788 \ud669\ub3d9\uc6a9)<\/li>\n\n\n\n<li>\uc8fc\uc870\uc6a9 \uae08\ud615 (\ud2b9\ud788 \uc587\uc740 \ubd80\ubd84\uc5d0\uc11c \ub0b4\ub9c8\ubaa8\uc131\uc744 \uc5b4\ub290 \uc815\ub3c4 \ud76c\uc0dd\ud558\ub354\ub77c\ub3c4 \ud30c\uc190 \uc800\ud56d\uc131\uc744 \ud5a5\uc0c1\uc2dc\ud0ac \uc218 \uc788\ub294 \uacbd\uc6b0)<\/li>\n<\/ul>\n<p>H21\uc740 \uc911\uaddc\ubaa8 \uc0dd\uc0b0\uc744 \uc704\ud55c \ud234\ub9c1\uc5d0 \uc801\ud569\ud55c \uc120\ud0dd\uc73c\ub85c \uc5ec\uaca8\uc9c0\ub294 \uacbd\uc6b0\uac00 \ub9ce\uc2b5\ub2c8\ub2e4.<\/p>\n<\/section>\n<section class=\"ads2-sec\">\n<h2>5. H21 \uacf5\uad6c\uac15 \ub3d9\ub4f1 \ub4f1\uae09<\/h2>\n<ul>\n<li><strong>\uc720\ub7fd (EN)<\/strong>: X30WCrV9-3 (1.2581)<\/li>\n\n\n\n<li><strong>\ub3c5\uc77c(DIN)<\/strong>: 1.2581<\/li>\n\n\n\n<li><strong>\uc77c\ubcf8 (JIS)<\/strong>: SKD5<\/li>\n\n\n\n<li><strong>\ud504\ub791\uc2a4 (AFNOR)<\/strong>: 32CDV12-28<\/li>\n\n\n\n<li><strong>\uc911\uad6d(GB)<\/strong>: 3Cr2W8V<\/li>\n<\/ul>\n<div class=\"ads2-cta popmake-16052\"><a class=\"ads2-btn\" href=\"#\">\uacac\uc801 \uc694\uccad\uc11c \uc591\uc2dd \uc5f4\uae30<\/a><\/div>\n<\/section>\n\n\n<script type=\"application\/ld+json\">{\n    \"@context\": \"https:\\\/\\\/schema.org\\\/\",\n    \"@type\": \"Product\",\n    \"name\": \"Forged H21 \\\/ 1.2581 \\\/ SKD5 Tungsten Hot Work Tool Steel Round Bar\",\n    \"image\": \"https:\\\/\\\/aobosteel.com\\\/wp-content\\\/uploads\\\/2025\\\/07\\\/H21-TOOL-STEEL.avif\",\n    \"description\": \"Premium Forged H21 (1.2581 \\\/ SKD5) Tungsten Hot Work Tool Steel directly from Aobo Steel factory. Exceptional red hardness and high-temperature wear resistance. Ideal for hot extrusion dies. 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Tool Steel Catalog &gt; H21 Tool Steel Aobo Steel | Global Tool Steel Supplier in China AISI H21 Tool Steel | 1.2581 | SKD5 High Tungsten Hot Work Steel 100% UT Tested Quality Assurance | SEP 1921-82 Class D\/d Guaranteed Optimized for Hot Extrusion Dies &#038; Brass Casting | Superior Heat Resistance Annealed [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":9156,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"disabled","ast-breadcrumbs-content":"","ast-featured-img":"disabled","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"class_list":["post-9390","page","type-page","status-publish","has-post-thumbnail","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.7 (Yoast SEO v28.7) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>H21 Tool Steel | 1.2581 | SKD7 Supplier - AoboSteel<\/title>\n<meta name=\"description\" content=\"Explore H21 tool steel, a tungsten-based hot-work tool steel ideal for high-temperature applications. 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