{"id":9452,"date":"2025-08-03T17:26:33","date_gmt":"2025-08-03T09:26:33","guid":{"rendered":"https:\/\/aobosteel.com\/?page_id=9452"},"modified":"2026-04-26T00:15:40","modified_gmt":"2026-04-25T16:15:40","slug":"o1-tool-steel","status":"publish","type":"page","link":"https:\/\/aobosteel.com\/ko\/o1-tool-steel\/","title":{"rendered":"O1 Tool Steel | 1.2510 | SKS3"},"content":{"rendered":"<div class=\"wp-block-cover alignfull\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"337\" class=\"wp-block-cover__image-background wp-image-7233 size-large\" alt=\"\" src=\"https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/05\/banner3-1024x337.webp\" data-object-fit=\"cover\" srcset=\"https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/05\/banner3-1024x337.webp 1024w, https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/05\/banner3-300x99.webp 300w, https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/05\/banner3-768x253.webp 768w, https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/05\/banner3-1536x506.webp 1536w, https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/05\/banner3-18x6.webp 18w, https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/05\/banner3.webp 1920w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><span aria-hidden=\"true\" class=\"wp-block-cover__background has-background-dim\" style=\"background-color:#4e4b40\"><\/span><div class=\"wp-block-cover__inner-container is-layout-constrained wp-block-cover-is-layout-constrained\">\n<div class=\"wp-block-uagb-container uagb-block-29fc5c3c alignfull uagb-is-root-container\"><div class=\"uagb-container-inner-blocks-wrap\">\n<div class=\"wp-block-uagb-advanced-heading uagb-block-c196a237\"><h6 class=\"uagb-heading-text\"><a href=\"https:\/\/aobosteel.com\/ko\/\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-ast-global-color-1-color\">Home<\/mark> <\/a>&gt; <a href=\"https:\/\/aobosteel.com\/ko\/tool-steels\/\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-ast-global-color-1-color\">Tool Steel Catalog<\/mark><u> <\/u><\/a>&gt; O1 Tool Steel<\/h6><\/div>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-d1ce38c5\"><h5 class=\"uagb-heading-text\"><em>Aobo Steel | Global Tool Steel Supplier in China<\/em><\/h5><\/div>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-5b6189ba\"><h2 class=\"uagb-heading-text\">AISI O1 Tool Steel | 1.2510 | SKS3<br>Oil-Hardening Cold Work Steel for Bulk Supply<\/h2><\/div>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-914bcd03\"><h5 class=\"uagb-heading-text\">\u2713100% UT Tested Quality Assurance<\/h5><\/div>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-84cd4af9\"><h5 class=\"uagb-heading-text\">\u2713SEP 1921-82 Class D\/d Guaranteed<\/h5><\/div>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-20e20150\"><h5 class=\"uagb-heading-text\">\u2713Annealed State Delivery<\/h5><\/div>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-33ee52f8\"><h5 class=\"uagb-heading-text\">\u2713Surface: Black Scale, Turned, Mill Finish, or Polished<\/h5><\/div>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button hs-cta-trigger-button hs-cta-trigger-button-230288465624\"><a class=\"wp-block-button__link wp-element-button\">Quick Inquiry For O1 Material<\/a><\/div>\n\n\n\n<div class=\"wp-block-button hs-cta-trigger-button hs-cta-trigger-button-230288465624 is-style-outline is-style-outline--1\"><a class=\"wp-block-button__link has-ast-global-color-4-color has-text-color has-background has-link-color wp-element-button\" href=\"https:\/\/aobosteel.com\/ko\/distributors\/\" style=\"background-color:#ffffff00\">Explore Our Distrubutor Supply Structure<\/a><\/div>\n<\/div>\n<\/div><\/div>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-uagb-container uagb-block-801df516 alignfull uagb-is-root-container\"><div class=\"uagb-container-inner-blocks-wrap\">\n<p class=\"wp-block-paragraph\" id=\"h-\">O1 tool steel is a low-alloy cold-worked tool steel. It has a certain degree of hardenability and wear resistance, with minimal quenching deformation. The carbide distribution is uniform, and the particles are fine. Manufacturers typically use tool steel O1 to produce cold-punching dies with small cross-sections, complex shapes, and various gauges, as well as measuring tools. The equivalent grades of O1 are\u00a0DIN 1.2510\u00a0(Germany),\u00a0JIS SKS3\u00a0(Japan),\u00a0and GB\u00a0<em>9CrWMn\u00a0<\/em>(China).<\/p>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-uagb-container uagb-block-3dbc9d4b alignfull uagb-is-root-container\"><div class=\"uagb-container-inner-blocks-wrap\">\n<h2 class=\"wp-block-heading\" id=\"h-supply-overview\">Supply Overview<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td>Grade<\/td><td>AISI O1 \/ DIN 1.2510 \/ JIS SKS3<\/td><\/tr><tr><td>Delivery Condition<\/td><td>Fully Annealed (Soft Condition for Machining)<\/td><\/tr><tr><td>Available Forms<\/td><td>Round Bar \/ Flat Bar \/ Plate \/ Forged Block<\/td><\/tr><tr><td>Monthly Supply Capacity<\/td><td>Stable bulk supply via integrated partner mills (container-level export)<\/td><\/tr><tr><td>Recommended Export Quantity<\/td><td>Full 20GP container (~26 tons)<\/td><\/tr><tr><td>MOQ<\/td><td>5 tons<\/td><\/tr><tr><td>Lead Time (With Stock)<\/td><td>Approx. 15\u201325 days<\/td><\/tr><tr><td>Lead Time (Fresh Melt)<\/td><td>30\u201345 days<\/td><\/tr><tr><td>Lead Time (Special Route \/ Higher Cleanliness)<\/td><td>Approx. 45\u201360 days (upon request)<\/td><\/tr><tr><td>Inspection<\/td><td>In-house UT + Third-party inspection available<\/td><\/tr><tr><td>Documentation<\/td><td>MTC (EN 10204 3.1) + UT Report (if UT is required)<\/td><\/tr><\/tbody><\/table><\/figure>\n\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-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\n<h2 class=\"wp-block-heading\" id=\"h-production-stability\">Production Stability<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Stable bulk supply for distributor replenishment (MOQ 5 tons)<\/li>\n\n\n\n<li>Annealed-state delivery for reliable machining and scheduling<\/li>\n\n\n\n<li>Flexible production routing for different section sizes<\/li>\n\n\n\n<li>Stable alloy sourcing to reduce supply interruption risk<\/li>\n\n\n\n<li>Full batch traceability linked to the original heat number<\/li>\n<\/ul>\n\n\n\n<div class=\"wp-block-buttons is-content-justification-center is-layout-flex wp-container-core-buttons-is-layout-3e41869c wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button has-custom-width wp-block-button__width-100 hs-cta-trigger-button hs-cta-trigger-button-230288465624\"><a class=\"wp-block-button__link wp-element-button\">Request O1 Bulk Pricing<\/a><\/div>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/02\/IMG_20171115_153016-1024x576.avif\" alt=\"\" class=\"wp-image-12933\" srcset=\"https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/02\/IMG_20171115_153016-1024x576.avif 1024w, https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/02\/IMG_20171115_153016-300x169.avif 300w, https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/02\/IMG_20171115_153016-768x432.avif 768w, https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/02\/IMG_20171115_153016-1536x864.avif 1536w, https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/02\/IMG_20171115_153016-18x10.avif 18w, https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/02\/IMG_20171115_153016.avif 1860w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/div>\n<\/div>\n\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=\"1000\" height=\"750\" src=\"https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/02\/photobank-2.avif\" alt=\"\" class=\"wp-image-12935\" srcset=\"https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/02\/photobank-2.avif 1000w, https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/02\/photobank-2-300x225.avif 300w, https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/02\/photobank-2-768x576.avif 768w, https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/02\/photobank-2-16x12.avif 16w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\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-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\n<h2 class=\"wp-block-heading\" id=\"h-packaging-and-shipping\">Packaging and Shipping<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Seaworthy export packing for long sea transit<\/li>\n\n\n\n<li>20GP loading optimized up to ~26 tons<\/li>\n\n\n\n<li>Mixed sizes supported for stocking orders<\/li>\n\n\n\n<li>Anti-rust protection available upon request<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"h-\">For international orders, full container loading is recommended for better freight efficiency and smoother customs clearance.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"h-\"><\/p>\n\n\n\n<div class=\"wp-block-buttons is-content-justification-center is-layout-flex wp-container-core-buttons-is-layout-3e41869c wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button has-custom-width wp-block-button__width-100 hs-cta-trigger-button hs-cta-trigger-button-230288465624\"><a class=\"wp-block-button__link wp-element-button\">Get O1 Full Container Quote<\/a><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-uagb-container uagb-block-014c51a7 alignfull uagb-is-root-container\"><div class=\"uagb-container-inner-blocks-wrap\">\n<div class=\"wp-block-uagb-container uagb-block-b959c99c alignfull uagb-is-root-container\"><div class=\"uagb-container-inner-blocks-wrap\">\n<div class=\"wp-block-uagb-call-to-action uagb-block-5e88b53d wp-block-button\"><div class=\"uagb-cta__wrap\"><h3 class=\"uagb-cta__title\">Quality Assurance for Bulk Orders<\/h3><p class=\"uagb-cta__desc\">For distributors and stockists, consistency and traceability matter. See how Aobo Steel verifies chemistry, microstructure, UT (upon request), delivered hardness, and batch traceability before shipment.<br><a href=\"https:\/\/web-sandbox.oaiusercontent.com\/tool-steel-quality-verification\/\"><\/a><\/p><\/div><div class=\"uagb-cta__buttons\"><a href=\"https:\/\/aobosteel.com\/ko\/tool-steel-quality-verification\/\" class=\"uagb-cta__button-link-wrapper wp-block-button__link\" target=\"_self\" rel=\"noopener noreferrer\">View Quality Verification Guide<svg xmlns=\"https:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 512 512\"><path d=\"M504.3 273.6l-112.1 104c-6.992 6.484-17.18 8.218-25.94 4.406c-8.758-3.812-14.42-12.45-14.42-21.1L351.9 288H32C14.33 288 .0002 273.7 .0002 255.1S14.33 224 32 224h319.9l0-72c0-9.547 5.66-18.19 14.42-22c8.754-3.809 18.95-2.075 25.94 4.41l112.1 104C514.6 247.9 514.6 264.1 504.3 273.6z\"><\/path><\/svg><\/a><\/div><\/div>\n<\/div><\/div>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-uagb-container uagb-block-c9c72e2b alignfull uagb-is-root-container\"><div class=\"uagb-container-inner-blocks-wrap\">\n<h2 class=\"wp-block-heading\" id=\"h-aisi-a2-tool-steel-1-2363-skd12-gallery\">AISI A2 Tool Steel | 1.2363 | SKD12 Gallery<\/h2>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-2 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"500\" data-id=\"5700\" src=\"https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/04\/o1-steel.avif\" alt=\"o1 tool steel\" class=\"wp-image-5700\" srcset=\"https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/04\/o1-steel.avif 500w, https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/04\/o1-steel-300x300.avif 300w, https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/04\/o1-steel-150x150.avif 150w, https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/04\/o1-steel-12x12.avif 12w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><figcaption class=\"wp-element-caption\">O1 tool steel round bars<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"500\" data-id=\"8822\" src=\"https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/06\/O1-steel-round-bar.webp\" alt=\"O1 steel round bar\" class=\"wp-image-8822\" srcset=\"https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/06\/O1-steel-round-bar.webp 500w, https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/06\/O1-steel-round-bar-300x300.webp 300w, https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/06\/O1-steel-round-bar-150x150.webp 150w, https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/06\/O1-steel-round-bar-12x12.webp 12w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><figcaption class=\"wp-element-caption\">O1 tool steel<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"600\" data-id=\"8821\" src=\"https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/06\/o1-steel-flat.webp\" alt=\"o1 steel flat bar\" class=\"wp-image-8821\" srcset=\"https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/06\/o1-steel-flat.webp 600w, https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/06\/o1-steel-flat-300x300.webp 300w, https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/06\/o1-steel-flat-150x150.webp 150w, https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/06\/o1-steel-flat-12x12.webp 12w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><figcaption class=\"wp-element-caption\">O1 tool steel plates<\/figcaption><\/figure>\n<\/figure>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-uagb-container uagb-block-1496f9d8 alignfull uagb-is-root-container\"><div class=\"uagb-container-inner-blocks-wrap\">\n<h2 class=\"wp-block-heading\" id=\"1-eael-table-of-content\">Applications<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Dies &amp; Punches: Blanking dies, Coining dies, Drawing dies, Forming dies, General Stamping (punches &amp; dies for short\/moderate runs), Thread-rolling dies, Cold-trimming dies<\/li>\n\n\n\n<li>Cutting &amp; Machining Tools: General shop tool bits (economical choice), Shear blades (especially smaller ones), Taps, Reamers, Hobs, Slitting saws, Circular cutters, Drills<\/li>\n\n\n\n<li>Molds &amp; Precision Parts:&nbsp;Plastic mold components (inserted cavities, master hubs), Gauges, Master tools<\/li>\n\n\n\n<li>General Tooling &amp; Wear Parts:&nbsp;Cams, Bushings, Guides, Plain sliding bearings, Cam followers, Burnishing tools, Knurling tools, Feed rolls, Roll forming tooling (moderate runs)<\/li>\n<\/ul>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-uagb-container uagb-block-83b0bc5d alignfull uagb-is-root-container\"><div class=\"uagb-container-inner-blocks-wrap\">\n<h2 class=\"wp-block-heading\" id=\"2-eael-table-of-content\">O1 Steel and Its Equivalent Grades&#8217; Composition<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td>C<\/td><td>Mn<\/td><td>Si<\/td><td>Cr<\/td><td>W<\/td><td>V<\/td><td>Ni<\/td><td>Mo<\/td><td>P<\/td><td>S<\/td><\/tr><tr><td>0.85 \u2013 1.00%<\/td><td>1.00 \u2013 1.40%<\/td><td>Max 0.50%<\/td><td>0.40 \u2013 0.60%<\/td><td>0.40 \u2013 0.60%<\/td><td>Max 0.30%<\/td><td>Max 0.30%<\/td><td>Max 0.30%<\/td><td>Max 0.03%<\/td><td>Max 0.03%<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">The O1 tool steel equivalent grades&#8217; composition<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><td>Grade<\/td><td>Standard<\/td><td>C (%)<\/td><td>Si (%)<\/td><td>Mn (%)<\/td><td>Cr (%)<\/td><td>W (%)<\/td><td>V (%)<\/td><\/tr><\/thead><tbody><tr><td>1.2510<\/td><td>DIN<\/td><td>0.90-1.05<\/td><td>0.15-0.35<\/td><td>1.00-1.20<\/td><td>0.50-0.70<\/td><td>0.50-0.70<\/td><td>0.05-0.15<\/td><\/tr><tr><td>SKS3<\/td><td>JIS<\/td><td>0.90-1.00<\/td><td>\u22640.35<\/td><td>0.90-1.20<\/td><td>0.50-1.00<\/td><td>0.50-1.00<\/td><td>&#8211;<\/td><\/tr><tr><td>9CrWMn<\/td><td>GB<\/td><td>0.85-0.95<\/td><td>\u22640.40<\/td><td>0.90-1.20<\/td><td>0.50-0.80<\/td><td>0.50-0.80<\/td><td>&#8211;<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">All O1 materials are produced in strict accordance with the specified chemical composition requirements of AISI O1, DIN 1.2510, and JIS SKS3 standards.<\/p>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-uagb-container uagb-block-5a7fbeff alignfull uagb-is-root-container\"><div class=\"uagb-container-inner-blocks-wrap\">\n<h2 class=\"wp-block-heading\" id=\"3-eael-table-of-content\">Properties<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Strength (Tensile and Yield):\u00a0Tool steel O1 exhibits a\u00a0tensile strength of 846 MPa and a 0.2% Offset Yield Strength of 829 MPa, with a general yield strength of 758 MPa. For a specific O1 composition, tensile strength can reach 1725 MPa (250 ksi) when tempered at 800\u00b0F (425\u00b0C), decreasing with higher tempering temperatures.<\/li>\n\n\n\n<li>Ductility and Toughness:\u00a0O1 steel exhibits noticeable necking before fracture, with a substantial area reduction at fracture of nearly 20%. Its fracture surface typically displays a cup\u2013cone mode. While generally medium-tough, it shows superior impact strength compared to other O-type steels within the common working hardness range of 57 to 64 HRC. Ductility usually increases with increasing tempering temperature.<\/li>\n\n\n\n<li>Modulus of Elasticity:&nbsp;211 GPa.<\/li>\n\n\n\n<li>Dimensional Stability:&nbsp;Good&nbsp;dimensional stability during heat treatment. When oil-quenched from the correct hardening temperature, it typically expands by about 0.0015 inches per inch (0.0015 mm\/mm). However, factors like part geometry and distortion (bending, bowing, or twisting) can influence the final dimensional changes.<\/li>\n\n\n\n<li>Machinability:\u00a0Very good\u00a0machinability. If the machinability of steel with 1% carbon content is set at 100, the machinability of O1 steel is 90.<\/li>\n<\/ul>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-uagb-container uagb-block-c59dd2c0 alignfull uagb-is-root-container\"><div class=\"uagb-container-inner-blocks-wrap\">\n<h2 class=\"wp-block-heading\" id=\"h-o1-heat-treatment-overview\">O1 Heat Treatment Overview<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">O1 is an oil-hardening cold work tool steel supplied in the fully annealed condition. Proper heat treatment is required to achieve its typical working hardness and dimensional stability.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Typical Heat Treatment Parameters (Reference)<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Process Step<\/th><th>Typical Temperature<\/th><th>Notes<\/th><\/tr><\/thead><tbody><tr><td>Preheating<\/td><td>600\u2013650\u00b0C (1110\u20131200\u00b0F)<\/td><td>Equalize temperature, reduce thermal shock<\/td><\/tr><tr><td>Austenitizing<\/td><td>800\u2013820\u00b0C (1470\u20131500\u00b0F)<\/td><td>Soak ~5 min per inch (25 mm) section<\/td><\/tr><tr><td>Quenching<\/td><td>Oil<\/td><td>Quench to 50\u201365\u00b0C (120\u2013150\u00b0F) before tempering<\/td><\/tr><tr><td>Tempering<\/td><td>150\u2013200\u00b0C (300\u2013390\u00b0F)<\/td><td>2 hours per inch (25 mm) section<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Typical Achievable Hardness<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>As-quenched: 62\u201364 HRC<\/li>\n\n\n\n<li>After tempering: 57\u201362 HRC<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"h-\">Hardness will vary depending on section size and tempering temperature.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">O1 is less distortion-sensitive than water-hardening grades but requires controlled oil quenching to minimize the risk of cracking. Double tempering may be recommended for improved dimensional stability in precision tooling applications.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For full heat treatment curves, soaking calculations, tempering response charts, and metallurgical explanation, please refer to: <a href=\"https:\/\/aobosteel.com\/ko\/o1-tool-steel\/\">Complete O1 Heat Treatment Guide<\/a><\/p>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-uagb-container uagb-block-ed39d3ad alignfull uagb-is-root-container\"><div class=\"uagb-container-inner-blocks-wrap\">\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button has-custom-width wp-block-button__width-100 hs-cta-trigger-button hs-cta-trigger-button-230288465624\"><a class=\"wp-block-button__link wp-element-button\">Open RFQ Form<\/a><\/div>\n<\/div>\n<\/div><\/div>\n\n\n\n<script type=\"application\/ld+json\">{\n    \"@context\": \"https:\\\/\\\/schema.org\\\/\",\n    \"@type\": \"Product\",\n    \"name\": \"Forged O1 \\\/ 1.2510 \\\/ SKS3 Tool Steel Round Bar\",\n    \"image\": \"https:\\\/\\\/aobosteel.com\\\/wp-content\\\/uploads\\\/2025\\\/04\\\/o1-steel.avif\",\n    \"description\": \"Premium Forged O1 (1.2510 \\\/ SKS3) Oil Hardening Tool Steel directly from Aobo Steel factory. Excellent non-deforming properties and wear resistance. Custom forged sizes available. Manufacturer price.\",\n    \"brand\": {\n        \"@type\": \"Brand\",\n        \"name\": \"Aobo Steel\"\n    },\n    \"manufacturer\": {\n        \"@type\": \"Organization\",\n        \"name\": \"Aobo Steel\"\n    },\n    \"sku\": \"AOBO-O1-Round\",\n    \"mpn\": \"AOBO-O1-MFG\",\n    \"offers\": {\n        \"@type\": \"AggregateOffer\",\n        \"url\": \"https:\\\/\\\/aobosteel.com\\\/o1-tool-steel\\\/\",\n        \"priceCurrency\": \"USD\",\n        \"lowPrice\": \"1100\",\n        \"highPrice\": \"1400\",\n        \"offerCount\": \"5\",\n        \"availability\": \"https:\\\/\\\/schema.org\\\/InStock\",\n        \"itemCondition\": \"https:\\\/\\\/schema.org\\\/NewCondition\",\n        \"seller\": {\n            \"@type\": \"Organization\",\n            \"name\": \"Aobo Steel\",\n            \"telephone\": \"+86 180 6294 5370\",\n            \"address\": {\n                \"@type\": \"PostalAddress\",\n                \"streetAddress\": \"No. 141 Huangjiawan, Shileishan Village, Xisai District\",\n                \"addressLocality\": \"Huangshi City\",\n                \"addressRegion\": \"Hubei Province\",\n                \"postalCode\": \"435000\",\n                \"addressCountry\": \"CN\"\n            }\n        }\n    }\n}<\/script>","protected":false},"excerpt":{"rendered":"<p>O1 tool steel is a low-alloy cold-worked tool steel. It has a certain degree of hardenability and wear resistance, with minimal quenching deformation. The carbide distribution is uniform, and the particles are fine. Manufacturers typically use tool steel O1 to produce cold-punching dies with small cross-sections, complex shapes, and various gauges, as well as measuring [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":5700,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"content-type":"landing-page","_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":"set","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-9452","page","type-page","status-publish","has-post-thumbnail","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.7 (Yoast SEO v27.7) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>O1 Tool Steel Supplier | 1.2510 | SKS3 Bulk Supply | AoboSteel<\/title>\n<meta name=\"description\" content=\"Bulk supply of O1 tool steel (1.2510 \/ SKS3) in annealed condition. Round bar and plate available. UT inspection, MTC 3.1, 20GP container export supported.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/aobosteel.com\/ko\/o1-tool-steel\/\" \/>\n<meta property=\"og:locale\" content=\"ko_KR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"O1 Tool Steel | 1.2510 | SKS3\" \/>\n<meta property=\"og:description\" content=\"Bulk supply of O1 tool steel (1.2510 \/ SKS3) in annealed condition. Round bar and plate available. UT inspection, MTC 3.1, 20GP container export supported.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/aobosteel.com\/ko\/o1-tool-steel\/\" \/>\n<meta property=\"og:site_name\" content=\"AoboSteel\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/profile.php?id=61565368220197\" \/>\n<meta property=\"article:modified_time\" content=\"2026-04-25T16:15:40+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/04\/o1-steel.avif\" \/>\n\t<meta property=\"og:image:width\" content=\"500\" \/>\n\t<meta property=\"og:image:height\" content=\"500\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\uc608\uc0c1 \ub418\ub294 \ud310\ub3c5 \uc2dc\uac04\" \/>\n\t<meta name=\"twitter:data1\" content=\"11\ubd84\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"TechArticle\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/o1-tool-steel\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/aobosteel.com\\\/o1-tool-steel\\\/\"},\"author\":{\"name\":\"Evan\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/#\\\/schema\\\/person\\\/96118415c30ca6bb52eaf1127b052ef7\"},\"headline\":\"O1 Tool Steel | 1.2510 | SKS3\",\"datePublished\":\"2025-08-03T09:26:33+00:00\",\"dateModified\":\"2026-04-25T16:15:40+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/aobosteel.com\\\/o1-tool-steel\\\/\"},\"wordCount\":821,\"publisher\":{\"@id\":\"https:\\\/\\\/aobosteel.com\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/aobosteel.com\\\/o1-tool-steel\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/aobosteel.com\\\/wp-content\\\/uploads\\\/2025\\\/04\\\/o1-steel.avif\",\"inLanguage\":\"ko-KR\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/o1-tool-steel\\\/\",\"url\":\"https:\\\/\\\/aobosteel.com\\\/o1-tool-steel\\\/\",\"name\":\"O1 Tool Steel Supplier | 1.2510 | SKS3 Bulk Supply | AoboSteel\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/aobosteel.com\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/aobosteel.com\\\/o1-tool-steel\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/aobosteel.com\\\/o1-tool-steel\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/aobosteel.com\\\/wp-content\\\/uploads\\\/2025\\\/04\\\/o1-steel.avif\",\"datePublished\":\"2025-08-03T09:26:33+00:00\",\"dateModified\":\"2026-04-25T16:15:40+00:00\",\"description\":\"Bulk supply of O1 tool steel (1.2510 \\\/ SKS3) in annealed condition. Round bar and plate available. UT inspection, MTC 3.1, 20GP container export supported.\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/aobosteel.com\\\/o1-tool-steel\\\/#breadcrumb\"},\"inLanguage\":\"ko-KR\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/aobosteel.com\\\/o1-tool-steel\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"ko-KR\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/o1-tool-steel\\\/#primaryimage\",\"url\":\"https:\\\/\\\/aobosteel.com\\\/wp-content\\\/uploads\\\/2025\\\/04\\\/o1-steel.avif\",\"contentUrl\":\"https:\\\/\\\/aobosteel.com\\\/wp-content\\\/uploads\\\/2025\\\/04\\\/o1-steel.avif\",\"width\":500,\"height\":500,\"caption\":\"O1 tool steel\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/o1-tool-steel\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"\u9996\u9875\",\"item\":\"https:\\\/\\\/aobosteel.com\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"O1 Tool Steel | 1.2510 | SKS3\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/#website\",\"url\":\"https:\\\/\\\/aobosteel.com\\\/\",\"name\":\"AoboSteel\",\"description\":\"\",\"publisher\":{\"@id\":\"https:\\\/\\\/aobosteel.com\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/aobosteel.com\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"ko-KR\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/#organization\",\"name\":\"AoboSteel\",\"url\":\"https:\\\/\\\/aobosteel.com\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"ko-KR\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/aobosteel.com\\\/wp-content\\\/uploads\\\/2025\\\/01\\\/cropped-aobo-steel-1.avif\",\"contentUrl\":\"https:\\\/\\\/aobosteel.com\\\/wp-content\\\/uploads\\\/2025\\\/01\\\/cropped-aobo-steel-1.avif\",\"width\":1052,\"height\":592,\"caption\":\"AoboSteel\"},\"image\":{\"@id\":\"https:\\\/\\\/aobosteel.com\\\/#\\\/schema\\\/logo\\\/image\\\/\"},\"sameAs\":[\"https:\\\/\\\/www.facebook.com\\\/profile.php?id=61565368220197\",\"https:\\\/\\\/www.linkedin.com\\\/in\\\/aobosteel-evan\\\/\"]},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/#\\\/schema\\\/person\\\/96118415c30ca6bb52eaf1127b052ef7\",\"name\":\"Evan\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"ko-KR\",\"@id\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/8e402f2e6f36093f0bf1855dbf79269cde23cd659c44eefdd7ecf7ff9c05786f?s=96&d=mm&r=g\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/8e402f2e6f36093f0bf1855dbf79269cde23cd659c44eefdd7ecf7ff9c05786f?s=96&d=mm&r=g\",\"contentUrl\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/8e402f2e6f36093f0bf1855dbf79269cde23cd659c44eefdd7ecf7ff9c05786f?s=96&d=mm&r=g\",\"caption\":\"Evan\"},\"sameAs\":[\"http:\\\/\\\/www.aobosteel.com\",\"https:\\\/\\\/www.facebook.com\\\/profile.php?id=61565368220197\",\"https:\\\/\\\/www.instagram.com\\\/aobosteel\\\/\",\"https:\\\/\\\/www.linkedin.com\\\/in\\\/aobosteel-evan\\\/\",\"https:\\\/\\\/x.com\\\/AobosteelEvan\",\"https:\\\/\\\/www.youtube.com\\\/@aobosteel\"],\"url\":\"https:\\\/\\\/aobosteel.com\\\/ko\\\/blog\\\/author\\\/admin\\\/\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"O1 Tool Steel Supplier | 1.2510 | SKS3 Bulk Supply | AoboSteel","description":"Bulk supply of O1 tool steel (1.2510 \/ SKS3) in annealed condition. Round bar and plate available. UT inspection, MTC 3.1, 20GP container export supported.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/aobosteel.com\/ko\/o1-tool-steel\/","og_locale":"ko_KR","og_type":"article","og_title":"O1 Tool Steel | 1.2510 | SKS3","og_description":"Bulk supply of O1 tool steel (1.2510 \/ SKS3) in annealed condition. Round bar and plate available. UT inspection, MTC 3.1, 20GP container export supported.","og_url":"https:\/\/aobosteel.com\/ko\/o1-tool-steel\/","og_site_name":"AoboSteel","article_publisher":"https:\/\/www.facebook.com\/profile.php?id=61565368220197","article_modified_time":"2026-04-25T16:15:40+00:00","og_image":[{"width":500,"height":500,"url":"https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/04\/o1-steel.avif","type":"image\/jpeg"}],"twitter_card":"summary_large_image","twitter_misc":{"\uc608\uc0c1 \ub418\ub294 \ud310\ub3c5 \uc2dc\uac04":"11\ubd84"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"TechArticle","@id":"https:\/\/aobosteel.com\/o1-tool-steel\/#article","isPartOf":{"@id":"https:\/\/aobosteel.com\/o1-tool-steel\/"},"author":{"name":"Evan","@id":"https:\/\/aobosteel.com\/#\/schema\/person\/96118415c30ca6bb52eaf1127b052ef7"},"headline":"O1 Tool Steel | 1.2510 | SKS3","datePublished":"2025-08-03T09:26:33+00:00","dateModified":"2026-04-25T16:15:40+00:00","mainEntityOfPage":{"@id":"https:\/\/aobosteel.com\/o1-tool-steel\/"},"wordCount":821,"publisher":{"@id":"https:\/\/aobosteel.com\/#organization"},"image":{"@id":"https:\/\/aobosteel.com\/o1-tool-steel\/#primaryimage"},"thumbnailUrl":"https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/04\/o1-steel.avif","inLanguage":"ko-KR"},{"@type":"WebPage","@id":"https:\/\/aobosteel.com\/o1-tool-steel\/","url":"https:\/\/aobosteel.com\/o1-tool-steel\/","name":"O1 Tool Steel Supplier | 1.2510 | SKS3 Bulk Supply | AoboSteel","isPartOf":{"@id":"https:\/\/aobosteel.com\/#website"},"primaryImageOfPage":{"@id":"https:\/\/aobosteel.com\/o1-tool-steel\/#primaryimage"},"image":{"@id":"https:\/\/aobosteel.com\/o1-tool-steel\/#primaryimage"},"thumbnailUrl":"https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/04\/o1-steel.avif","datePublished":"2025-08-03T09:26:33+00:00","dateModified":"2026-04-25T16:15:40+00:00","description":"Bulk supply of O1 tool steel (1.2510 \/ SKS3) in annealed condition. Round bar and plate available. UT inspection, MTC 3.1, 20GP container export supported.","breadcrumb":{"@id":"https:\/\/aobosteel.com\/o1-tool-steel\/#breadcrumb"},"inLanguage":"ko-KR","potentialAction":[{"@type":"ReadAction","target":["https:\/\/aobosteel.com\/o1-tool-steel\/"]}]},{"@type":"ImageObject","inLanguage":"ko-KR","@id":"https:\/\/aobosteel.com\/o1-tool-steel\/#primaryimage","url":"https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/04\/o1-steel.avif","contentUrl":"https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/04\/o1-steel.avif","width":500,"height":500,"caption":"O1 tool steel"},{"@type":"BreadcrumbList","@id":"https:\/\/aobosteel.com\/o1-tool-steel\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"\u9996\u9875","item":"https:\/\/aobosteel.com\/"},{"@type":"ListItem","position":2,"name":"O1 Tool Steel | 1.2510 | SKS3"}]},{"@type":"WebSite","@id":"https:\/\/aobosteel.com\/#website","url":"https:\/\/aobosteel.com\/","name":"AoboSteel","description":"","publisher":{"@id":"https:\/\/aobosteel.com\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/aobosteel.com\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"ko-KR"},{"@type":"Organization","@id":"https:\/\/aobosteel.com\/#organization","name":"AoboSteel","url":"https:\/\/aobosteel.com\/","logo":{"@type":"ImageObject","inLanguage":"ko-KR","@id":"https:\/\/aobosteel.com\/#\/schema\/logo\/image\/","url":"https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/01\/cropped-aobo-steel-1.avif","contentUrl":"https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/01\/cropped-aobo-steel-1.avif","width":1052,"height":592,"caption":"AoboSteel"},"image":{"@id":"https:\/\/aobosteel.com\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/profile.php?id=61565368220197","https:\/\/www.linkedin.com\/in\/aobosteel-evan\/"]},{"@type":"Person","@id":"https:\/\/aobosteel.com\/#\/schema\/person\/96118415c30ca6bb52eaf1127b052ef7","name":"Evan","image":{"@type":"ImageObject","inLanguage":"ko-KR","@id":"https:\/\/secure.gravatar.com\/avatar\/8e402f2e6f36093f0bf1855dbf79269cde23cd659c44eefdd7ecf7ff9c05786f?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/8e402f2e6f36093f0bf1855dbf79269cde23cd659c44eefdd7ecf7ff9c05786f?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/8e402f2e6f36093f0bf1855dbf79269cde23cd659c44eefdd7ecf7ff9c05786f?s=96&d=mm&r=g","caption":"Evan"},"sameAs":["http:\/\/www.aobosteel.com","https:\/\/www.facebook.com\/profile.php?id=61565368220197","https:\/\/www.instagram.com\/aobosteel\/","https:\/\/www.linkedin.com\/in\/aobosteel-evan\/","https:\/\/x.com\/AobosteelEvan","https:\/\/www.youtube.com\/@aobosteel"],"url":"https:\/\/aobosteel.com\/ko\/blog\/author\/admin\/"}]}},"uagb_featured_image_src":{"full":["https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/04\/o1-steel.avif",500,500,false],"thumbnail":["https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/04\/o1-steel-150x150.avif",150,150,true],"medium":["https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/04\/o1-steel-300x300.avif",300,300,true],"medium_large":["https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/04\/o1-steel.avif",500,500,false],"large":["https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/04\/o1-steel.avif",500,500,false],"1536x1536":["https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/04\/o1-steel.avif",500,500,false],"2048x2048":["https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/04\/o1-steel.avif",500,500,false],"trp-custom-language-flag":["https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/04\/o1-steel-12x12.avif",12,12,true]},"uagb_author_info":{"display_name":"Evan","author_link":"https:\/\/aobosteel.com\/ko\/blog\/author\/admin\/"},"uagb_comment_info":0,"uagb_excerpt":"O1 tool steel is a low-alloy cold-worked tool steel. It has a certain degree of hardenability and wear resistance, with minimal quenching deformation. The carbide distribution is uniform, and the particles are fine. Manufacturers typically use tool steel O1 to produce cold-punching dies with small cross-sections, complex shapes, and various gauges, as well as measuring&hellip;","rttpg_featured_image_url":{"full":["https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/04\/o1-steel.avif",500,500,false],"landscape":["https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/04\/o1-steel.avif",500,500,false],"portraits":["https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/04\/o1-steel.avif",500,500,false],"thumbnail":["https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/04\/o1-steel-150x150.avif",150,150,true],"medium":["https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/04\/o1-steel-300x300.avif",300,300,true],"large":["https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/04\/o1-steel.avif",500,500,false],"1536x1536":["https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/04\/o1-steel.avif",500,500,false],"2048x2048":["https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/04\/o1-steel.avif",500,500,false],"trp-custom-language-flag":["https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/04\/o1-steel-12x12.avif",12,12,true]},"rttpg_author":{"display_name":"Evan","author_link":"https:\/\/aobosteel.com\/ko\/blog\/author\/admin\/"},"rttpg_comment":0,"rttpg_category":null,"rttpg_excerpt":"O1 tool steel is a low-alloy cold-worked tool steel. It has a certain degree of hardenability and wear resistance, with minimal quenching deformation. The carbide distribution is uniform, and the particles are fine. Manufacturers typically use tool steel O1 to produce cold-punching dies with small cross-sections, complex shapes, and various gauges, as well as measuring&hellip;","_links":{"self":[{"href":"https:\/\/aobosteel.com\/ko\/wp-json\/wp\/v2\/pages\/9452","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/aobosteel.com\/ko\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/aobosteel.com\/ko\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/aobosteel.com\/ko\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/aobosteel.com\/ko\/wp-json\/wp\/v2\/comments?post=9452"}],"version-history":[{"count":0,"href":"https:\/\/aobosteel.com\/ko\/wp-json\/wp\/v2\/pages\/9452\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/aobosteel.com\/ko\/wp-json\/wp\/v2\/media\/5700"}],"wp:attachment":[{"href":"https:\/\/aobosteel.com\/ko\/wp-json\/wp\/v2\/media?parent=9452"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}