{"id":9444,"date":"2025-08-03T16:40:15","date_gmt":"2025-08-03T08:40:15","guid":{"rendered":"https:\/\/aobosteel.com\/?page_id=9444"},"modified":"2026-02-28T16:49:38","modified_gmt":"2026-02-28T08:49:38","slug":"o2-tool-steel","status":"publish","type":"page","link":"https:\/\/aobosteel.com\/ko\/o2-tool-steel\/","title":{"rendered":"O2 Tool Steel | 1.2842"},"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; O2 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 O2 Tool Steel | 1.2842 | SKS31 Oil-Hardening Cold Work Steel<\/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 O2 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 Distributor Supply Structure<\/a><\/div>\n<\/div>\n<\/div><\/div>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-uagb-container uagb-block-208de05f alignfull uagb-is-root-container\"><div class=\"uagb-container-inner-blocks-wrap\">\n<p class=\"wp-block-paragraph\">O2 tool steel has high hardness and wear resistance. It experiences minimal distortion during quenching and has excellent hardenability. This steel is suitable for making various precision measuring tools and templates. It is also used for smaller-dimension dies, cold press molds, engraving molds, and blanking dies. Additionally, it can be used for machine tool screws and other structural components.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The designation is O2 in the U.S. ASTM A681 system. Similar designations under other national standards include ISO 90MnV2, USA\/UNS T31502, Germany\/DIN 90MnCrV8, and Germany\/W-Nr.\u00a01.2842.\u00a0<\/p>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-uagb-container uagb-block-8d34a8d1 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\"><thead><tr><th>Item<\/th><th>Details<\/th><\/tr><\/thead><tbody><tr><td>Grade<\/td><td>AISI O2 \/ DIN 1.2842 \/ JIS SKS31<\/td><\/tr><tr><td>Delivery Condition<\/td><td>Fully Annealed (Max. 215\u2013230 HB, Suitable 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 monthly output with continuous inventory support<\/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 (Stock Ingot)<\/td><td>Approx. 20 days<\/td><\/tr><tr><td>Lead Time (Fresh Melt)<\/td><td>30\u201345 days<\/td><\/tr><tr><td>Lead Time (ESR Option)<\/td><td>Approx. 60 days<\/td><\/tr><tr><td>Inspection<\/td><td>100% UT tested to SEP 1921-82 Class D\/d or E\/e<\/td><\/tr><tr><td>Documentation<\/td><td>MTC (EN 10204 3.1) + UT Report per order<\/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 alloy sourcing for O2 oil-hardening grade<\/li>\n\n\n\n<li>Consistent annealed structure for predictable machining<\/li>\n\n\n\n<li><a href=\"https:\/\/aobosteel.com\/ko\/knowledge-hub\/what-is-electroslag-remelting-esr\/\">ESR (Electro-Slag Remelting)<\/a> available upon request<\/li>\n\n\n\n<li>Batch traceability linked to original heat number<\/li>\n\n\n\n<li>Designed for distributor and stockist bulk replenishment<\/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 Bulk O2 Quote<\/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<\/li>\n\n\n\n<li>20GP container optimized loading (up to ~26 tons)<\/li>\n\n\n\n<li>Mixed sizes and mixed specifications supported in one container<\/li>\n\n\n\n<li>Anti-rust protection for long sea transit<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"h-\">For international buyers, full container loading is strongly recommended for cost efficiency and smoother customs clearance.<\/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 O2 Full Container Price<\/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-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\n\n\n<div class=\"wp-block-uagb-container uagb-block-54846d9f 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<p class=\"wp-block-paragraph\">To provide a clearer picture, here\u2019s a breakdown of typical industrial uses for O2 tool steel, highlighting where its properties deliver maximum benefit:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><th>Application Category<\/th><th>Specific O2 Steel Uses<\/th><th>Key Advantages for Your Operations<\/th><\/tr><tr><td><strong>Dies and Punches<\/strong><\/td><td>Blanking dies, trimming tools, drawing dies, flanging tools, forming punches. Notably effective for blank holders in stamping tools (resisting pressure and friction) and as ejectors and blank holders in deep drawing dies (withstanding friction).<\/td><td>Excellent wear resistance, good toughness, maintains dimensional stability for consistent part production.<\/td><\/tr><tr><td><strong>Gages<\/strong><\/td><td>Precision measurement tools, master gages.<\/td><td>High dimensional stability after hardening, crucial for accuracy; good wear resistance for longevity.<\/td><\/tr><tr><td><strong>Machinery Components<\/strong><\/td><td>Items like cams, durable bushings, and wear-resistant guides.<\/td><td>Offers the necessary wear resistance and toughness for demanding mechanical parts.<\/td><\/tr><tr><td><strong>Coining &amp; Powder Pressing<\/strong><\/td><td>Tooling for coining operations, punches, and dies for powder metal compacting.<\/td><td>Withstands high compressive forces and abrasive wear common in these processes.<\/td><\/tr><tr><td><strong>Cold Rolling<\/strong><\/td><td>Rolls used in cold rolling applications.<\/td><td>Delivers the high wear resistance and toughness required for shaping metals at ambient temperatures.<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-uagb-container uagb-block-58e4c670 alignfull uagb-is-root-container\"><div class=\"uagb-container-inner-blocks-wrap\">\n<h2 class=\"wp-block-heading\" id=\"2-eael-table-of-content\">O2 and Its Equivalent Grades&#8217; Chemical Composition<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><td><strong>Grade<\/strong><\/td><td><strong>C<\/strong><\/td><td><strong>Si<\/strong><\/td><td><strong>Mn<\/strong><\/td><td><strong>Cr<\/strong><\/td><td><strong>V<\/strong><\/td><td><strong>W<\/strong><\/td><td><strong>P\/S (Max)<\/strong><\/td><\/tr><\/thead><tbody><tr><td>O2 <\/td><td>0.85\u20130.95<\/td><td>0.50<\/td><td>1.40\u20131.80<\/td><td>0.40\u20130.60<\/td><td>0.30<\/td><td>0.40\u20130.60<\/td><td>0.030<\/td><\/tr><tr><td>1.2842 <\/td><td>0.85\u20130.95<\/td><td>0.10\u20130.40<\/td><td>1.80\u20132.20<\/td><td>0.20\u20130.50<\/td><td>0.05\u20130.15<\/td><td>\u2014<\/td><td>0.030<\/td><\/tr><tr><td>SKS31<\/td><td>0.90\u20131.05<\/td><td>0.35<\/td><td>0.90\u20131.20<\/td><td>0.50\u20131.00<\/td><td>\u2014<\/td><td>0.50\u20131.00<\/td><td>0.030<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-uagb-container uagb-block-e25bf02b alignfull uagb-is-root-container\"><div class=\"uagb-container-inner-blocks-wrap\">\n<h2 class=\"wp-block-heading\" id=\"3-eael-table-of-content\">O2 Tool Steel Properties<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Here\u2019s a breakdown of the key&nbsp;<strong>O2 steel properties<\/strong>&nbsp;and what they mean for your operations:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><th>Property Category<\/th><th>Description &amp; Significance for Users<\/th><\/tr><tr><td>High Hardness<\/td><td>Achieves a notable surface hardness (60-62 HRC), critical for resisting indentation and maintaining a sharp cutting edge or durable forming surface in tooling.<\/td><\/tr><tr><td>Good Wear Resistance<\/td><td>The high carbon content and resultant hardness contribute to good resistance against abrasive wear, extending the service life of tools and dies.<\/td><\/tr><tr><td>Fair Toughness<\/td><td>Offers a balanced level of toughness suitable for many cold-work applications, helping to prevent premature chipping or fracture under operational stresses.<\/td><\/tr><tr><td>Good Non-Deforming Properties<\/td><td>Exhibits commendable dimensional stability with relatively low distortion after the oil-quenching heat treatment process. This is vital for precision tooling.<\/td><\/tr><tr><td>Good Safety in Hardening<\/td><td>The oil-quenching method used for O2 steel minimizes the risk of cracking and distortion compared to water quenching, especially beneficial for complex tool geometries.<\/td><\/tr><tr><td>Machinability<\/td><td>In its annealed (pre-hardened) state, O2 tool steel (similar to O1 in this regard) offers good machinability, facilitating easier tool fabrication.<\/td><\/tr><tr><td>Thermal Sensitivity<\/td><td>It\u2019s important to note that O2 steel has poor resistance to softening at elevated temperatures. This characteristic firmly places it within the cold-work steel category, meaning it\u2019s not intended for applications involving high heat.<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-uagb-container uagb-block-6b0ee138 alignfull uagb-is-root-container\"><div class=\"uagb-container-inner-blocks-wrap\">\n<h2 class=\"wp-block-heading\" id=\"14-eael-table-of-content\"> O2 Steel Heat Treatment Parameters<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Process Step<\/strong><\/td><td><strong>Temperature Range<\/strong><\/td><td><strong>Typical Duration\/Key Notes<\/strong><\/td><td><strong>Primary Purpose<\/strong><\/td><\/tr><tr><td>Preheating<\/td><td>~650\u00b0C (1200\u00b0F)<\/td><td>Until uniform temperature<\/td><td>Minimize thermal shock, reduce distortion risk<\/td><\/tr><tr><td><a href=\"https:\/\/aobosteel.com\/ko\/knowledge-hub\/what-is-austenitizing\/\">Austenitizing<\/a><\/td><td>790\u2013815\u00b0C (1454\u20131472\u00b0F)<\/td><td>30\u201345 min per 25mm (1 inch) of section<\/td><td>Form austenite, dissolve carbides<\/td><\/tr><tr><td><a href=\"https:\/\/aobosteel.com\/ko\/knowledge-hub\/what-is-quenching\/\">Quenching<\/a> (Oil)<\/td><td>Cool to 66\u201393\u00b0C (150\u2013200\u00b0F)<\/td><td>Rapid cooling in oil<\/td><td>Transform austenite to martensite<\/td><\/tr><tr><td><a href=\"https:\/\/aobosteel.com\/ko\/knowledge-hub\/what-is-tempering\/\">Tempering<\/a><\/td><td>149\u2013232\u00b0C (300\u2013450\u00b0F) (e.g., 175\u00b0C \/ 350\u00b0F typical)<\/td><td>Min. 2 hrs per 25mm (1 inch) section.\u00a0Temper ASAP\u00a0once part reaches 52-65\u00b0C (125-150\u00b0F).<\/td><td>Improve toughness, reduce brittleness, relieve stress. Multiple tempers often best.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">For detailed heat treatment parameters for O2 tool steel, including hardening temperature, oil quenching process, and tempering range, please refer to our dedicated <a href=\"https:\/\/aobosteel.com\/ko\/o2-tool-steel-heat-treatment\/\">O2 heat treatment guide<\/a>.<\/p>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-group is-layout-constrained wp-block-group-is-layout-constrained\">\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>\n\n\n\n<script type=\"application\/ld+json\">{\n    \"@context\": \"https:\\\/\\\/schema.org\\\/\",\n    \"@type\": \"Product\",\n    \"name\": \"Forged O2 \\\/ 1.2842 Tool Steel Round Bar\",\n    \"image\": \"https:\\\/\\\/aobosteel.com\\\/wp-content\\\/uploads\\\/2025\\\/03\\\/O2-steel-scaled-e1741161183344.webp\",\n    \"description\": \"High-quality Forged O2 (1.2842) Cold Work Tool Steel directly from Aobo Steel factory. Known for excellent machinability and high dimensional stability after hardening. Custom forged sizes available. 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It experiences minimal distortion during quenching and has excellent hardenability. This steel is suitable for making various precision measuring tools and templates. It is also used for smaller-dimension dies, cold press molds, engraving molds, and blanking dies. 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