{"product_id":"starrett-57643-a2-tool-steel-flat-stock-7-8-x-4-x-18-in","title":"Starrett 57643 A2 Tool Steel Flat Stock 7\/8 X 4 X 18 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe STARRETT 57643 is an A2 air-hardening tool steel flat stock bar measuring 7\/8 inch thick, 4 inches wide, and 18 inches long. A2 tool steel is a cold-work die steel known for its excellent dimensional stability during heat treatment, good toughness, and high wear resistance after hardening. It is supplied in the annealed condition, ready for machining and subsequent heat treatment. Machinists, toolmakers, and die makers install this material in job shops, tool rooms, and manufacturing facilities where precision ground flat stock is required for punches, dies, gauges, and cutting tools.\u003c\/p\u003e\n\u003cp\u003eThis flat stock is suited to applications in tool and die making, jig and fixture fabrication, and precision instrument manufacturing. The 7\/8 x 4 x 18 inch blank size makes it appropriate for medium-to-large die sections, blanking punches, forming tools, and wear plates. The A2 air-hardening designation means the steel reaches full hardness through an air-cool cycle after austenitizing, minimizing distortion compared to oil-hardening grades. It is commonly specified wherever close-tolerance finish dimensions are needed after grinding.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eAISI A2 air-hardening tool steel composition for minimal distortion during heat treatment\u003c\/li\u003e\n  \u003cli\u003eThickness of 7\/8 inch with a tolerance of +0.010 to +0.015 inches for predictable stock allowance\u003c\/li\u003e\n  \u003cli\u003eWidth of 4 inches with a tolerance of +0.010 to +0.015 inches\u003c\/li\u003e\n  \u003cli\u003eLength of 18 inches with a tolerance of +0.250 inches\u003c\/li\u003e\n  \u003cli\u003eSquare tolerance of +0.010 to +0.015 inches for accurate layout and setup\u003c\/li\u003e\n  \u003cli\u003eSupplied in annealed condition for full machinability prior to hardening\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a standard A2 tool steel flat stock blank compatible with conventional toolroom machining, surface grinding, EDM, and heat treatment processes used in tool and die applications.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eHandle flat stock with appropriate lifting equipment given the 17.85-pound shipping weight. Machining should be performed in the annealed state before heat treatment; consult the applicable A2 heat treatment data sheet for austenitizing temperature, soak time, and air-hardening procedure. Secure the workpiece firmly in a vise or fixture before cutting to prevent movement. Always use appropriate PPE including eye protection and gloves when cutting or grinding tool steel.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Tool Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial Specification\u003c\/strong\u003e: AISI A2 Air-Hardening\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThickness\u003c\/strong\u003e: 7\/8 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth\u003c\/strong\u003e: 4 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength\u003c\/strong\u003e: 18 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThickness Tolerance\u003c\/strong\u003e: +0.010 to +0.015 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth Tolerance\u003c\/strong\u003e: +0.010 to +0.015 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength Tolerance\u003c\/strong\u003e: +0.250 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSquare Tolerance\u003c\/strong\u003e: +0.010 to +0.015 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShipping Weight\u003c\/strong\u003e: 17.85 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 31231200\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: STARRETT\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 57643\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"STARRETT","offers":[{"title":"Default Title","offer_id":51540550189362,"sku":"57643","price":915.24,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/dd4885fbdd426ecb0fa6c3cc24fba2db_f5529744-f328-47d4-ad99-bb6a27938d46.jpg?v=1785858238","url":"https:\/\/voomisupply.com\/products\/starrett-57643-a2-tool-steel-flat-stock-7-8-x-4-x-18-in","provider":"Voomi Supply","version":"1.0","type":"link"}