{"product_id":"starrett-57530-a2-tool-steel-flat-stock-5-16x1-3-4x18-in","title":"Starrett 57530 A2 Tool Steel Flat Stock 5\/16x1-3\/4x18 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe STARRETT 57530 is an A2 air-hardening tool steel flat stock bar used in toolmaking, die making, and precision machining applications. Measuring 0.3125 inches thick by 1.75 inches wide by 18 inches long, this flat stock is ground to tight dimensional tolerances, making it suitable for fabricating punches, dies, gauges, and fixtures that require predictable hardening response. A2 tool steel is an air-hardening grade, meaning it achieves hardness through controlled air cooling rather than quench media, which reduces distortion during heat treatment. Machinists, tool-and-die makers, and industrial fabricators work with this material in precision shops and maintenance environments.\u003c\/p\u003e\u003cp\u003eA2 flat stock in this size is commonly used in short-run die sets, forming tools, blanking punches, and wear components where dimensional stability after hardening is critical. The 18-inch length allows multiple blanks to be cut from a single bar. The ground finish and close width and thickness tolerances reduce the amount of stock removal required before heat treatment. This piece ships as a single bar with no minimum beyond one unit.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eA2 air-hardening tool steel offers excellent dimensional stability during heat treatment compared to oil-hardening grades\u003c\/li\u003e\n\u003cli\u003eThickness tolerance of plus or minus 0.001 inches supports tight-tolerance layout and machining\u003c\/li\u003e\n\u003cli\u003eWidth tolerance of plus 0.000 to plus 0.005 inches for consistent stock removal planning\u003c\/li\u003e\n\u003cli\u003eLength tolerance of plus 0.250 inches provides usable overstock for part layout\u003c\/li\u003e\n\u003cli\u003eSquare tolerance of plus or minus 0.001 inches ensures reliable reference surfaces\u003c\/li\u003e\n\u003cli\u003eGround flat stock finish reduces pre-machining prep time\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard A2 air-hardening tool steel flat bar suitable for use in general toolmaking, die fabrication, and precision fixture work wherever AISI A2 material specification is required.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eCutting, grinding, and machining of tool steel flat stock should be performed using tooling rated for hardened or semi-hardened ferrous materials. Heat treatment of A2 tool steel should follow the material manufacturer hardening and tempering guidelines and is typically performed by a qualified heat treater. Allow the bar to reach thermal equilibrium before precision layout work. Use appropriate personal protective equipment when cutting or grinding tool steel.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\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: 5\/16 inches (0.3125 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth\u003c\/strong\u003e: 1-3\/4 inches (1.75 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: plus or minus 0.001 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth Tolerance\u003c\/strong\u003e: plus 0.000 to plus 0.005 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength Tolerance\u003c\/strong\u003e: plus 0.250 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSquare Tolerance\u003c\/strong\u003e: plus or minus 0.001 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 2.79 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 31231200\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\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: 57530\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"STARRETT","offers":[{"title":"Default Title","offer_id":51541565505842,"sku":"57530","price":207.42,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/dd4885fbdd426ecb0fa6c3cc24fba2db_a8f9bbd7-482c-4fa3-b6fa-4bf9acad27f2.jpg?v=1785879279","url":"https:\/\/voomisupply.com\/products\/starrett-57530-a2-tool-steel-flat-stock-5-16x1-3-4x18-in","provider":"Voomi Supply","version":"1.0","type":"link"}