{"product_id":"starrett-54521-o1-tool-steel-flat-stock-1-1-4x2x36-in","title":"Starrett 54521 O1 Tool Steel Flat Stock 1-1\/4x2x36 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe STARRETT 54521 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, die making, jig construction, and precision machining applications. Manufactured from AISI Type O1 tool steel, this flat stock measures 1-1\/4 inches thick, 2 inches wide, and 36 inches long, and weighs 25.5 pounds. O1 tool steel is a tungsten-alloyed oil-hardening grade known for its dimensional stability during heat treat and its ability to hold a sharp edge after hardening. Thickness and squareness tolerances are held to tight limits, making this bar suitable for work requiring consistent stock removal and predictable hardened dimensions. Machinists, tool and die makers, and toolroom technicians are the primary installers and users of this material.\u003c\/p\u003e\u003cp\u003eThis flat stock is suited for fabricating punches, dies, gauges, cutting tools, arbors, and general toolroom parts in both job shop and production environments. The 36-inch length provides sufficient material for multiple blanks from a single piece. O1 grade is appropriate for applications that do not require the extreme wear resistance of D2 or the toughness of A2, but demand good machinability in the annealed state and reliable oil-quench hardening response. This bar is sold as a single piece per package.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eAISI Type O1 oil-hardening tool steel for predictable heat treat response\u003c\/li\u003e\n\u003cli\u003eThickness tolerance of plus or minus 0.001 inches for consistent stock dimensions\u003c\/li\u003e\n\u003cli\u003eLength tolerance of plus 0.015 inches, minus 0 inches\u003c\/li\u003e\n\u003cli\u003eWidth tolerance of 0.0000 to minus 0.005 inches\u003c\/li\u003e\n\u003cli\u003eSquareness held to 0.003 inches per inch on all edges\u003c\/li\u003e\n\u003cli\u003eAnnealed condition allows machining prior to hardening\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard O1 oil-hardening tool steel flat bar for general toolroom, die making, and precision machining applications requiring AISI Type O1 material specification.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eCutting, grinding, and machining of tool steel flat stock should be performed by qualified machinists or tool and die makers using appropriate metalworking equipment. Material should be handled in the annealed state prior to heat treatment; follow established oil-quench hardening procedures for O1 grade per applicable heat treat specifications. Wear appropriate PPE including eye protection and gloves when cutting or grinding. Do not attempt to cold-bend or straighten tool steel flat stock, as cracking may result.\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 Type O1 Oil Hardening\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness\u003c\/strong\u003e: 1-1\/4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth\u003c\/strong\u003e: 2 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength\u003c\/strong\u003e: 36 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: 0.0000 to minus 0.005 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength Tolerance\u003c\/strong\u003e: plus 0.015 inches, minus 0 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSquareness\u003c\/strong\u003e: 0.003 inches per inch on all edges\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 25.5 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\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: 54521\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"STARRETT","offers":[{"title":"Default Title","offer_id":51541253521714,"sku":"54521","price":888.39,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/6555d28ffd7e02d6cc316d25961d7428_454bf3df-554b-4707-b7f2-a1760678ecc3.jpg?v=1785870820","url":"https:\/\/voomisupply.com\/products\/starrett-54521-o1-tool-steel-flat-stock-1-1-4x2x36-in","provider":"Voomi Supply","version":"1.0","type":"link"}