{"product_id":"starrett-57018-o1-tool-steel-flat-stock-0-5x1-5x18-in","title":"Starrett 57018 O1 Tool Steel Flat Stock 0.5x1.5x18 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe STARRETT 57018 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, die making, jig fabrication, and precision machining applications. Manufactured to AISI Type O1 specification, this flat stock measures 0.5 inches thick, 1.5 inches wide, and 18 inches long, with a shipping weight of 3.83 pounds. Thickness and width tolerances run from +0.010 to +0.015 inches, and length tolerance is +0.250 inches. Edge squareness is held to 0.003 inches per inch across all edges. O1 tool steel offers good machinability in the annealed state and responds well to oil-quench heat treatment, making it a widely used choice for punches, dies, gauges, and cutting tools.\u003c\/p\u003e\u003cp\u003eThis flat stock is suited for machine shops, tool-and-die operations, and maintenance departments that fabricate or repair tooling in-house. The 18-inch length provides enough stock to rough-cut multiple blanks for small tooling components. The pre-sized width and thickness reduce initial stock removal, saving setup time on the mill or surface grinder. Machinists and toolmakers in both job-shop and production environments commonly use O1 flat stock as a starting point for custom tooling, fixtures, and wear parts.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eAISI Type O1 oil-hardening tool steel — good machinability before hardening, reliable response to oil quench\u003c\/li\u003e\n\u003cli\u003eDimensions: 0.5 inches thick x 1.5 inches wide x 18 inches long\u003c\/li\u003e\n\u003cli\u003eThickness tolerance: +0.010 to +0.015 inches for consistent stock removal\u003c\/li\u003e\n\u003cli\u003eWidth tolerance: +0.010 to +0.015 inches\u003c\/li\u003e\n\u003cli\u003eLength tolerance: +0.250 inches\u003c\/li\u003e\n\u003cli\u003eEdge squareness held to 0.003 inches per inch on all edges\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a general-purpose O1 tool steel flat stock bar suitable for toolmaking, die making, fixture fabrication, and similar precision machining applications where oil-hardening tool steel is specified.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eCutting, grinding, and heat treatment of tool steel should be performed by qualified machinists or toolmakers familiar with O1 material handling. Always use appropriate personal protective equipment when cutting or grinding. If heat treating, follow proper oil-quench procedures and consult applicable shop safety protocols for quench fire prevention. Machining operations should be completed before hardening, as O1 tool steel becomes significantly harder and more brittle after heat treatment.\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: 0.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth\u003c\/strong\u003e: 1.5 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\u003eEdge Squareness\u003c\/strong\u003e: 0.003 inches per inch, all edges\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 3.83 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: 57018\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"STARRETT","offers":[{"title":"Default Title","offer_id":51541139128626,"sku":"57018","price":161.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/6555d28ffd7e02d6cc316d25961d7428_998fde3b-2ff3-4a28-a4a8-c420c7a32fbf.jpg?v=1785868850","url":"https:\/\/voomisupply.com\/products\/starrett-57018-o1-tool-steel-flat-stock-0-5x1-5x18-in","provider":"Voomi Supply","version":"1.0","type":"link"}