{"product_id":"drill-rod-tool-steels-81173403-4142-alloy-steel-flat-stock","title":"Drill Rod Tool Steels 81173403 4142 Alloy Steel Flat Stock","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe DRILL ROD TOOL STEELS 81173403 is a pre-hardened alloy steel flat stock bar conforming to AISI\/SAE Type 4142 specification. It measures 18 inches long, 2.5 inches wide, and 0.125 inches thick, and weighs 1.59 pounds. The 4142 chromium-molybdenum alloy composition delivers high strength, good toughness, and moderate wear resistance in the pre-hardened condition, making it suitable for tooling, fixtures, die components, jigs, and structural machine parts. Machinists, tool-and-die makers, and metalworking fabricators work with this material when a through-hardened flat bar is required without additional heat treatment steps.\u003c\/p\u003e\n\u003cp\u003eThis flat stock is used in applications that demand a combination of strength and machinability in alloy steel. Typical uses include machined fixtures, support brackets, tooling plates, wear components, and fabricated structural members in industrial and manufacturing environments. The pre-hardened condition allows the part to be cut, drilled, and milled directly to final dimensions without the distortion risks associated with post-machining heat treatment. It is suited for both light production runs and one-off tooling work.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eAISI\/SAE Type 4142 chromium-molybdenum alloy steel, pre-hardened for immediate use\u003c\/li\u003e\n  \u003cli\u003eNominal dimensions: 18 inches long x 2.5 inches wide x 0.125 inches thick\u003c\/li\u003e\n  \u003cli\u003eLength tolerance: +0.125 inches \/ -0.000 inches\u003c\/li\u003e\n  \u003cli\u003eWidth tolerance: +0.005 inches \/ -0.000 inches\u003c\/li\u003e\n  \u003cli\u003eThickness tolerance: +0.001 inches\u003c\/li\u003e\n  \u003cli\u003eSquare tolerance: 0.003 inches\u003c\/li\u003e\n  \u003cli\u003ePre-hardened condition eliminates need for post-machining heat treatment\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a standard AISI\/SAE Type 4142 pre-hardened alloy steel flat bar suitable for general tooling, fixture, and structural fabrication applications where a through-hardened chromium-molybdenum flat stock is specified.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eThis material is worked by machinists, tool-and-die makers, and metal fabricators using conventional milling, drilling, sawing, and grinding equipment appropriate for hardened alloy steel. Carbide or high-speed steel tooling rated for hardened steel is recommended. Welding pre-hardened 4142 requires preheat and post-weld heat treatment procedures per applicable welding codes to avoid hydrogen cracking; consult a qualified welding engineer before attempting weld repairs. Always use appropriate personal protective equipment when cutting or grinding steel stock.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 18 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Width\u003c\/strong\u003e: 2.5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Thickness\u003c\/strong\u003e: 0.125 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 1.59 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial Specification\u003c\/strong\u003e: AISI\/SAE Type 4142 Alloy Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCondition\u003c\/strong\u003e: Pre-Hardened\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength Tolerance\u003c\/strong\u003e: +0.125 inches \/ -0.000 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth Tolerance\u003c\/strong\u003e: +0.005 inches \/ -0.000 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThickness Tolerance\u003c\/strong\u003e: +0.001 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSquare Tolerance\u003c\/strong\u003e: 0.003 inches\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: DRILL ROD TOOL STEELS\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 81173403\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"DRILL ROD \u0026 TOOL STEELS","offers":[{"title":"Default Title","offer_id":51958828171570,"sku":"81173403","price":57.25,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/0bd010a1cae711f9686084786dbdb869_5d3d9b01-ca4e-42a6-a91e-d1f730100e6b.jpg?v=1789945322","url":"https:\/\/voomisupply.com\/products\/drill-rod-tool-steels-81173403-4142-alloy-steel-flat-stock","provider":"Voomi Supply","version":"1.0","type":"link"}