{"product_id":"1018-cold-rolled-astm-a108-carbon-steel-rectangle-bar-0-375-x-1-in","title":"1018 Cold Rolled ASTM A108 Carbon Steel Rectangle Bar 0.375 x 1 in","description":"\u003cp\u003eOur review of the 1018 Cold Rolled ASTM A108 Carbon Steel Rectangle Bar finds it best suited for machinists and fabricators who need a predictable, easy-to-work material for parts that do not require high hardness. The single biggest reason to choose this bar is its combination of a smooth cold-rolled surface and consistent machinability, which reduces setup time and produces cleaner finishes on turned, milled, or formed components. It delivers the balance of strength and workability expected from \u003cstrong\u003e1018 cold rolled steel\u003c\/strong\u003e without unnecessary cost or overly hard material properties.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Composition:\u003c\/strong\u003e The 1018 cold drawn ASTM A108 grade offers low-carbon composition for reliable weldability and general-purpose strength in fabrication work.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVersatile Applications:\u003c\/strong\u003e Suited for machining, welding, cold forming, and general fabrication, making it useful for brackets, pins, shafts, and small structural parts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMechanical Properties:\u003c\/strong\u003e Excellent ductility and consistent machinability mean easier cutting and predictable tool wear during production runs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShape Specifications:\u003c\/strong\u003e Rectangular bar format supplies flat surfaces and sharp corners for precise fixturing and dimensional control in assembly operations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSurface Finish:\u003c\/strong\u003e Smooth cold-rolled finish reduces finishing time and improves the quality of mating surfaces and visible components.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeat Treatment Options:\u003c\/strong\u003e Can be case hardened when additional wear resistance is needed while retaining a machinable core.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThe bar is ideal for shop owners, prototypers, and production machinists who need a moderate-strength steel that machines cleanly and welds reliably. It suits applications where a smooth surface and tight tolerance are more valuable than high hardness, such as fixtures, shafts under moderate load, and general mechanical components.\u003c\/p\u003e\n\u003cp\u003eIt is not the best choice for parts requiring high alloy strength or hardened cores without further treatment; users needing tool steels, high-carbon wear-resistant grades, or stainless corrosion resistance should look at other materials.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eConsistent \u003cstrong\u003emachinability\u003c\/strong\u003e and smooth finish make it quick to mill, drill, and turn with predictable results.\u003c\/li\u003e\n\u003cli\u003eGood weldability and formability allow a wide range of fabrication techniques without special preheating.\u003c\/li\u003e\n\u003cli\u003eRectangular shape with tight tolerance provides accurate flat surfaces and edge control for assemblies.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eLow-carbon composition limits intrinsic hardness, so wear resistance is modest unless case hardened.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eGrade\u003c\/td\u003e\n\u003ctd\u003e1018 Cold Rolled ASTM A108\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShape\u003c\/td\u003e\n\u003ctd\u003eRectangle bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e0.375 in x 1 in; 48 in cut length\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinish\u003c\/td\u003e\n\u003ctd\u003eSmooth cold-rolled surface\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTypical Carbon Content\u003c\/td\u003e\n\u003ctd\u003e0.15 - 0.20%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplications\u003c\/td\u003e\n\u003ctd\u003eMachining, welding, cold forming, general fabrication\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eFor a broad range of general-purpose fabrication and machining tasks, the 1018 Cold Rolled ASTM A108 rectangle bar is a practical, cost-effective choice. Its smooth finish and reliable machinability make it especially good value for shops producing medium-duty components that prioritize fit and finish over extreme hardness.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eCan this bar be welded easily?\u003c\/strong\u003e\u003cbr\u003eYes; the low-carbon 1018 composition provides good weldability for common welding processes with minimal special preparation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs the surface finish suitable for visible parts?\u003c\/strong\u003e\u003cbr\u003eYes; the cold-rolled smooth finish is generally acceptable for visible components, though final polishing may be applied if a mirror surface is required.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan the bar be hardened for wear resistance?\u003c\/strong\u003e\u003cbr\u003eIt can be case hardened to improve surface wear resistance while keeping a machinable core, but through-hardening to high hardness requires different alloying or processing.\u003c\/p\u003e","brand":"MSP Metals","offers":[{"title":"Default Title","offer_id":48744812904667,"sku":"B0F45ZHQHM","price":73.53,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/51A7TSZsRmL._SL1024_59d8a257-4b95-46a5-879c-ffadac12213c.jpg?v=1778829149","url":"https:\/\/gearmusthave.com\/products\/1018-cold-rolled-astm-a108-carbon-steel-rectangle-bar-0-375-x-1-in","provider":"GearMustHave","version":"1.0","type":"link"}