{"product_id":"1018-cold-rolled-astm-a108-carbon-steel-rectangle-bar-0-375-x-0-625","title":"1018 Cold Rolled ASTM A108 Carbon Steel Rectangle Bar 0.375 x 0.625","description":"\u003cp\u003eOur review of the 1018 Cold Rolled ASTM A108 Carbon Steel Rectangle Bar concludes it is a dependable, general-purpose engineering stock for machinists and fabricators who need consistent material and a good surface finish. The single biggest reason to buy is its balance of machinability and workable strength: the cold-rolled 1018 grade delivers reliable ductility and dimensional stability that simplifies machining and welding setups. For projects that require flat surfaces, tight tolerance, and a material that responds predictably to cold forming or case hardening, this bar is an efficient choice.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMATERIAL COMPOSITION:\u003c\/strong\u003e 1018 cold rolled ASTM A108 carbon steel offers low-carbon chemistry that supports good ductility and predictable machining behavior for common manufacturing tasks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVERSATILE APPLICATIONS:\u003c\/strong\u003e The rectangular format is suitable for machining, welding, cold forming, and general fabrication where moderate strength and good surface quality are required.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMECHANICAL PROPERTIES:\u003c\/strong\u003e Excellent ductility and consistent machinability mean fewer tool changes and predictable dimension control during turning, milling, or drilling.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSHAPE SPECIFICATIONS:\u003c\/strong\u003e The rectangle bar provides flat faces and sharp corners which aid in precision setup, alignment, and fixturing in jigs and assemblies.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMACHINING CHARACTERISTICS:\u003c\/strong\u003e Good weldability and the option to case harden make this grade adaptable for components that may later require increased wear resistance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSURFACE \u0026amp; TOLERANCE:\u003c\/strong\u003e Cold-rolled, smooth finish with tight tolerances reduces preparation time and helps achieve closer fits in assembled parts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThe 1018 rectangle bar is aimed at hobbyist machinists, small job shops, and manufacturing engineers who need reliable, easy-to-machine raw material for shafts, pins, brackets, and structural components. Its low-carbon composition and cold-rolled finish make it particularly useful where good surface quality and predictable forming behavior are priorities.\u003c\/p\u003e\n\u003cp\u003eIt is less appropriate for parts that require high hardness or heavy-duty wear resistance out of the box; projects that demand high-strength alloy steel or very high hardness should consider alternative grades or a post-process hardening treatment.\u003c\/p\u003e\n\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 cold-rolled finish reduces cleanup and improves dimensional accuracy for precision work.\u003c\/li\u003e\n\u003cli\u003eGood machinability and ductility allow faster material removal and easier forming operations.\u003c\/li\u003e\n\u003cli\u003eVersatile for welding and can be case hardened when additional wear resistance is needed.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eModerate strength only; not suited for applications that require high hardness without additional heat treatment.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial Grade\u003c\/td\u003e\n\u003ctd\u003e1018 Cold Rolled ASTM A108 Carbon Steel\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 0.625 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCut Length\u003c\/td\u003e\n\u003ctd\u003e48 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinish\u003c\/td\u003e\n\u003ctd\u003eSmooth cold-rolled finish\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTypical Properties\u003c\/td\u003e\n\u003ctd\u003eGood ductility, consistent machinability, weldable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProcessing Options\u003c\/td\u003e\n\u003ctd\u003eSuitable for machining, welding, cold forming, and can be case hardened\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe 1018 Cold Rolled ASTM A108 rectangle bar is a practical, cost-effective choice for machinists and fabricators who need a smooth, dimensionally stable workpiece that machines and welds predictably. It offers good value for general-purpose components and prototype work, though buyers needing inherently high hardness should plan on additional heat treatment or select a different alloy.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this bar weldable?\u003c\/strong\u003e\u003cbr\u003eYes. The low-carbon 1018 composition provides good weldability for common welding processes.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan it be hardened for wear resistance?\u003c\/strong\u003e\u003cbr\u003eIt can be case hardened after machining to improve surface wear resistance, but it is not a high-hardness material in the as-delivered state.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAre the dimensions accurate for precision parts?\u003c\/strong\u003e\u003cbr\u003eThe cold-rolled, smooth finish and tight tolerance make it suitable for precision setups, though final machining is recommended for critical fits.\u003c\/p\u003e","brand":"MSP Metals","offers":[{"title":"Default Title","offer_id":48233464398043,"sku":"B0F45X6M7Z","price":56.71,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/51A7TSZsRmL._SL1024_cefeede8-e8d0-438c-a5e6-137b6a7a253b.jpg?v=1770809789","url":"https:\/\/gearmusthave.com\/products\/1018-cold-rolled-astm-a108-carbon-steel-rectangle-bar-0-375-x-0-625","provider":"GearMustHave","version":"1.0","type":"link"}