{"product_id":"a513-cold-roll-carbon-steel-round-tubing-2-1-2-in-od-durable","title":"A513 Cold Roll Carbon Steel Round Tubing 2-1\/2 in OD - Durable","description":"\u003cp\u003eIn this review of the A513 cold roll carbon steel round tubing, the bottom line is simple: this is a workhorse length of drawn-over-mandrel tubing for fabricators and technicians who need reliable strength and a smooth bore. The reviewer found it most appealing for automotive HVAC, fluid transfer, and mechanical shaft or pin applications where a consistent wall and higher yield strength matter. Our review highlights that the tubing meets ASTM A513, offers a cold-rolled hardness advantage over hot-rolled alternatives, and is best chosen when structural rigidity and tight outer dimensions are priorities.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrawn over mandrel:\u003c\/strong\u003e Provides a smoother bore and more consistent wall thickness compared with non-drawn welded tubing, which benefits precision assemblies and flow applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCold rolled construction:\u003c\/strong\u003e Delivers greater yield strength and hardness than hot-rolled tubing, making it better suited to load-bearing parts like shafts and pins.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eASTM A513 compliance:\u003c\/strong\u003e Ensures the tubing meets a recognized quality standard for industrial and HVAC use, giving confidence in material consistency.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDefined geometry:\u003c\/strong\u003e The 2-1\/2 in outside diameter with a 0.50 in wall and 1.5 in inside diameter provides predictable mechanical properties for design and fit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShort, ready length:\u003c\/strong\u003e At 12 in length the piece is convenient for mockups, repairs, or short-run fabrication without additional cutting.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho It's For\u003c\/h2\u003e\u003cp\u003eThis tubing is aimed at machinists, HVAC technicians, automotive fabricators, and hobbyists who need a strong, consistent carbon steel tube for pins, shafts, spindles, or fluid lines. The combination of cold rolling and drawn-over-mandrel welding suits projects where a smooth bore and tighter wall tolerance are valuable.\u003c\/p\u003e\u003cp\u003eThose who should look elsewhere include users who require ultra-high weldability or the easiest machinability available, or projects demanding seamless tube metallurgy for critical pressure or corrosion resistance. If corrosion resistance or stainless performance is required, choose a stainless grade instead.\u003c\/p\u003e\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eGood structural strength and rigidity due to the cold-rolled 1018 carbon steel construction.\u003c\/li\u003e\n\u003cli\u003eConsistent wall thickness and smoother inner bore from the drawn-over-mandrel process aid assembly and flow.\u003c\/li\u003e\n\u003cli\u003eMeets ASTM A513, providing assurance of a standard industrial specification for applications like automotive A\/C lines.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eCarbon steel has lower weldability and machinability than softer steels, so expect a bit more effort when fabricating.\u003c\/li\u003e\n\u003cli\u003eSome users may find the inner diameter slightly smaller than expected, which can affect slip-fit applications.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandard\u003c\/td\u003e\n\u003ctd\u003eASTM A513\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutside diameter\u003c\/td\u003e\n\u003ctd\u003e2-1\/2 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInside diameter\u003c\/td\u003e\n\u003ctd\u003e1.5 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWall thickness\u003c\/td\u003e\n\u003ctd\u003e0.50 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLength\u003c\/td\u003e\n\u003ctd\u003e12 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eCold roll carbon steel (1018 range)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eOur Verdict\u003c\/h2\u003e\u003cp\u003eThe A513 cold roll carbon steel round tubing is a pragmatic choice for anyone who needs a short length of strong, dimensionally consistent tubing for mechanical or HVAC work. It delivers solid value for applications that prioritize rigidity and a smooth bore, though fabricators should be prepared for slightly reduced machinability and to confirm fit where inner diameter tolerance is critical.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eIs this tubing suitable for automotive A\/C lines?\u003c\/strong\u003e\u003cbr\u003eYes - the tubing meets ASTM A513 and the drawn bore and consistent wall make it appropriate for automotive air conditioning line use when carbon steel is acceptable.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan the tubing be welded and machined easily?\u003c\/strong\u003e\u003cbr\u003eIt can be welded and machined, but as a cold-rolled carbon steel the weldability and machinability are somewhat lower than softer steels; expect standard precautions and tooling.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the inner diameter allow slip-fit components?\u003c\/strong\u003e\u003cbr\u003eMost reviewers report the dimensions are accurate, but some note the inner diameter can be slightly smaller than expected, so measure before relying on a slip fit.\u003c\/p\u003e","brand":"Online Metals","offers":[{"title":"Default Title","offer_id":48250430456027,"sku":"B000H9K6VW","price":95.24,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/51RCqvxR91L._AC_SL1000_ce4b1e71-8b1f-48ea-9da5-16e66f08b253.jpg?v=1771002061","url":"https:\/\/gearmusthave.com\/products\/a513-cold-roll-carbon-steel-round-tubing-2-1-2-in-od-durable","provider":"GearMustHave","version":"1.0","type":"link"}