{"product_id":"a513-cold-roll-carbon-steel-round-tubing-2-1-2-in-od-36-in-length","title":"A513 Cold Roll Carbon Steel Round Tubing 2-1\/2 in OD 36 in Length","description":"\u003cp\u003eOur review of the A513 Cold Roll Carbon Steel Round Tubing finds it best suited for fabricators, HVAC technicians, and automotive DIYers who need a sturdy, precise section of welded tubing. The single biggest reason to buy this tubing is its combination of cold rolled strength and a drawn-over-mandrel bore that delivers a smoother inner surface and consistent wall thickness, making it reliable for fluid lines, shafts, and structural uses where rigidity and predictable dimensions matter.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eA513 grade steel:\u003c\/strong\u003e Provides high strength and rigidity appropriate for mechanical and structural projects where durability matters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrawn over mandrel:\u003c\/strong\u003e Delivers a smoother bore than standard welded tubing, reducing turbulence and easing fit for inserts or seals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCold rolled finish:\u003c\/strong\u003e Increases yield strength and hardness over hot rolled alternatives, so the tubing holds shape under load.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecise dimensions:\u003c\/strong\u003e With a 2-1\/2 in outside diameter, 2.125 in inside diameter and 0.1875 in wall, the tube works well where predictable clearance and wall retention are required.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eASTM A513 compliance:\u003c\/strong\u003e Meets a recognized quality standard which helps when specifying material for HVAC or automotive air conditioning lines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e36 in length:\u003c\/strong\u003e A convenient one-piece length for many repairs and fabrication tasks without immediate need to join sections.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho It's For\u003c\/h2\u003e\u003cp\u003eThis tubing is aimed at professionals and experienced hobbyists who need a solid, drawn welded tube for applications like automotive air conditioning lines, fuel tank fittings, shafts, or small structural members. The combination of 1018-style carbon steel characteristics and the D.O.M. process makes it a good fit where strength and a smoother bore are required.\u003c\/p\u003e\u003cp\u003eThose who should look elsewhere include projects requiring superior weldability or extensive machining ease, and applications that must use stainless or nonferrous alloys for corrosion resistance or food-grade service. Also consider seamless tubing if absolute uniformity without a weld is critical.\u003c\/p\u003e\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eStrong, rigid material that performs well under mechanical load and in structural uses.\u003c\/li\u003e\n\u003cli\u003eSmoother bore from the drawn-over-mandrel process improves flow and fit for inserts or seals.\u003c\/li\u003e\n\u003cli\u003eCold rolling increases hardness and yield strength compared with hot rolled tubing.\u003c\/li\u003e\n\u003cli\u003eGood value for common industrial and automotive applications.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eCarbon A513 steel has slightly lower machinability and weldability than some low-carbon alternatives, which can slow fabrication in some shops.\u003c\/li\u003e\n\u003cli\u003eSome users report the inner diameter can be slightly smaller than expected, so measure before final assembly.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eA513 cold roll carbon steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutside diameter\u003c\/td\u003e\n\u003ctd\u003e2.5 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInside diameter\u003c\/td\u003e\n\u003ctd\u003e2.125 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWall thickness\u003c\/td\u003e\n\u003ctd\u003e0.1875 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLength\u003c\/td\u003e\n\u003ctd\u003e36 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacture\u003c\/td\u003e\n\u003ctd\u003eWelded, drawn over mandrel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandards\u003c\/td\u003e\n\u003ctd\u003eMeets ASTM A513\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 recommended for technicians and fabricators who need a durable, consistent tubular section for HVAC, automotive, or general mechanical work. Its cold rolled strength, D.O.M. bore, and ASTM A513 compliance make it a practical, cost-effective choice for repairs and small builds where corrosion resistance is not the primary concern.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eIs this tubing suitable for automotive fuel or AC lines?\u003c\/strong\u003e\u003cbr\u003eYes, customers report successful use in fuel tank and automotive AC applications, though check fittings and seals for compatibility.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan this tubing be welded and machined easily?\u003c\/strong\u003e\u003cbr\u003eIt can be welded and machined, but A513 carbon steel has slightly lower machinability and weldability than some low-carbon grades, so adjustments may be needed.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the internal diameter match nominal dimensions exactly?\u003c\/strong\u003e\u003cbr\u003eMost buyers find dimensions accurate, but some note the inner diameter can be slightly smaller than expected, so verify before final assembly.\u003c\/p\u003e","brand":"Online Metals","offers":[{"title":"Default Title","offer_id":48750709342427,"sku":"B000H9K3Q0","price":82.44,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/51RCqvxR91L._AC_SL1000_77fa6c38-7f0a-4873-aa19-d90d3519bc7a.jpg?v=1778765610","url":"https:\/\/gearmusthave.com\/products\/a513-cold-roll-carbon-steel-round-tubing-2-1-2-in-od-36-in-length","provider":"GearMustHave","version":"1.0","type":"link"}