{"product_id":"carbon-steel-square-tubing-1-5-in-x-3-16-in-x-36-in-structural","title":"Carbon Steel Square Tubing 1.5 in x 3\/16 in x 36 in - Structural","description":"\u003cp\u003eIn this review of the OnlineMetals A500\/A513 carbon steel square tubing, the bottom line is simple: this is a solid, no-frills choice for fabricators and hobbyists who need a dependable structural member that is ready for modification. The reviewer found the tube most valuable for builds requiring a straight, uniform 1.5 in square profile with a sturdy 3\/16 in wall and a 36 in length. Its main selling point is raw, weldable carbon steel that performs well when cut, drilled, or welded into frames and machine supports.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-strength carbon steel:\u003c\/strong\u003e Provides reliable structural integrity for frameworks and machine supports where durability matters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1.5 in height, 3\/16 in wall:\u003c\/strong\u003e The specific dimensions offer a good balance of stiffness and weight for medium-duty applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e36 in length:\u003c\/strong\u003e A convenient 3 ft stick that is easy to handle in a garage or shop and fits common project layouts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReady for modification:\u003c\/strong\u003e Uncoated surface accepts welding, drilling, and cutting without special preparation beyond standard shop practices.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable and sustainable:\u003c\/strong\u003e Engineered for wear resistance and is fully recyclable, which suits long-term installations and eco-conscious builds.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMultipurpose use:\u003c\/strong\u003e Works well with tubing connectors and fittings for harnesses, machine fab, and model materials.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis tubing is best for metalworkers, small fabricators, and serious hobbyists building frames, jigs, or machine supports who want a predictable, weldable piece of raw steel. Its dimensions and wall thickness make it suitable for projects that need moderate load capacity without the complexity of custom machining.\u003c\/p\u003e\n\u003cp\u003eThose who need a corrosion-free finish out of the box or very tight dimensional tolerances for precision instrumentation may want to look at pretreated or cold-drawn alternatives. Buyers also wanting lengths longer than 36 in per piece should consider ordering multiple pieces or longer-stock options elsewhere.\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\u003eGood material quality that customers praise for strength and functionality in practical builds.\u003c\/li\u003e\n\u003cli\u003eReady-to-modify uncoated surface simplifies welding and cutting operations in a typical shop workflow.\u003c\/li\u003e\n\u003cli\u003eDimensionally useful 1.5 in square and 3\/16 in wall for medium-duty structural tasks and machine mounting.\u003c\/li\u003e\n\u003cli\u003eRecyclable and engineered for resistance to wear, making it a durable choice for long-term use.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSurface corrosion resistance receives mixed feedback, so parts may require surface treatment for outdoor or humid environments.\u003c\/li\u003e\n\u003cli\u003eSingle 36 in length may be limiting for larger projects without splicing or additional pieces.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eCarbon steel (ASTM A-36, A500\/A513 implied)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShape\u003c\/td\u003e\n\u003ctd\u003eSquare tubing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeight\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\u003e3\/16 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\u003eFinish\u003c\/td\u003e\n\u003ctd\u003eUncoated, ready for modification\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eFor builders needing a straightforward piece of structural steel, this 1.5 in x 3\/16 in x 36 in square tubing is a pragmatic choice that delivers on strength, workability, and value. It is especially good for shop fabrication, machine supports, and architectural metalwork when buyers are prepared to apply any required corrosion protection for exposed installations.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eCan this tubing be welded?\u003c\/strong\u003e\u003cbr\u003eYes. The uncoated carbon steel surface is suitable for common welding methods after standard shop preparation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs the tubing rust-proof?\u003c\/strong\u003e\u003cbr\u003eNo. Customers report mixed rust resistance; for outdoor or humid use, apply paint or other corrosion protection.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the length and wall thickness?\u003c\/strong\u003e\u003cbr\u003eThe tube measures 36 in long with a 1.5 in square profile and a 3\/16 in wall thickness.\u003c\/p\u003e","brand":"Online Metals","offers":[{"title":"Default Title","offer_id":48618089873627,"sku":"B000H9M3ZO","price":33.7,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/51mvzNj-mjL._AC_SL1000_6608e59a-1355-407b-a28e-9d7a3723042e.jpg?v=1778472387","url":"https:\/\/gearmusthave.com\/products\/carbon-steel-square-tubing-1-5-in-x-3-16-in-x-36-in-structural","provider":"GearMustHave","version":"1.0","type":"link"}