{"product_id":"carbon-steel-square-tubing-4in-x-1-4in-x-48in-heavy-duty-structural","title":"Carbon Steel Square Tubing 4in x 1\/4in x 48in - Heavy Duty Structural","description":"\u003cp\u003eIn this review of the OnlineMetals A500\/A513 carbon steel square tubing, the bottom line is simple: this is a straightforward, heavy-duty length of structural steel best suited for builders, metal fabricators and serious hobbyists who need reliable material to weld, cut and form. The single biggest reason to buy is the combination of a 4in profile with a robust 1\/4in wall and a full 48in length that arrives uncoated and ready for modification, making it a practical raw material for frames, machine supports and architectural components.\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 the structural integrity needed for load-bearing frames and machine supports without exotic alloys.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4in height:\u003c\/strong\u003e A substantial profile that makes layout and attachment straightforward for square-tube assemblies and fixtures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1\/4in wall thickness:\u003c\/strong\u003e Offers durability and stiffness that reduces flex and works well with common welding and fastening methods.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e48in length and uncoated finish:\u003c\/strong\u003e Delivered as a full 4ft length ready to be cut, drilled or welded to custom dimensions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMultipurpose use:\u003c\/strong\u003e Suits machine fabrication, model material, sand separators and other industrial or hobby projects where standard tubing is required.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRecyclable and sustainable:\u003c\/strong\u003e Made from carbon steel that can be recycled at end of life, supporting long-term material reuse.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis tubing is ideal for metalworkers, fabricators and engineers who need dependable raw steel for structural projects: think shop-built machinery, welded frames, supports and decorative architectural elements where a straight, heavy-walled 4in tube is required. It fits well in both commercial shop environments and serious home shops where modifications such as cutting and welding are routine.\u003c\/p\u003e\n\u003cp\u003eThose who should look elsewhere include buyers who require a finished or coated product straight from the vendor, users who need corrosion protection for long-term outdoor exposure without additional treatment, and anyone seeking lighter-gauge or nonferrous tubing for weight-sensitive applications.\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 overall \u003cstrong\u003esteel quality\u003c\/strong\u003e and consistent dimensions for reliable fabrication.\u003c\/li\u003e\n\u003cli\u003eRobust 1\/4in wall gives excellent rigidity for structural use and machine parts.\u003c\/li\u003e\n\u003cli\u003eUncoated, full 48in length arrives ready to be modified to suit specific projects.\u003c\/li\u003e\n\u003cli\u003eRecyclable material makes it a durable and sustainable raw option.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMixed reports on \u003cstrong\u003erust resistance\u003c\/strong\u003e mean outdoor use may require a protective finish.\u003c\/li\u003e\n\u003cli\u003eUncoated surface may need prepping, which adds time for projects that require corrosion protection or a finished look.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eCarbon steel square tubing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandard\u003c\/td\u003e\n\u003ctd\u003eA500\/A513, ASTM A-36\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeight\u003c\/td\u003e\n\u003ctd\u003e4in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWall Thickness\u003c\/td\u003e\n\u003ctd\u003e1\/4in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLength\u003c\/td\u003e\n\u003ctd\u003e48in (4ft)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinish\u003c\/td\u003e\n\u003ctd\u003eHot rolled, uncoated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommon Uses\u003c\/td\u003e\n\u003ctd\u003eFramework, machine supports, architectural metalwork\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe OnlineMetals 4in x 1\/4in x 48in carbon steel square tubing is a practical, no-frills raw material for anyone building robust structures or machine parts. It represents good value for fabricators who will finish or coat the steel themselves, delivering dependable dimensions and the strength needed for most shop and industrial uses.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this tubing ready to weld?\u003c\/strong\u003e\u003cbr\u003eYes, the piece is uncoated and hot rolled, making it ready for cutting, drilling and welding with standard shop practices.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill it rust if left outdoors?\u003c\/strong\u003e\u003cbr\u003eThe tubing is hot rolled and uncoated, so surface corrosion can occur over time; apply paint, galvanizing or other protection for long-term outdoor use.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs the length exactly 48in?\u003c\/strong\u003e\u003cbr\u003eYes, it is supplied as a 48in (4ft) length suitable for projects that need that standard size, though final fitting may require cutting or trimming.\u003c\/p\u003e","brand":"Online Metals","offers":[{"title":"Default Title","offer_id":48749128843483,"sku":"B000H9M2VY","price":175.94,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/51mvzNj-mjL._AC_SL1000_e9eef03e-9990-4240-9730-3c86acc2da69.jpg?v=1778784675","url":"https:\/\/gearmusthave.com\/products\/carbon-steel-square-tubing-4in-x-1-4in-x-48in-heavy-duty-structural","provider":"GearMustHave","version":"1.0","type":"link"}