Rectangle Steel Tube, also known as Box Tube or Structural Tube, is a welded structural tubing available in either type A513 or A500 Grade B, depending on its size and wall thickness. Either steel tube is ideal for structural building, steel studs, general fabrication, manufacturing and repairs. A500 Steel Tube is the most common and least expenisve for Hollow Structural Sections (HSS).
Steel Rectangle Tube has a high strength-to-weight ratio, is relatively low in cost and is easily welded, formed, punched and drilled.
Square Steel Tube is welded structural grade tubing available in either type A513 or A500 Grade B, depending on its size and wall thickness. Either steel grade is ideal for all structural applications, for farm equipment, trailers, frames, and racks.
Compared to angles or channels, Square Tube allows for much greater strength and rigidity. This steel shape is easy to weld, cut, form and machine.
Welded Round Steel Tube is a hot rolled electric welded (HREW) A513 round tube used for a variety of applications where accuracy and precision is not a top concern. Round Tube is an alternative to DOM Round Steel below, due to it's lower cost and quality. A raised weld seam is present inside the tube.
Welded Round Tube is found in frame work, columns, handrails, roll cages, gates, and fences. A513 round tube can be cut, formed, machined, and welded.
Higher quality and strength is what makes DOM Round Steel Tube, a fabricators first choice. DOM Tube has the internal weld seam removed creating a smooth surface. DOM Round Steel Tube is drawn over a mandrel to produce a more exact dimension and tolerance. DOM Tube has a smooth finish inside and out.
DOM Round Tube is ideal for more stressful applications such as race cars, motorcycle frames, roll cages, and engine mounts. It is easy to cut, form, machine and weld.
*Not all combinations of wall thicknesses and sizes are available due to manufacturing process. Call for details.
Box Tube is measured in Height x Width x Wall Thickness.
Round Tube is measured by outside dimension and wall thickness.
Tubes are structural metal, used to build things where pipes are generally passageways. Tube is measured by outside diameter (OD), pipe is measured by inside diameter or ID.
You could roll a 1" steel bearing through a 1" nominal pipe, but it would not fit inside a 1" tube. The same bearing would be the outside diameter as the tube.