Round steel tube is primarily suited for applications that require good structural and mechanical support. At Ryerson, round steel tube comes in a wide assortment of outside diameters, wall thicknesses and lengths.
Among the most common grades of round steel tube are 1010, 1020, 1026, 1008/1010, 1010/1015, 1010/1020, 4130 and 4140.
Round steel tube is either seamless (which is made by piercing and rotating a heated red hot solid metal bar through the center) or welded. Round steel tube that is ERW (electric resistance welded) is typically produced from low carbon steel grades 1008 or 1010. This product offers good forming qualities and is not typically suited for highly engineered applications.
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