Profile: Lone Star Steel Co. is a manufacturer and distributor of quality tubular products. We are an ISO 9001 and 9002 certified company. Our product line includes specialty tubing, line pipe, hot finish, flat roll and star tubular products. We offer the widest size range of precision mechanical tubing in the diameters from ½ to 15 inches. Our StarDOM® and Starloy® are available in such varied grades of steel, thermal treatments and surface finishes that almost any fabricating requirement.