Wear Resistance Steel Plate, Round Bar, Seamless Steel Pipe manufacturer / supplier in China, offering 4140 4130 4340 42CrMo4 Alloy Round Steel Bar Hot Rolled and Hot Forged Processed 6mm to 400mm, Mild Steel Cold Formed S235jr S275jr S355jr S355joh S355j2h Black or Galvanized Steel Profile Square Steel Tube for Building, OEM Precision Pipe Cold Drawn Steel Pipe Steel Grade ASTM A106 A53 Gr. B SAE 1020 20 40cr Sch40 Sch80 Hot Rolled Carbon Steel Seamless Pipe for Oil and Water and so on.