Standard: GB/T 8162 Grade: 10, 20, 35, 45, Q345, 40Mn2 ... . OD: 6-660 mm Length:39.34'/12M.max Standard: GB/T 8162Grade: 10, 20, 35, 45, Q345, 40Mn2, ... Structural Purposes.Surface: Annealed/Pickled/Polished.Ends: Plain ends or Bevel ends.Packing: in bundle,wooden cases,non woven cloth ... or bags,or as required.Test: Eddy current/X-ray test/intergranular ...