... :20MT RHS(rectangular hollow section)Standard: BS,GB,ASTM(BS 1387,GB/T 3091-2001,GB/T 3091Material: Q195-Q345,16Mnspecification ... clients’ needsSteel MaterialQ195,Q235,Q215,Q345,16MnStandardGB/T 3901, BS 1387,ASTMApplicationUsed for structure, Accessorize and ConstructionEndsPlainSurface Treatment(1) bared(2 ...