Steel Round BarChina Hot Rolled Q235 St37 C45 42CrMo SAE 1045 1040 Dia 10/15/16/20/25 mm Carbon Steel Round/Square Bar High Quality, Find details about China Hot Rolled, Carbon Steel Round Bar from Hot Rolled Q235 St37 C45 42CrMo SAE 1045 1040 Dia 10/15/16/20/25 mm Carbon Steel Round/Square Bar High Quality