1.Dia: 100mm-300mm 2.Length: 6m-12m 3.Supply ability: 10000 tons per month 4.Delivery time: 5-60 days 45# S45C 1045 C Si Cr Mn Ni P S Cu0.42-0.50 0.17-0.370.250.50-0.80 0.25 0.035 0.035 45# S45CB 1045 C Si Cr Mn Ni P S Cu0.43-0.48 0.15-0.30.10.70-0.90 0.1 0.0250.020.1 If you are satisfied with our products ,pls send us the specification of the products.