51 Stainless Steel Pipe Net Introduction Common Carbon Cast Steel Ingredients Table No. Chemical Composition (%) C Mn Si P ≤ S ≤ Cr Ni Mo Cu ≤ Residual Element Sum ≯ DT3 (Electrical Pure Iron) ≤ 0.04 ≤ 0.30 ≤ 0.20 0.02 0.02 ≤ 0.10 ≤ 0.20 ≤ 0.20 Al ≤ 0.50 ZG200-400 (ZG15) 0.12 to 0.20 0.50 to 0.80 0.20 to 0.45 0.04 0.04 ≤ 0.35 ≤ 0.30 ≤ 0.20 0.3 1 ZG230-450 (ZG25) 0.22 to 0.30 0.50 to 0.80 0.20 to 0.45 0.04 0.04 ≤ 0.35 ≤ 0.30 ≤ 0.20 0.3 1 ZG270-500 (ZG35) 0.32 to 0.40 0.50 to 0.80 0.20 to 0.45 0.04 0.04 ≤ 0.35 ≤ 0.30 ≤ 0.20 0.3 1 ZG310-570 (ZG45) 0.42 to 0.50 0.50 to 0.80 0.20 to 0.45 0.04 0.04 ≤ 0.35 ≤ 0.30 ≤ 0.20 0.3 1