51 Stainless Steel Pipe Net Introduction Commonly Used Cast Iron Ingredients Table No. Chemical Composition (%) C Mn Si P ≤ S ≤ Mo Cu Re Mg Gray Iron HT200 3.2 to 3.5 0.8 to 1.0 1.5 to 1.8 0.15 0.12 HT300 2.9 to 3.2 0.9 to 1.1 1.2 to 1.5 0.15 0.12 ductile iron QT700-2 3.7-4.0 0.5-0.8 2.3-2.6 0.1 0.02 0.15-0.4 0.4-0.8 0.035-0.065 0.035-0.065 QT600-3 3.6-3.8 0.5-0.7 2.0-2.4 0.08 0.015 0.3 0.8-1.0 0.06- 0.08 wear-resistant heat-resistant cast iron Cr Ni Cu V RTCR16 1.6 to 2.4 ≤ 1.0 1.5 to 2.2 0.1 0.05 15.0 to 18.0 Class A high-chromium cast iron 3.2 to 3.4 0.8 to 1.0 0.8 to 1.0 0.04 0.03 17 to 20 0.15 to 0.25 0.4 to 0.6 0.5 ~ 0.7 B high chromium cast iron 3.8 to 3.0 0.6 to 0.8 0.6 to 0.8 0.04 0.03 25 to 27 0.3 to 0.5
