... Investment steel Impeller casting 1.Material: ASTM A743,grade CN7M 2.Used in pump ... samples. 1)Material:Stainless steel,Alloy steel,High Nickel and Chromium steel,Carbon steel,Special material as customer ... 's requirement; 202,303,304,316,ASTM A743, grade CN7M, CF8M,CF8,304L,316L,430F ... ,water glass casting and sand casting;3)Standard:ASTM,JIS,DIN,BS;4)Finish:Machining,Welding,Polishing, ...