Investment steel Impeller casting 1.Material: ASTM A743,grade CN7M 2.Used in pump ... material as customer's requirement; 202,303,304,316,ASTM A743, grade CN7M, CF8M,CF8,304L,316L,430F,430 ... wax casting,water glass casting and sand casting;3)Standard:ASTM,JIS,DIN,BS;4)Finish:Machining,Welding,Polishing,Heat ... wellcome any inquiry you may have for castings. ASTM A743 Investment Steel Impeller Casting