Investment steel Impeller casting 1.Material:ASTM A743,grade CN7M 2.Used in pump ... requirement,drawings or samples. 1)Material:Stainless steel,Alloy steel,High Nickel and Chromium steel,Carbon steel,Special material as customer's requirement; 202 ... wax casting,water glass casting and sand casting;3)Standard:ASTM,JIS,DIN,BS;4)Finish:Machining,Welding,Polishing,Heat treatment ,Zincification;5)Inspection ...