... DIN.JJIS.BS ect stainless steel pump impeler parts investment casting:1.Quality standard: ISO9001:20002.Technique: silica sol technique3.Material ... combining; Shell made; Module dewaxing; Shell rosting; Conventional casting; Gate removing; Precise finishing; Argon arc welding; Sand blasting; Clearing and finishing ... 304,304L,316,316L,CF8,CF3,CF8M,CF3M,1.4308,1.4408,1.4404,SCS13,SCS14,CD4,5AA etc CS:C20, ...