Pump casting 1.Material is stainless steel CF8M,316. 2.Water pressure must reach 100 PSI for 5 minutes. ... steel,Special material as customer's requirement; 202,303,304,316,ASTM A743, grade CN7M, CF8M,CF8,304L,316L,430F,430 ... . We wellcome any inquiry you may have for castings. CF8M,316 Pump Casting