... .Inspection by Dye penetrant Investment steel Impeller castingProduct detailsWe are a supplier of quality metal castings and our businessis to manufacture ... ,Special material as customer's requirement; 202,303,304,316,ASTM A743, grade CN7M, CF8M,CF8,304L,316L,430F,430,440A ... wax casting,water glass casting and sand casting;3)Standard:ASTM,JIS,DIN,BS;4)Finish:Machining,Welding,Polishing,Heat treatment ...