... Test:UT,MT,Impact test,chemical test. 5.Quality Assurance Using Name:Steel Casting parts PROCESSMATERIALSTANDARDSANDCASTINGGreen SandGrey Iron, Ductile Iron, Malleable Iron ... Resin SandINVESTMENTCASTINGSodium Silicone (Water galss)Stainless Steel, Carbon Steel, Special Alloy Steel Bronze,Brass, AluminumSilica SolFORGINGHammer ForgingStainless Steel, Carbon Steel, Alloy Streel, Brass, AluminumDie ...