... 5.Material :steel Cast Trailer Rear Hanger PROCESSMATERIALSTANDARDSAND CASTINGGreen SandGrey Iron, Ductile Iron, Malleable Iron, Stainless Steel, Carbon Steel, Aluminium, Brass, ... SandCold Harden Resin SandINVESTMENT CASTINGSodium Silicone(Water Glass)Stainless Steel, Carbon Steel, Special Alloy Steel, Bronze, Brass, AluminiumSilica SolFORGINGHammer ForgingStainless ...