... investment casting,Sodium Silicate Technology,Colloidal Silica 2) Material: Carbon steel, Alloy steel, Stainless steel, Brass, Gray iron, Aluminum, Ductile Iron 3) Molding: Hand ... casting / Gears / Pipe fittings...9) Manufacturer certification: ISO9001 (2000) / TS16949 Steel Casting,Stainless steel Casting,Investment Casting