... (suspension)line 2) Heat Treatment:Quenching,Tempering Alloy Steel Casting,Lost wax Casting,Truck Parts Alloy Steel Casting,Lost wax Casting,Precision casting 1 ... investment casting,Sodium Silicate Technology,Colloidal Silica 2) Material: Carbon steel, Alloy steel, Stainless steel, Brass, Gray iron, Aluminum, Ductile Iron 3) Molding: Hand ...