... with very competitive price. Stamping parts - Iorn , brass, S.steel,aluminum Precision forging /Diecasting parts - Zamac , Copper ,Aluminum ... Mechanical testing-Final Maching Investment casting for mining machinery part1.Material: carbon steel, alloy steel, stainless ... casting4.Machining: turning, milling, drilling, grinding, threading, CNC machining, etc.5.Finishing: sand blasting, polishing, plating, ...