1. Investment Casting Steel Parts 2. With perfect surface 3. Competitive price 4. Customized designs are available 1. ... Grey Iron,Ductile Iron,alloy steel,stainless steel,etc3.Good surface,Tight tolerance,Fast delivery4.Standard:GB,AISI, BS,DIN, ... making-Pouring-Sand (glass ball)blasting-CNC machining-Inspection-Assembly.8.Surface treatment: painting,polishing, plating, shot blasting, sand blasting.9 ...