... Ductile Iron Process: Resin Sand Casting Machined by CNC and Vertical Lathe Controlled by CMM Machine Pump Frame The material ... the products as follows:1) Materials include: Stainless Steel, Carbon Steel, Alloy Steel, Ductile Iron, Grey Iron, Copper, Aluminum Bronze, ... Machined by Round Bar and steel plate, Drilling, Milling, Turning, Boring, Slating, Grinding,, NC/CNC Machining etc.4) Tolerance is ...