... Die Casting, Centrifugal Casting, Forging and Stamping etc.3) Machining Types: Machined by Round Bar and steel plate, Drilling, Milling, Turning ... ) Standard: ASTM, BF,BS, JIS, UNI, ANSI, ISO etc.valve stem of 303 stainless steel4"API Gate ValveMaterial: Alloy Steel, Stainless ... polished1. We cast and machine stems of different sizes and types.2. The materials include stainless steel, alloy steel and ...