... casting, machining, and forging parts.2. Materials: copper alloy, brass, bronze. 3. Supplying range: Shafts, Sleeves, ... Proof Machining- Quenching & Tempering – Precision MachiningWe can offer you in various process conditions. 5. QA DOC.: Chemical Composition Report, ... SAE, ASTM/ASME, EN, DINcompany profile:Production Rangecopper alloy casting, forging ,investment/precision machining,silica lost wax ...