... Stainless steel parts: 302, 304, 316 etc.1) Sand casting parts material: Gray iron, ductile iron, malleable iron, aluminum ... , bronze, zinc brass. Prisission casting parts: Middle carbon steel, stainless steel . Bronze.Forged: friction ... -400 kg.3) Manufacture quipment: Cupola, electric furnace, resin-bonded sand equipment, dry sand mix millaer, quake press ...