... Materials: carbon , stainless and alloy steel; 3 Proces: hot forging, machining; 1,name: Flexible forged shafts, heavy shafts,large shaft ... ,materials: carbon,stainless,alloy steel 3,proces: hot forging 4,certificates: ISO9001-2000,GL,Product NameSteel Structure Suspension ... Standard: ASTM A609,EN 12680-1,SEP 1922(IN 1690-T2)Magnetic Testing Standard: ASTM A125,ISO 4986 mining machinery shaft forging