... alloy steel; 3 Proces: hot forging, machining; 1,name: Flexible forged shafts, heavy shafts,large shaft forging 2,materials: carbon,stainless,alloy steel ... 3,proces: hot forging 4,certificates: ISO9001-2000 ... (IN 1690-T2)Magnetic Testing Standard: ASTM A125,ISO 4986 heavy machinery shaft