Diameter: 60--500mm Weight is less than 8T Material: 70Cr3MoR,9Cr2MoR,86CrMoV7,MC3 UT standard: JB/T6402---2008 II Used for:skin passmachine Making process: steel ingot-forging-rough machining-UT-2th rough machining-induction quenching-finished machining-oiling-packing-delivery