... wall thickness<200, L:300—2000, Max weight:4.5tc. forging ring: D:600—3500,H:100— ... 500, Max weight: 4.2td. forging rectangles: L:100—1600, W:100— ... smelting, forging, heat treatment, machining and testing. 4.We already passed ISO9001-2008, ISO14001-2004, GB/T28001 ... technology team,we produce high level special steels .4)Quality Warranty:Yuanfang established top class Physical and ...