... chains 3.OEM/ODM 4.TS16949;ISO OEM close die forged chain About ZhongshengRizhao Zhongsheng Forging Company Ltd. specializes in ... with 4 forging lines including 2,500MT/1,600MT hot die forging press, 400MT/300MT double plate friction press and ... , 16Mn, 20MnMo, 15MnMo, 12Cr2Mo1, 14Cr1Mo, F304, F316,17-4PH4) Shaft related forgings: 25CrMo4, 42CrMo4, 40CrNiMo, 34CrNi3Mo, 25Cr2Ni4MoV, 18CrNiMo5, 30CrMo, ...