1. Spec: Dia 60-Dia 2000 2. Material: 9Cr2Mo, 42CrMo,86CrMoV7,MC3,MC5,EN19, SAE 52100, ... ... Roughly specification of forged shafts as follows:specification: diameter 60---2000; length≤9000; weight≤50Tmaterial: 9Cr2Mo, 42CrMo,86CrMoV7,MC3,MC5,EN19 ...