... ,Pre-hardened, Annealed HB=2294.Chemical Composition (%)(For reference Only)CSiMnP≤S≤CrMoNi0.38-0.450. ... 15-0.30≤0.255.Application:Mainly used for making various kinds of machinery,automobile,mining spare ... ,Pre-hardened, Annealed HB=2294.Chemical Composition (%)(For reference Only)CSiMnP≤S≤CrMoNi0.38-0.450. ... 15-0.30≤0.255.Application:Mainly used for making various kinds of machinery,automobile,mining ...