Annealing  | 
                       Quenching  | 
                       Tempering  | 
                       Normalizing  | 
                       Q & T  | 
                     
√  | 
                       √  | 
                       √  | 
                       √  | 
                       √  | 
                     
| Element | Weight % | 
| C | 0.17-0.22 | 
| Mn | 0.70-0.90 | 
| P | 0.035 (max) | 
| S | 0.04 (max) | 
| Si | 0.15-0.30 | 
| Cr | 0.70-0.90 | 
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