Annealing  | 
                       Quenching  | 
                       Tempering  | 
                       Normalizing  | 
                       Q & T  | 
                     
√  | 
                       √  | 
                       √  | 
                       √  | 
                       √  | 
                     
| 
				C ≤  | 
			
				Si ≤  | 
			
				Mn ≤  | 
			
				P ≤  | 
			
				S ≤  | 
			Cr | Ni | 
|---|---|---|---|---|---|---|
| 0.17-0.23 | 0.40 | 0.60-0.90 | 0.035 | 0.035 | 0.40-0.70 | |
| Mo | Al | Cu | Nb | Ti | V | Ce | 
| 0.30-0.40 | ||||||
| N | Co | Pb | B | Other | ||
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