Annealing  | 
                       Quenching  | 
                       Tempering  | 
                       Normalizing  | 
                       Q & T  | 
                     
√  | 
                       √  | 
                       √  | 
                       √  | 
                       √  | 
                     
| C | 
				Si  ≤  | 
			
				Mn  ≤  | 
			
				 P ≤  | 
			
				 S ≤  | 
			Cr | Ni | Mo | Other | 
|---|---|---|---|---|---|---|---|---|
| ≤0.03 | 1.00 | 3.50-6.50 | 0.030 | 0.015 | 23.0-26.0 | 16.0-19.0 | 3.00-5.00 | 
				N  0.30-0.50 Nb≤0.15  | 
		
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