Annealing  | 
                       Quenching  | 
                       Tempering  | 
                       Normalizing  | 
                       Q & T  | 
                     
√  | 
                       √  | 
                       √  | 
                       √  | 
                       √  | 
                     
| C | 
				Si  ≤  | 
			
				Mn  ≤  | 
			
				 P ≤  | 
			
				 S ≤  | 
			Cr | Ni | Mo | Other | 
|---|---|---|---|---|---|---|---|---|
| ≤0.020 | 0.70 | 2.00 | 0.030 | 0.010 | 19.0-21.0 | 24.0-26.0 | 4.00-5.00 | 
				 Cu 1.20-2.00 N ≤0.15  | 
		
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