C | 							 Si | 							 Mn | 							 P | 							 S | 							 Cr | 							 Mo | 							 Ni | 		
				 0.28-0.4 | 							 0.2-0.8 | 							 0.6-1 | 							 ≤ 0.03 | 							 ≤ 0.03 | 							 1.4-2 | 							 0.3-0.55 | 							 0.85-1.15 |