55SiMnVB 化学成份
| 
					 
						元素 
				 | 
				
					 
						C 
				 | 
				
					 
						Si 
				 | 
				
					 
						Mn 
				 | 
				S | 
					 
						P 
				 | 
				
					 
						Cr 
				 | 
				Ni | Cu | V | B | 
| 
					 
						含量 
				 | 
				
					 
						0.52~0.60 
				 | 
				
					 
						0.70~1.00 
				 | 
				
					 
						1.00~1.30 
				 | 
				≤0.035 | 
					 
						≤0.035 
				 | 
				≤0.35 | ≤0.35 | ≤0.25 | 0.08~0.16 | 0.0005~0.0035 | 
