- Introduction
 - Classification and code
 - Similar grades
 - For specification
 
| 
				 Q/BQB313-2009  | 
			
				 JIS G4051-2005  | 
			
				 DIN 17210  | 
		
| 
				 C10  | 
			
				 -  | 
			
				 C10  | 
		
| 
				 C15  | 
			
				 -  | 
			
				 C15  | 
		
| 
				 S09CK  | 
			
				 S09CK  | 
			
				 -  | 
		
| 
				 S15CK  | 
			
				 S15CK  | 
			
				 -  | 
		
	

