| ????????????????? | 
                    ??????? ISO | 
                    ??????????? 
                      (g/cm2) | 
                    ?????????????? 
                      (N/mm2) | 
                    ???? 
                      (HRA) | 
                    USE | 
                   
                  
                    | YG8A | 
                    K20 | 
                    14.7 | 
                    1900 | 
                    89.5 | 
                    High strength,impact and shock resistancehigher than   MK6A,but wearresistance and cutting speed comparatively lower,Roughing of cast   irons,non-ferrors metals and their alloys as well as non metallic materials at   low cutting speed.  | 
                   
                  
                    | YG10X | 
                    K40 | 
                    14.5 | 
                    2000 | 
                    91 | 
                    Fine grain alloy,good wear resistance.uesd for processing   hard wood,veneer board,PCB,PVC and metals.  | 
                   
                  
                    | YG15 | 
                    K40 | 
                    14.0 | 
                    2300 | 
                    86.5 | 
                    Conventional wear resistance,high bending strength,used for   steel alloy etc.  | 
                   
                
                |