G12134化学成份：
　　碳C：0.08～0.16 　

　  硅Si：≤0.15 　

　  锰Mn：0.70～1.10

　　硫S：0.15～0.25

　　磷P：0.05～0.10 　

　  铅Pb：0.15～0.35

易切削结构钢                                                    
中国                                                                   国际标准   前苏联    德国       美国       日本       英国       法国      
GB                                                                      ISO    TOCT     DIN UNS       AISI       JIS  BS   NF  
Y12                                                                     Ios20  A12 Ios20      G12120   1212       Sum12    210m15   13mf4    
Y12pb                                                                 Iosb20            Iospb20   G12134   12L13     Sum221            
Y15                                                                     15S20      15S20     G12130   1213       Sum22    220m07   S250      
Y15pb                                                                 Iismnpb28  Ac14       9smnpb28      G12144   12L14     Sum24L       S250pb                                                                         
Y20                                                                     22S20 A20 22s20      G11200   1120       Sum32         18mf5    
Y30                                                                     A30      G11320   1132                       
Y35                                                                     35S20 A35 35S20     G11370   1137            21M3b    35mf6    
Y40mn                                                                44smn28    A40T           G11440   1144       Sum42    225m44   45mf6