1、美国常用的齿轮渗碳钢化学成份(%) 标准:AISISAE钢号 C Si Mn P S Ni Cr Mo 4118H0.17~0.230.20~0.350.60~1.00<0.040<0.040 - 0.35~0.650.08~0.154320H0.16~0.230.20~0.350.40~0.70<0.040<0.0401.50~2.000.35~0.65 0.20~0.304620H0.17~0.240.20~0.350.40~0.70<0.040<0.0401.50~2.00 - 0.20~0.304720H0.17~0.230.20~0.350.45~0.