表面硬化结构钢(渗碳、氮结构):17NiCrMoS6-4(1.6569) 20NiCrMoS6-4(1.6571) 18CrNiMo7-6(17CrNiMo6)(1.6587) 14NiCrMo13-4(1.6657) 13Cr2(1.7012) 15Cr3(1.7015) 17Cr3(1.7016) 17CrS3(1.7014) 20Cr4(1.7024) 20CrS4(1.7028) 28Cr4(1.7030) 28CrS4(1.7036) 16MnCr5(1.7131) 16MnCrS5(1.7139) 20MnCr5(1.7147) 20MnCrS5(1.7149) 16MnCrB5(1.7160) 18CrMo4(1.7243) 18CrMoS4(1.7244) 15CrMo5 (1.7262) 20CrMo5(1.7264) 23CrMoB3-3(1.7271) 20CrMoS2(20CrMo2)(1.7311) 20MoCr3 (1.7320) ……