1、钢号参考直径与厚度推荐硬度备注HB压痕直径35W10388-3213.1-3.4w20321-2693.4-3.730-40285-2293.6-4.0厚度w20板269-2173.7-4.1厚度W40229-1874.0-4.440w25388-3213.1-3.4表面淬火硬度HRO38W40321-2693.4-3.7w50285-2293.6-4.0厚度w20板285-2413.6-3.9厚度w40241-2073.9-4.245w25477-3882.8-3.1表面淬火硬度：100时HRC4045HRC48W40388-3213.1-3.4w60321-2693.4-3.7W75285

2、-2293.6-4.0厚度w20板321-2693.4-3.7厚度W40板285-2293.6-4.0厚度w60板241-2073.9-4.250W40477-3882.8-3.1钢号参考直径与厚度推荐硬度备注HB压痕直径40Cr30CrMoA3 5CrMo4 0Mn2w30477-3882.8-3.1表面淬火硬度HRC45w50388-3213.1-3.4w80321-2695826-401.75-2.50.5-0.7542.75-3.850.7-1.05418CrNi4WA4.50.8-1.156伞齿轮0.8-1.15635-45渗m7.720.8-1.25435-45碳20Cr2Ni4A

3、(12Cr2Ni4A)5-5.51.4-1.71.3-1.66035-4912Cr271.3-1.760Ni4A:8-91.3-1.71.6-1.91.5-1.86035-4520CrMnTi3.5-4.50.9-1.358-6333-48钢号推荐硬度GCr15HRC58GCr9HRC58钢号模数m渗渗碳层厚mm表面硬度HRC碳氮共渗12CrNi3A20CrMnTi20Cr5612CrNi3A20CrMnTi20Cr4-60.65620Cr2Ni4A12Cr2Ni4A30CrMnTi5820Cr2Ni4A12Cr2Ni4A30CrMnTi4-670.60.7-0.858渗碳钢钢号推荐硬度HB备

4、注18Cr2Ni4WA20Cr2Ni4A375-31118Cr2Ni4WA可制造发动机曲轴变速箱主轴被动轴等20Cr2Ni4A可造齿轮等444-341444-321钢号参考直径与厚度推荐硬度HB备注3 8CrSi4 2CrMo5 5CrNiw30477-388表面淬火硬度：HRC42HRC45HRC48齿轮类415-341带齿发兰盘388-321w80341-285w100321-269w120302-255120285-22930CrMnSiA35CrMnSiA388-302垫圈等321-269摩擦片等285-241套筒拄不锈钢钢号推荐硬度HB备注2Cr13302-2553Cr134Cr13341-285表面淬火硬度：支撑衬套HRC50285-355弹簧钢钢号推荐硬度HRC备注65冷硬钢丝6以下8536-42一般用于厚度不大于15的小截面弹簧薄片或垫圈等38-4847-5460Mn36-42制造大尺寸的弹簧板簧发条簧片等40-4865Mn42-50制造大尺寸的弹簧60Si2Mn60SiMnA41-49适用于板簧60SiMnWA41-49大截面重载弹簧70Si3MnA44-52大截面重载弹簧50CrVA40-48大截面重载弹簧活300c以下