钢号参考直径与厚度推荐硬度备注HB压痕直径35^<10388-3213.1-3.4^<20321-2693.4-3.7030-040285-2293.6-4.0厚度＜20板269-2173.7-4.1厚度＜40229-1874.0-4.4400<25388-3213.1-3.4表面淬火硬度HRC＞380<40321-2693.4-3.70<50285-2293.6-4.0厚度＜20板285-2413.6-3.9厚度＜40241-2073.9-4.2450<25477-3882.8-3.1表面淬火硬度：0>100时HRC>400<100时HRC>45HRC>480<40388-3213.1-3.40<60321-2693.4-3.70<75285-2293.6-4.0厚度＜20板321-2693.4-3.7厚度＜40板285-2293.6-4.0厚度＜60板241-2073.9-4.2500<40477-3882.8-3.1钢号参考直径与厚度推荐硬度备注HB压痕直径40Cr30CrMoA35CrMo40Mn2^<30477-3882.8-3.1表面淬火硬度HRC>45^<50388-3213.1-3.4e<8o321-269e5826-401.75-2.50.5-0.7>5418CrNi4WA2.75-3.850.7-1.0>544.50.8-1.1>56伞齿轮m>7.720.8-1.1>5635-450.8-1.2>5435-4520Cr2Ni4A(12Cr2Ni4A)5-5.51.4-1.7>6035-4912Cr2Ni4A:35-451.3-1.671.3-1.7>608-91.3-1.7>601.6-1.91.5-1.820CrMnTi3.5-4.50.9-1.358-6333-48钢号推荐硬度GCr15HRC>58GCr9HRC>58钢号模数渗碳层表面m滲厚mm硬度HRC12CrNi3A20CrMnTi<40.5-0.8>56碳20Cr氮12CrNi3A共20CrMnTi4-6>0.6>56渗20Cr20Cr2Ni4A12Cr2Ni4A<40.5-0.8>5830CrMnTi20Cr2Ni4A4-6>0.612Cr2Ni4A>58>70.7-0.830CrMnTi渗碳钢钢号推荐硬度HB备注1 8Cr2Ni4WA2 0Cr2Ni4A375-3111 8Cr2Ni4WA可制造发动机曲轴\变速箱主轴\被动轴等2 0Cr2Ni4A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 2CrMo45CrNi^<30477-388表面淬火硬度：HRC>42HRC>45HRC>48齿轮类415-341-H4-11X/r£i带齿发兰盘388-321①<80341-285①<100321-269①<120302-255^>120285-22930CrMnSiA35CrMnSiA388-302垫圈等321-269摩擦片等285-241套筒托不锈钢钢号推荐硬度HB备注2Cr13302-2553Cr13341-285表面淬火硬度：4Cr13285-355支撑衬套HRC>50弹簧钢钢号推荐硬度HRC备注65冷硬钢丝①6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3009以下工作的弹簧42-5045CrNiMoVA41-47弹性轴类60Si2CrV50CrMnVA55SiMnMoV55SiMnMoB45-52大截面重载弹簧。
