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钢号参考直径与厚推荐硬度度HB压痕直径备注40Cr30CrMoA35CrMo40Mn2^<30477-3882.8-3.1表面淬火硬 度HRC>45^<50388-3213.1-3.4e<80321 -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:35-45131.67131.7>608-9131.7>601.6-1.91.5-1.820CrM nTi3.5-4.50.9-1.358-6333-48钢号推荐硬度GCr15HRC>58GCr9HRC>58钢号模数m渗渗碳层厚mm表面硬度HRC碳氮 共 渗12CrNi3A20CrM nTi20Cr<40.5-0.8>5612CrNi3A20CrM nTi20Cr4-6>0.6>5620Cr2Ni4A12Cr2Ni4A30CrM nTi<40.5-0.8>5820Cr2Ni4A12Cr2Ni4A30CrM nTi4-6>7>0.60.7-0.8>58渗碳钢钢号推荐硬度HB备注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备注HB38CrSi42CrMo45CrNi^<30477-388表面淬火硬度：HRC>42HRC>45HRC>48齿轮类415-341-H4-」1- X/ rt-i■带齿发一盘388-321e<80341-285ei20285-22930CrM nSiA35CrM nSiA388-302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冷硬钢丝聲以下708536-42一般用于厚度不大于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60Si2 Mn60SiM nA41-49适用于板簧60Si MnWA41-49大截面重载弹簧70Si3 MnA44-52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60Si2CrV50CrM nVA 55Si MnMoV 55Si MnMoB45-52大截面重载弹簧。