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<40477-3882.8-3.1参考直推荐硬度钢号径与厚备注度HB压痕直径^<30477-3882.8-3.1表面40Cr^<50388-3213.1-3.4淬火30CrMoAe<8o321-269硬度35CrMoe40Mn245合金铸钢钢号推荐硬度范围布氏硬度HB压痕直径ZG32MnMoZG32MnMo1321-2693.4-3.7285-2413.6-3.9255-2173.8-4.1铸钢钢号推荐硬度范围布氏硬度HB压痕直径ZG35(ZG270-500)ZG45(ZG310-570)ZG55(ZG340-640)参照碳素中碳钢参照碳素中碳钢钢号模数m渗渗碳层厚mm表面硬度HRC芯部硬度HRC渗碳12CrNi3A3.0-4.50.6-0.9>5826-401.75-2.50.5-0.7>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渗厚mm硬度HRC碳12CrNi3A<40.5-0.8>56氮20CrMnTi共20Cr渗12CrNi3A4-6>0.6>5620CrMnTi20Cr20Cr2N4A<40.5-0.8>5812Cr2N4A30CrMnTi20Cr2N4A4-6>0.6>5812Cr2N4A>70.7-0.830CrMnTi渗碳钢钢号推荐硬度备注HB18Cr2Ni4WA375-31118Cr2Ni4WA可制造20Cr2Ni4A444-341发动机曲轴\变速箱444-321主轴\被动轴等20Cr2Ni4A可造齿轮等钢号参考直径与厚度推荐硬度HB备注38CrSi42CrMo45CrNi^<30477-388表面淬火硬度：HRC>42HRC>45HRC>48齿轮类415-341坨_Lt告乂带齿友兰盘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e6以下708536-42一般用于厚度不大38-48于15的小截面弹簧\47-54薄片或垫圈等60Mn36-42制造大尺寸的弹簧\40-48板簧\发条\簧片等65Mn42-50制造大尺寸的弹簧60Si2Mn41-49适用于板簧60SiMnA60SiMnWA41-49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42-503009以下工作的弹簧45CrNiMoVA41-47弹性轴类60Si2CrV50CrMnVA55SiMnMoV55SiMnMoB45-52大截面重载弹簧
