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1、表A1 常用钢种的化学成分 （%）钢 种CSiMnCrNiMo其他200.170.240.170.370.350.65250.220.300.170.370.500.80450.420.500.170.370.500.8040Cr0.370.440.170.370.500.800.801.1045Cr0.420.490.170.370.500.800.801.1030CrMo0.260.330.170.370.400.700.801.100.150.2535CrMo0.320.400.170.370.400.700.801.100.150.2542CrMo0.380.450.170.370.5
2、00.800.901.200.150.2538Crsi0.350.431.001.300.300.601.301.6038CrMoAl0.350.420.200.450.300.601.351.650.150.25A1:0.71.1030CrNiM080.260.340.400.300.601.802.201.802.200.300.5034CrNiM060.300.380.150.400.400.701.401.701.401.700.150.3034CrNi3Mo0.300.400.170.370.500.800.701.102.753.250.250.4036CrNiMo40.320.4
3、00.400.500.800.901.200.901.200.150.3040CrNiMoA0.370.440.170.370.500.800.600.901.251.650.150.2520CrMnTi0.170.230.170.370.801.101.001.30Ti：0.040.1020CrMnMo0.170.230.170.370.901.201.101.400.200.3020MnCr50.170.220.401.101.401.001.3017CrNiMo60.150.200.400.400.601.501.801.401.700.250.3520Cr2NiMo0.170.230.
4、170.370.600.950.400.700.350.750.250.3020CrNi2Mo0.170.230.170.350.400.700.400.651.602.000.150.3012CrNi30.100.170.170.370.300.600.600.902.753.1520Cr2Ni40.170.230.170.370.300.601.251.653.253.6518Cr2Ni4WA0.130.190.170.370.300.601.351.654.004.50W:0.801.20注：1）采用真空脱氧时，Si含量应不超过0.10%；2）未列出的钢号按相应的技术标准执行。表1碳钢铸
5、件的化学成分() 碳钢牌号CMnSiSP残余元素NiCrCuMoVZG2004000.200.800.800.040.040.300.350.300.200.05ZG2304500.300.90ZG2705000.40ZG3105700.500.60ZG3406400.60ZG200400H0.200.800.50ZG230450H0.201.20ZG275485H0.23注：1）牌号末尾有字母“H”的，表示焊接用铸钢件；2）各牌号对上限每减少0.01%的碳，可以增加0.04%的锰，ZG200-400(H)的锰至多为0.01%，ZG230-450H和ZG275-485H的锰增加量不大于20%，
6、其余四个牌号的锰至多为1.20%。3）残余元素总量不大于1.00%，如无另行规定，残余元素可以不进行分析。表4 低合金钢铸件的力学性能（大于等于）低合金钢牌 号热处理状 态ReH(Mpa)Rm(Mpa)A(%)Z(%)冲击吸收功（J）HBAkuAkvAkDVMZG35Mn正火+回火345570122024调 质41564012252727200240ZG40Mn正火+回火2956401230163ZG45Mn2正火+回火3926371530179ZG50Mn2正火+回火4457851837ZG65Mn正火+回火不规定不规定ZG20SiMn295510143039ZG30SiMn正火+回火340
7、590142524调 质390640143039ZG35SiMn正火+回火340570122024ZG35SiMnMo正火+回火395640122024调 质49069012252727ZG30CrMnSi正火+回火3406901430200ZG35CrMnSi正火+回火3456901430217ZG20MnMo正火+回火2954901639156ZG30Cr1MnMo正火+回火3926861530ZG40Cr1正火+回火3456301826212ZG34Cr2Ni2Mo调 质70095010001232240290ZG20CrMo正火+回火245460183030135180调 质24546
8、0183024ZG25CrMo4正火+回火3005507001627调 质5507008501032ZG35Cr1Mo正火+回火392588122023调 质51068612253127200ZG42Cr1Mo正火+回火343569122030调 质4906908301121200250ZG50Cr1Mo调 质5207408801134200260ZG28NiCrMo4206302040ZG30NiCrMo5907301735ZG35NiCrMo6608301430ZG25NiCrMo4正火+回火4007008501520调 质6508009501027注：1.无另行规定时，冲击吸收功的缺口型式由供方任选一种。 2.硬度HB原则上不作为验收依据，供设计参考。1借鉴1%
