钢的化学成分及机械性能表表1 中钢规格冷打或冷锻用极低碳钢与中碳合金钢化学成分表钢号化 学 成 分 %CSiMnPSCrAlTiC-CH10.015/0.350.0300.030/C-CH1T0.06C-CH35ACR0.35-0.390.100.60-0.900.0300.010/C-CH40ACR0.40-0.44表2 中钢规格碳素硼钢及铬钒合金硼钢化学成分表钢号化 学 成 分 %CSiMnPSCrVB10B210.18-0.230.100.70-1.000.0300.000510B300.28-0.340.15-0.3510B330.32-0.3610B380.35-0.4250BV180.15-0.200.100.70-1.000.0300.000550BV210.18-0.2350BV300.27-0.3350BV330.32-0.350.15-0.35表3 中钢规格免铅浴韧化线材化学成分表钢号化 学 成 分 %CSiMnPSMLP335K0.29-0.360.10-0.350.60-0.900.0300.035NLP77B0.74-0.810.15-0.350.0250.025NLP82B0.79-0.85表4 JIS G3104 铆钉用钢化学成分表钢 号化 学 成 分 %PSSV3300.0400.040SV440表5 JIS G3105链条用钢化学成分表钢号化 学 成 分 %CSiMnPSSBC3000.130.040.500.0400.040SBC4900.250.15-0.401.00-1.50表6 JIS G3503 被覆焊条心线用钢材化学成分表钢号化 学 成 分 %CSiMnPSCuSWRY110.090.030.35-0.650.0200.0230.20SWRY210.10-0.15表7 JIS G3505 低碳软钢化学成分表钢 号化 学 成 分 %CMnPSSWRM 60.080.600.0450.045SWRM 80.10SWRM 100.08-0.130.30-0.60SWRM 120.10-0.15SWRM 150.13-0.18SWRM 170.15-0.20SWRM 200.18-0.23SWRM 220.20-0.25表12 JIS G4102 镍铬合金钢化学成分表钢号化 学 成 分 %CSiMnPSNiCrSNC2360.320.400.150.350.500.800.0300.0301.001.500.500.90SNC4150.120.180.350.652.002.500.200.50SNC6310.270.352.503.000.601.00SNC8150.120.183.003.500.701.00SNC8360.320.400.601.00表13 JIS G4103 镍铬钼合金钢化学成分表钢号化 学 成 分 %CSiMnPSNiCrMoSNCM2200.170.230.150.350.600.900.0300.0300.400.700.400.650.150.30SNCM2400.380.430.701.00SNCM4150.120.180.400.701.602.00SNCM4200.170.23SNCM4310.270.350.600.900.601.00SNCM4390.360.43SNCM4470.440.50表8 JIS G3505硬钢线材化学成分表钢号化 学 成 分 %CSiMnPSSWRH270.240.310.150.350.300.600.0400.040SWRH320.290.36SWRH370.340.41SWRH42A0.390.460.300.60SWRH42B0.600.90SWRH47A0.440.510.300.60SWRH47B0.600.90SWRH52A0.490.560.300.60SWRH52B0.600.90SWRH57A0.540.610.300.60SWRH57B600.90SWRH62A0.590.660.300.60SWRH62B0.600.90SWRH67A0.640.710.300.600.0300.030SWRH67B0.600.90SWRH72A0.690.760.300.60SWRH72B0.600.90SWRH77A0.740.810.300.60SWRH77B0.600.90SWRH82A0.790.860.300.60SWRH82B0.600.90注:上表之含碳量可由买卖双方协议,由原规定之成分范围上、下限各缩窄0.01%.表14 JIS G4104 铬合金钢化学成分表钢号化 学 成 分 %CSiMnPSCrScr4150.130.180.150.350.600.850.0300.0300.901.20Scr4200.180.23Scr4300.280.33Scr4350.330.38Scr4400.380.43Scr4450.430.48表9 JIS G3507冷打或冷锻用碳钢化学成分表钢号化 学 成 分 %CSiMnPSAlSWRCH6A0.080.100.600.0300.02SWRCH8A0.10SWRCH10A0.080.130.300.60SWRCH12A0.100.15SWRCH15A0.130.18SWRCH16A0.600.90SWRCH18A0.150.20SWRCH19A0.701.00SWRCH20A0.180.230.300.60SWRCH22A0.701.00SWRCH10K0.080.130.100.350.300.600.0300.035/SWRCH12K0.100.15SWRCH15K0.130.18SWRCH16K0.600.90SWRCH17K0.150.200.300.60SWRCH18K0.600.90SWRCH20K0.180.230.300.60SWRCH22K0.701.00SWRCH24K0.190.251.351.65SWRCH25K0.220.280.300.60SWRCH27K0.220.291.201.50SWRCH30K0.270.330.600.90SWRCH33K0.300.36SWRCH35K0.320.38SWRCH38K0.350.41SWRCH40K0.370.43SWRCH41K0.360.441.351.65SWRCH43K0.400.460.601.90SWRCH45K0.420.48SWRCH48K0.450.51SWRCH50K0.470.53钢号化 学 成 分 %CSiMnPSS 10 C0.080.130.150.350.300.600.0300.035S 12 C0.100.15S 15 C0.130.18S 17 C0.150.20S 20 C0.180.23S 22 C0.200.25S 25 C0.220.28S 28 C0.250.310.600.90S 30 C0.270.33S 33 C0.300.36S 35 C0.320.38S 38 C0.350.41S 40 C0.370.43S 43 C0.400.46S 45 C0.420.48S 48 C0.450.51S 50 C0.470.53S 53 C0.500.56S 55 C0.520.58S 58 C0.550.61S 09 CK0.070.120.150.350.300.600.0250.025S 15 CK0.130.18S 20 CK0.180.23注:S09CK,S15CK及S20CK之不纯物不得超过Cu 0.25%,Cr 0.20%,Ni 0.20%,Ni+Cr 0.30%,其余种类之不纯物不得超过Cu 0.30%,Ni 0.20%,Cr 0.20%,Ni+Cr 0.35%。表16 JIS G4106达式 机械构造用锰钢及锰铬合金钢化学成分表钢号