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1、轻轨(1)尺寸规格见表133。(2)牌号和化学成分见表134。(3)力学性能见表135。表133轻轨的尺寸规格项目轨型kg/m截面尺寸截面面积A/cm2理论质量W(kg/m)截面特性参数长度/m长度允许偏差/mm轨高底宽头宽头高腰高底高腰厚重心位置惯性矩截面系数回转半径ABCDEFtC/eme/emI/cm4z/cm3i/emmm963.5063.5032.1017.4825.7210.305.9011.398.943.093.2662.4119.102.3357181269.8569.8538.1019.8537.7012.307.5415.5412.203.403.5998.8227.60
2、2.516101579.3779.3742.8622.2243.6513.508.3319.3315.203.894.05156.1038.602.83610182293.6693.6650.8026.9950.0016.6710.7228.3922.304.524.85339.0069.603.457101030107.95107.9560.3330.9557.5519.4512.3038.3230.105.215.59606.00108.003.98注：1.理论质量按密度为7.85g/cm3计算。2.长度尺寸系列：5.0m、5.5m、6.0m、6.5m、7.0m、7.5m、8.0m、8.5
3、m、9m、9.5m、10.0m。表134轻轨的牌号和化学成分钢 类牌号型号kg/m化学成分(质量分数)(%)CSiMnPSChCr碳素钢50Q120.350.600.150.350.400.0450.0500.4055Q300.500.600.150.350.600.900.0450.0500.40低合金钢45SiMnP120.350.550.500.800.601.000.120.0500.4060siMnP300.450.580.500.800.601.000.120.0500.4036CuCrP15300.310.420.500.800.601.000.020.060.0400.100.
4、300.801.20表135轻轨的力学性能牌号型号(kg/m)抗拉强度b/MPa布氏硬度HBS落锤试验牌号型号(kg/m)抗拉强度 b/MPa布氏硬度HBS落锤试验50Q1250siMnP1255Q121530685197不断不裂1530685197不断不裂36CuCrP1530785220不断不裂45SiMnP12铁路用重轨(1)尺寸规格:表130。表130铁路钢轨的尺寸规格38134114681349.538.733483.739967.902431401147014.557.044.653557.6901115.853451451266714.5501521327015.565.851.
5、514643.4291287.354601761507316.577.4560.64757.4091515.409(2)牌号和化学成分见表131。表131铁路钢轨的牌号和化学成分牌号化学成分(质量分数)(%)CSiMnCuSPU710.640.770.130.280.600.900.0500.040U740.670.800.130.280.701.000.0500.040U71Cu0.650.770.150.300.701.000.100.400.0500.040U71Mn0.650.770.150.351.101.500.0400.040U70MnSi0.650.750.851.150.851.150.0400.040U71MnSiCu0.650.770.701.100.801.200.100.400.0400.040(3)力学性能见表132。表132铁路钢轨的力学性能牌号抗拉强度b/MPa伸长率5(%)牌号抗拉强度b/MPa伸长率5(%)U7178510U71Mn8858U747859U70MnSi8858U71Cu7859U71MnSiCu8858注：热锯样轨切取的拉力试样，其试验结果允许伸长率比规定数值降低l%(绝对值)。
