1、中华人民共和国国家标准UDC 669.14热轧不等边角钢尺寸、外形、重量及允许偏差GB 9788-88Hot-rolled unequal-leg angle steel-Dimensions,shape,weight and tolerances1主题内容与适用范围本标准规定了热轧不等边角钢的尺寸、外形、重量及允许偏差。本标准适用于热轧不等边角钢。2尺寸及允许偏差2.1截面尺寸及允许偏差2.1.1不等边角钢的截面图示及标注符号如下图所示。XYYB一长边宽度；I一惯性矩；b一短边宽度；W一截面系数；d一边厚度；i一惯性半径；r一内圆弧半径；X0一重心距离；r1一边端内圆弧半径：Y一重心距离2.
2、1.2不等边角钢的尺寸、截面面积、理论重量及截面特性参数应符合表1的规定。中华人民共和国冶金工业部1988-08-09批准1989-07-01实施GB9788-881参考数值Y-YX1-X1Y1-Y1u-uWlyWYIxYoXiutgacm4cmcm3cmcmcm4cmcm+cmcm30.220.440.191.560.860.430.420.140.340.160.3920.270.430.242.090.900.590.460.170.340.200.3810.460.550.303.271.080.820.490.280.430.250.3820.570.540.394.371.121.
3、120.530.350.420.320.3740.930.700.495.391.321.590.590.560.540.400.3851.180.690.638.531.372.140.630.710.540.520.3811.340.790.629.101.472.230.640.800.610.510.3831.700.780.8012.131.513.000.681.020.600.660.3802.020.910.8212.491.603.310.731.200.700.680.4042.580.901.0616.651.654.450.771.530.690.870.4022.92
4、1.031.0517.541.784.700.801.730.790.870.4083.761.021.3723.391.826.330.852.230.791.130.4084.491.011.6529.251.877.940.882.670.781.360.4045.231.141.7033.302.048.630.923.120.881.400.3986.311.122.7141.632.0810.860.953.760.871.710.3967.291.112.4349.982.1213.120.994.340.861.990.3938.241.102.7858.072.1515.47
5、1.034.970.862.290.389GB9788-88参考数值Y-YX1-X1Y1-Y14-4WirWYIxiYoIX1tgacmcmcm3cmcmcmcmcmcmcm37.551.292.1745.922.2412.261.024.400.981.770.4109.131.282.6557.102.2815.391.065.400.982.190.40710.621.263.1268.352.3218.581.096.350.982.590.40412.011.253.5779.992.3621.841.137.160.972.940.40212.611.443.3070.002.40
6、21.041.177.411.102.740.43514.701.423.8884.302.4425.371.218.541.083.190.43518.531.404.99112.502.5234.231.2910.871.074.100.42921.961.386.04140.802.6043.431.3613.101.064.990.42312.821.423.3285.212.6021.061.147.661.102.740.38814.951.413.91102.532.6525.411.188.851.083.200.38716.961.394.48119.332.6929.821
7、.2110.181.083.700.38418.851.385.03136.412.7334.321.2511.381.074.160.38118.321.594.21121.322.9129.531.2510.981.233.490.38521.421.584.96145.592.9535.581.2912.901.234.130.38424.361.575.70169.603.0041.711.3314.671.224.720.38227.151.566.41194.173.0447.931.3616.341.215.290.380GB9788-88续表尺寸mmX-X型号截面面积理论重量外
8、表面积cm2kg/mm2/mBbdixWxcmcmcm369.6177.5500.32099.063.2114.64711.1118.7220.320113.453.2016.8810/6.310063812.5849.8780.319127.373.1819.081015.46712.1420.319153.813.1523.32610.6378.3500.354107.043.1715.19712.3019.6560.354122.733.1617.5210/81008010813.94410.9460.353137.923.1419.811017.16713.4760.353166.873.1224.24610.6378.3500.354133.373.5417.85712.3019.6560.354153.003.5320.6011/711070813.94410.9460.353172.043.5123.301017.16713.4760.353208.393.4828.5414.09611.0660.403227.984.0226.8615.98912.5510.403256.774.0130.4112.5/812580111019.71215.4740.402312.043.9837.331223.35118.3300.402364.413.9544.01
