1、名称：结构用冷弯方形空心型钢标准：GB/T 6728-2002边长允许偏差/mm壁厚 理论重量 截面面积 惯性矩 惯性半径 截面模数 扭转常数厚度t/mm外圆弧半径/mmB/mm t/mm M/(kg/m) A/cm2 Ix=Iy/cm4 rx=ry/cm Wx=Wy/cm3 It/cm4 Ct/cm3碳素钢(s320MPa)低合金钢(s320MPa)FGDA FGXT FGXR20 0.501.2 0.679 0.865 0.498 0.759 0.498 0.823 0.75 t3 1.02.5t 1.52.5t1.5 0.826 1.052 0.583 0.744 0.583 0.985
2、 0.88 3t6 1.52.5t 2.03.0t1.75 0.941 1.199 0.642 0.732 0.642 1.106 0.98 6t10 2.03.0t 2.03.5t2 1.05 1.34 0.692 0.72 0.692 1.215 1.06 t10 2.03.5t 2.54.0t25 0.501.2 0.867 1.105 1.025 0.963 0.82 1.655 1.241.5 1.061 1.352 1.216 0.948 0.973 1.998 1.471.75 1.215 1.548 1.357 0.936 1.086 2.261 1.652 1.363 1.7
3、36 1.482 0.923 1.186 2.502 1.8 定尺精度级别 长度范围/mm 允许偏差/mm30 0.501.5 1.296 1.652 2.195 1.152 1.463 3.555 2.21 普通级别 400012000 (+70,0)1.75 1.49 1.898 2.47 1.14 1.646 4.048 2.49 精确级别 40006000 (+5,0)2 1.677 2.136 2.721 1.128 1.814 4.511 2075 精确级别 600012000 (+10,0)2.5 2.032 2.589 3.154 1.103 2.102 5.347 3.23
4、2.361 3.008 3.5 1.078 2.333 6.06 3.5840 0.501.5 1.767 2.525 5.489 1.561 2.744 8.728 4.131.75 2.039 2.598 6.237 1.549 3.118 10.009 4.692 2.305 2.936 6.939 1.537 3.469 11.238 5.232.5 2.817 3.589 8.213 1.512 4.106 13.539 6.213 3.303 4.208 9.32 1.488 4.66 15.628 7.074 4.198 5.347 11.064 1.438 5.532 19.1
5、52 8.4850 0.501.5 2.238 2.852 11.065 1.969 4.426 17.395 6.651.75 2.589 3.298 12.641 1.957 5.056 20.025 7.62 2.933 3.736 14.146 1.945 5.658 22.578 8.512.5 3.602 4.589 16.941 1.921 6.776 27.436 10.223 4.245 5.408 19.463 1.897 7.785 31.972 11.774 5.454 6.974 23.725 1.847 9.49 40.047 14.4360 0.602 3.56
6、4.54 25.12 2.35 8.38 39.81 12.62.5 4.387 5.589 30.34 2.329 10.113 48.539 15.223 5.187 6.608 35.13 2.305 11.71 56.892 17.654 6.71 8.547 43.539 2.256 14.513 72.188 21.975 8.129 10.356 50.468 2.207 16.822 85.56 25.6170 0.652.5 5.17 6.59 49.4 2.74 14.1 78.5 21.23 6.129 7.808 57.522 2.714 16.434 92.188 2
7、4.744 7.966 10.147 72.108 2.665 20.602 117.975 31.115 9.699 12.356 84.602 2.616 24.172 141.183 36.6580 0.702.5 5.957. 7.589 75.147 3.147 18.787 118.52 28.223 7.071 9.008 87.838 3.122 21.959 139.66 33.024 9.222 11.747 111.031 3.074 27.757 179.808 41.845 11.269 14.356 131.414 3.025 32.853 216.628 49.6
8、890 0.753 8.013 10.208 127.277 3.531 28.283 201.108 42.514 10.478 13.347 161.907 3.482 35.979 260.088 54.175 12.839 16.356 192.903 3.434 42.867 314.896 64.716 15.097 19.232 220.42 3.385 48.982 365.452 74.16100 0.804 11.734 11.947 226.337 3.891 45.267 361.213 68.15 14.409 18.356 271.071 3.842 52.214
9、438.986 81.726 16.981 21.632 311.415 3.794 62.283 511.558 94.12110 0.904 12.99 16.548 305.94 4.3 55.625 486.47 83.635 15.98 20.356 367.95 4.252 66.9 593.6 100.746 18.866 24.033 424.57 4.203 77.194 694.85 116.47120 0.904 14.246 18.147 402.26 4.708 67.043 635.603 100.755 17.549 22.356 485.441 4.659 80
10、.906 776.632 121.756 20.749 26.432 562.094 4.611 93.683 910.281 141.228 26.84 34.191 696.639 4.513 116.106 1155.01 174.58130 1.004 15.502 19.748 516.97 5.117 79.534 814.72 119.485 19.12 24.356 625.68 5.068 96.258 998.22 144.776 22.634 28.833 726.64 5.02 111.79 1173.6 168.368 28.921 36.842 882.86 4.8
11、95 135.82 1502.1 209.54140 1.104 16.758 21.347 651.598 5.524 53.085 1022.18 139.85 20.689 26.356 790.523 5.476 112.931 1253.57 169.786 24.517 31.232 920.359 5.428 131.479 1475.02 197.98 31.864 40.591 1155.735 5.331 164.819 1887.61 247.69150 1.204 18.014 22.948 807.82 5.933 107.71 1264.8 161.735 22.2
12、6 28.356 982.12 5.885 130.95 1554.1 196.796 26.402 33.633 1145.9 5.837 152.79 1832.7 229.848 33.945 43.242 1411.8 5.714 188.25 2364.1 289.03160 1.204 19.27 24.547 987.152 6.341 123.394 1540.13 185.255 23.829 30.356 1202.317 6.293 150.289 1893.79 225.796 28.285 36.032 1405.408 6.245 175.676 2234.57 2
13、64.188 36.888 46.991 1776.496 6.148 222.062 2876.94 333.56170 1.304 20.526 26.148 1191.3 6.75 140.15 1855.8 210.375 25.4 32.356 1453.3 6.702 170.97 2285.3 256.86 30.17 38.433 1701.6 6.654 200.18 2701 300.918 38.969 49.642 2118.2 6.532 249.2 3503.1 381.28180 1.404 21.8 27.7 1422 7.16 158 2210 2375 27
14、 34.4 1737 7.11 193 2724 2906 32.1 40.8 2037 7.06 226 3223 3408 41.5 52.8 2546 6.94 283 4189 432190 1.504 23 29.3 1680 7.57 176 2607 2655 28.5 36.4 2055 7.52 216 3216 3256 33.9 43.2 2413 7.47 254 3807 3818 44 56 3208 7.35 319 4958 486200 1.604 24.3 30.9 1968 7.97 197 3049 2955 30.1 38.4 2410 7.93 24
15、1 3763 3626 35.8 45.6 2833 7.88 283 4459 426130 1.008 46.5 59.2 3566 7.76 357 5815 54410 57 72.6 4251 7.65 425 7072 651220 1.805 33.2 42.4 3238 8.74 294 5038 4426 39.6 50.4 3813 8.7 347 5976 5218 51.5 65.6 4828 8.58 439 7815 66810 63.2 80.6 5782 8.47 526 9533 80412 73.5 93.7 6487 8.32 590 11149 9222
16、50 2.005 38 48.4 4805 9.97 384 7443 5776 45.2 57.6 5672 9.92 454 8843 6818 59.1 75.2 7229 9.8 578 11598 87810 72.7 92.6 8707 9.7 697 14197 106212 84.8 108 9859 9.55 789 16691 1226280 2.205 42.7 54.4 6810 11.2 486 10513 7306 50.9 64.8 8054 11.1 575 12504 8638 66.6 84.8 10317 11 737 16436 111710 82.1
17、104.6 12479 10.9 891 20173 135612 96.1 122.5 14232 10.8 1017 23804 1574300 2.406 54.7 69.6 9964 12 664 15434 9978 71.6 91.2 12801 11.8 853 20312 129310 88.4 113 15519 11.7 1035 24966 157212 104 132 17767 11.6 1184 29514 1829350 2.806 64.1 81.6 16008 14 915 24683 13728 84.2 107 20618 13.9 1182 32557
18、178710 104 133 25189 13.8 1439 40127 218212 123 156 29054 13.6 1660 47598 2552400 3.208 96.7 123 31269 15.9 1564 48934 236210 120 153 38216 15.8 1911 60431 289212 141 180 44319 15.7 2216 71843 339514 163 208 50414 15.6 2521 82735 3877200 1.60450 3.608 109 139 44966 18 1999 70043 301610 135 173 55100
19、 17.9 2449 86629 370212 160 204 64164 17.7 2851 103150 435714 185 236 73210 17.6 3254 119000 4989500 4.008 122 155 62172 20 2487 96483 375010 151 193 76341 19.9 3054 119470 461212 179 228 89187 19.8 3568 142420 544014 207 264 101010 19.7 4080 164530 624116 235 299 114260 19.6 4570 186140 7013描述(D)1.
20、空心型钢系用带钢冷弯后焊接而成。2.一般钢号为Q235-A，20或16Mn等，其力学性能与化学成分应符合GB/T 700，GB/T 699和GB/T 1591的规定。名称：结构用冷弯矩形空心型钢标准：GB/T 6728-2002边长H/mm 边长B/mm 允许偏差/mm 壁厚t/mm 理论重量M/(kg/m) 截面面积A/cm2惯性矩/cm4 惯性半径/cm 截面模数cm3 扭转常数Ix Iy rx ry Wx Wy It/cm4 Ct/cm3FGDA FGDB FGXT 30 20 0.501.5 1.06 1.35 1.59 0.84 1.08 0.788 1.06 0.84 1.83 1
21、.41.75 1.22 1.55 1.77 0.93 1.07 0.777 1.18 0.93 2.07 1.562 1.36 1.74 1.94 1.02 1.06 0.765 1.29 1.02 2.29 1.712.5 1.64 2.09 2.21 1.15 1.03 0.742 1.47 1.15 2.68 1.9540 20 0.501.5 1.3 1.65 3.27 1.1 1.41 0.815 1.63 1.1 2.74 1.911.75 1.49 1.9 3.68 1.23 1.39 0.804 1.84 1.23 3.11 2.142 1.68 2.14 4.05 1.34
22、1.38 0.793 2.02 1.34 3.45 2.362.5 2.03 2.59 4.69 1.54 1.35 0.77 2.35 1.54 4.06 2.723 2.36 3.01 5.21 1.68 1.32 0.748 2.6 1.68 4.57 340 25 0.501.5 1.41 1.8 3.82 1.84 1.46 1.01 1.91 1.47 4.06 2.461.75 1.63 2.07 4.32 2.07 1.44 0.999 2.16 1.66 4.63 2.762 1.83 2.34 4.77 2.28 1.43 0.988 2.39 1.82 5.17 3.07
23、2.5 2.23 2.84 5.57 2.64 1.4 0.965 2.79 2.11 6.15 3.593 2.6 3.31 6.24 2.94 1.37 0.942 3.12 2.35 7 4.0140 30 0.501.5 1.53 1.95 4.38 2.81 1.5 1.199 2.19 1.87 5.52 3.021.75 1.77 2.25 4.96 3.17 1.48 1.187 2.48 2.11 6.31 3.422 1.99 2.54 5.49 3.51 1.47 1.176 2.75 2.34 7.07 3.792.5 2.42 3.09 6.45 4.1 1.45 1
24、.153 3.23 2.74 8.47 4.463 2.83 3.61 7.27 4.6 1.42 1.129 3.63 3.07 9.72 5.0350 25 0.501.5 1.65 2.1 6.65 2.25 1.78 1.04 2.66 1.8 5.52 3.411.75 1.9 2.42 7.55 2.54 1.76 1.024 3.02 2.03 6.32 3.542 2.15 2.74 8.38 2.81 1.75 1.013 3.35 2.25 7.06 3.922.5 2.62 2.34 9.89 3.28 1.72 0.991 3.95 2.62 8.43 4.63 3.0
25、7 3.91 11.17 3.67 1.69 0.969 4.47 2.93 9.64 5.1850 30 0.501.5 1.767 2.252 7.535 3.415 1.829 1.231 3.014 2.276 7.587 3.831.75 2.039 2.598 8.566 3.868 1.815 1.22 3.426 2.579 8.682 4.352 2.305 2.936 9.535 4.291 1.801 1.208 3.814 2.861 9.727 4.842.5 2.817 3.589 11.296 5.05 1.774 1.186 4.518 3.366 11.666
26、 5.723 3.303 4.206 12.827 5.696 1.745 1.163 5.13 3.797 13.401 6.494 4.198 5.347 15.239 6.682 1.688 1.117 6.095 4.455 16.244 7.7750 40 0.501.5 2.003 2.552 9.3 6.602 1.908 1.608 3.72 3.301 12.238 5.2440 20 0.501.75 2.314 2.948 10.603 7.518 1.896 1.596 4.241 3.759 14.059 5.972 2.619 3.336 11.84 8.348 1
27、.883 1.585 4.736 4.192 15.817 6.6732.5 3.21 4.089 14.121 9.976 1.858 1.562 5.648 4.988 19.222 7.9653 3.775 4.808 16.149 11.382 1.833 1.539 6.46 5.691 22.336 9.1234 4.826 6.148 19.493 13.677 1.781 1.492 7.797 6.839 27.82 11.0655 25 0.501.5 1.767 2.252 8.453 2.46 1.937 1.045 3.074 1.968 6.273 3.4581.7
28、5 2.039 2.598 9.606 2.779 1.922 1.034 3.493 2.223 7.156 3.9162 2.305 2.936 10.689 3.073 1.907 1.023 3.886 2.459 7.992 4.34255 40 0.501.5 2.121 2.702 11.674 7.158 2.078 1.627 4.245 3.579 14.017 5.7941.75 2.452 3.123 13.329 8.158 2.065 1.616 4.847 4.079 16.175 6.6142 2.776 3.536 14.904 9.107 2.052 1.6
29、04 5.419 4.553 18.208 7.39455 50 0.50 1.75 2.726 3.473 15.811 13.66 2.133 1.983 5.749 5.464 23.173 8.4152 3.09 3.936 17.714 15.298 2.121 1.971 6.441 6.119 26.142 9.43360 30 0.602 2.62 3.337 15.046 5.078 2.123 1.234 5.015 3.385 12.57 5.8812.5 3.209 4.089 17.933 5.998 2.094 1.211 5.977 3.998 15.054 6.
30、9813 3.774 4.808 20.496 6.794 2.064 1.188 6.832 4.529 17.335 7.954 4.826 6.147 24.691 8.045 2.004 1.143 8.23 5.363 21.141 9.52360 40 0.602 2.934 3.737 18.412 9.831 2.22 1.622 6.137 4.915 20.702 8.1162.5 3.602 4.589 22.069 11.734 2.192 1.595 7.356 5.867 25.045 9.7223 4.245 5.408 25.374 13.456 2.166 1
31、.576 8.458 6.718 29.121 11.1754 5.451 6.947 30.974 16.269 2.111 1.53 10.32 8.134 36.298 13.65370 50 0.602 3.562 4.537 31.475 18.758 2.634 2.033 8.993 7.503 37.454 12.1963 5.187 6.608 44.046 26.099 2.581 1.987 12.58 10.439 53.426 17.064 6.71 8.547 54.663 32.21 2.528 1.941 15.62 12.884 67.613 21.1895
32、8.129 10.356 63.435 37.179 2.171 1.894 18.12 14.871 79.908 24.64280 40 0.702 3.561 4.536 37.355 12.72 2.869 1.674 9.339 6.361 30.881 11.0042.5 4.387 5.589 45.103 15.255 2.84 1.652 11.28 7.627 37.467 13.2833 5.187 6.608 52.246 17.552 2.811 1.629 13.06 8.776 43.68 15.2834 6.71 8.547 64.78 21.474 2.752
33、 1.585 16.2 10.737 54.787 18.84450 40 0.505 8.129 10.356 75.08 24.267 2.692 1.54 18.77 12.283 64.11 21.74480 60 0.703 6.129 7.808 70.042 44.886 2.995 2.397 17.51 14.962 88.111 24.1434 7.966 10.147 87.945 56.105 2.943 2.351 21.98 18.701 112.583 30.3325 9.699 12.356 103.25 65.634 2.89 2.304 25.81 21.8
34、78 134.503 35.67390 40 0.753 5.658 7.208 70.487 19.61 3.127 1.649 15.66 9.805 51.193 17.3394 7.338 9.347 87.894 24.077 3.066 1.604 19.53 12.038 64.32 21.4415 8.914 11.356 102.49 27.651 27.65 3.004 1.56 22.774 13.825 75.42690 50 0.752 4.19 5.337 57.878 23.368 3.293 2.093 12.86 9.347 53.366 15.8822.5
35、5.172 6.589 70.263 28.236 3.266 2.07 15.61 11.294 65.299 19.2353 6.129 7.808 81.845 32.735 3.237 2.047 18.19 13.094 76.433 22.3164 7.966 10.147 102.7 40.695 3.181 2.002 22.42 16.278 97.162 27.9615 9.699 12.356 120.57 47.345 3.123 1.957 26.79 18.938 115.436 36.77490 55 0.75 2 4.346 5.536 61.75 28.957
36、 3.34 2.287 13.73 10.53 62.724 17.6012.5 5.368 6.839 75.049 33.065 3.313 2.264 16.68 12.751 76.877 21.35790 60 0.753 6.6 8.408 93.203 49.764 3.329 2.432 20.71 16.588 104.552 27.3914 8.594 10.947 117.5 62.387 3.276 2.387 26.11 20.795 133.852 34.5015 10.484 13.356 138.65 73.218 3.222 2.311 30.81 24.40
37、6 160.273 40.71295 50 0.75 2 4.347 5.537 66.084 24.521 3.455 2.104 13.91 9.808 57.458 16.8042.5 5.369 6.839 80.306 29.647 3.247 2.082 16.91 11.895 70.324 20.364100 50 0.803 6.69 8.408 106.45 36.053 3.558 2.07 21.29 14.421 88.311 25.0124 8.594 10.947 134.12 44.938 3.5 2.026 26.82 17.975 112.409 31.35
38、5 10.484 13.356 158.16 52.429 3.441 1.981 31.63 20.971 113.758 36.804120 50 0.90 2.5 6.35 8.089 143.97 36.704 4.219 2.13 24 14.682 96.026 26.0063 7.543 9.608 168.58 42.693 4.189 2.108 28.1 17.077 112.87 30.317120 60 0.903 8.013 10.208 189.11 64.398 4.304 2.511 31.58 21.466 156.029 37.1384 10.478 13.
39、347 240.72 81.235 4.246 2.466 40.12 27.078 200.407 47.0485 12.839 16.356 286.94 95.968 4.188 2.422 47.82 31.989 240.869 55.8466 15.097 19.232 327.95 108.72 4.129 2.377 54.66 36.238 277.361 63.597120 80 0.903 8.955 11.408 230.19 123.43 4.491 3.289 38.36 30.857 255.128 50.79980 40 0.704 11.734 11.947
40、294.57 157.28 4.439 3.243 49.09 39.32 330.438 64.9275 14.409 18.356 353.11 187.75 4.385 3.198 58.85 46.936 400.735 77.7726 16.981 21.632 106 214.98 4.332 3.152 67.67 53.744 165.94 83.399140 80 1.004 12.99 16.547 429.58 180.41 5.095 3.301 61.37 45.101 410.713 76.4785 15.979 20.356 517.02 215.91 5.039
41、 3.256 73.86 53.978 498.815 91.8346 18.865 24.032 569.94 247.91 4.983 3.211 85.28 61.976 580.919 105.83150 100 1.204 14.874 18.947 594.59 318.55 5.601 4.11 79.28 63.71 660.613 104.945 18.334 23.356 719.16 383.99 5.549 4.054 95.89 79.797 806.733 126.816 21.691 27.632 834.62 444.14 5.495 4.009 111.3 8
42、8.827 915.022 147.078 28.096 35.791 1039.1 519.31 5.388 3.917 138.5 109.86 1147.71 181.85160 60 1.20 3 9.898 12.608 389.86 83.915 5.561 2.58 48.73 27.972 228.15 50.144.5 14.498 18.469 552.08 116.66 5.468 2.513 69.01 38.886 324.96 70.085160 80 1.204 14.216 18.117 597.69 203.53 5.738 3.348 71.71 50.88
43、3 483.129 88.0315 17.519 22.356 721.65 214.09 5.681 3.304 90.21 61.02 599.175 105.96 20.749 26.433 835.94 286.83 5.623 3.259 104.2 76.208 698.881 122.278 26.81 33.644 1036.5 343.6 5.505 3.17 129.6 85.899 876.599 149.54180 65 1.20 3 11.075 14.108 550.35 111.78 6.246 2.815 61.15 34.393 306.75 61.8494.
44、5 16.264 20.719 784.13 156.47 6.152 2.748 87.13 48.144 438.91 86.993180 100 1.304 16.758 21.317 926.02 373.88 6.586 4.184 102.9 74.755 852.708 127.065 20.689 26.356 1124.2 451.74 6.53 4.14 124.9 90.347 1012.589 153.886 24.517 31.232 1309.5 523.77 6.475 4.095 145.5 104.75 1222.933 178.888 31.861 40.3
45、91 1643.1 651.13 6.362 4.002 182.6 130.23 1554.606 222.49200 100 1.304 18.014 22.941 1199.7 410.26 7.23 4.23 120 82.152 948.151 141.815 22.259 28.356 1459.3 496.91 7.173 4.186 145.9 99.381 1203.878 171.946 26.101 33.632 1703.2 576.86 7.116 4.141 170.3 115.37 1412.986 200.18 34.376 43.791 2146 719.01
46、 7 4.052 214.6 143.8 1789.551 249.6200 120 1.404 19.3 24.5 1353 618 7.43 5.02 135 103 1345 1725 23.8 30.4 1649 750 7.37 4.97 165 125 1652 2106 28.3 36 1929 874 7.32 4.93 193 146 1947 245120 80 0.908 36.5 46.4 2386 1079 7.17 4.82 239 180 2507 308200 150 1.504 21.2 26.9 1584 1021 7.67 6.16 158 136 194
47、2 2195 26.2 33.4 1935 1245 7.62 6.11 193 166 2391 2676 31.1 39.6 2268 1457 7.56 6.06 227 194 2826 3128 40.2 51.2 2892 1815 7.43 5.95 283 242 3664 396220 140 1.504 21.8 27.7 1892 948 8.26 5.84 172 135 1987 2245 27 34.4 2313 1155 8.21 5.8 210 165 2447 2746 32.1 40.8 2714 1352 8.15 5.75 247 193 2891 32
48、18 41.5 52.8 3389 1685 8.01 5.65 308 241 3746 407250 150 1.604 24.3 30.9 2697 1234 9.34 6.32 216 165 2665 2755 30.1 38.4 3304 1508 9.28 6.27 264 201 3285 3376 35.8 45.6 3886 1768 9.23 6.23 311 236 3886 3968 46.5 59.2 4886 2219 9.08 6.12 391 296 5050 504260 180 1.805 33.2 42.4 4121 2350 9.86 7.45 317
49、 261 4695 4266 39.6 50.4 4856 2763 9.81 7.4 374 307 5566 5018 51.5 65.6 6145 3493 9.68 7.29 473 388 7267 64210 63.2 80.6 7363 4174 9.56 7.2 566 646 8850 772300 200 2.005 38 48.4 6241 3361 11.4 8.34 416 336 6836 5526 45.2 57.6 7370 3962 11.3 8.29 491 396 8115 6518 59.1 75.2 9389 5042 11.2 8.19 626 504 10627 83810 72.7 92.6 11313 6058 11.1 8.09 754 606 12987 1012350 250 2.205 45.8 58.4 10520 6306 13.4 10.4 601 504 12234 8176 54.7 69.6 12547 7458 13.4 10.3
