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冷彎等邊角鋼GB6723-86
彎曲部分的內圓弧半徑應符合下表規定
(所有冷彎型材均同)：
| 所有鋼種屈服點N/mm2 | 圓弧半徑r/mm | |
| t≤4.0 | 4.0<t≤8.0 | |
| ≤235 | ≤1.4t | ≤1.8t |
| ≤275 | ≤1.8t | ≤2.4t |
| ≤350 | ≤2.4t | ≤3.0t |
| >350 | 雙方協議 | |
表3-1-62
| 名稱 | 尺寸mm | 理論重量kg/m | 截面面積 | 重心cm | 慣性矩/cm4 | 回轉半徑/cm | 截面模數/cm3 | ||||||
| b×b×t | - | t | cm2 | Y0 | Ix=Iy | Iu | Iv | rx=ry | ru | rv | Wxmax=Wymax | Wymin=Wxmin | |
| 20×20×1.220×20×1.620×20×2.0 | 20 | 1.21.62.0 | 0.3540.4630.566 | 0.4510.5890.721 | 0.5590.5790.599 | 0.1790.2300.278 | 0.2920.3770.457 | 0.0660.0840.099 | 0.0630.6250.621 | 0.8040.8000.796 | 0.3850.3770.371 | 0.3210.3980.464 | 0.1250.1620.198 |
| 25×25×1.625×25×2.025×25×2.525×25×3.0 | 25 | 1.62.02.53.0 | 0.5880.7230.8851.039 | 0.7490.9211.1271.323 | 0.7040.7240.7490.774 | 0.4640.5630.6790.786 | 0.7560.9221.1171.298 | 0.1720.2050.2420.275 | 0.7860.7820.7760.770 | 1.0041.0000.9950.990 | 0.4790.4720.4630.456 | 0.6590.7780.9071.106 | 0.2580.3170.3880.455 |
| 30×30×1.630×30×2.030×30×2.530×30×3.0 | 30 | 1.62.02.53.0 | 0.7140.8801.0811.274 | 0.9091.1211.3771.623 | 0.8290.8490.8740.898 | 0.8170.9981.2101.409 | 1.3281.6261.9812.316 | 0.3070.3690.4390.503 | 0.9480.9430.9370.931 | 1.2081.2041.1991.194 | 0.5810.5730.5650.556 | 0.9861.1751.3851.568 | 0.3760.4640.5690.671 |
| 40×40×1.640×40×2.040×40×2.540×40×3.040×40×4.0 | 40 | 1.62.02.53.04.0 | 0.9651.1941.4731.7452.266 | 1.2291.5211.8772.2232.886 | 1.0791.0991.1231.1481.198 | 1.9852.4382.9793.4964.455 | 3.2133.9564.8515.7107.320 | 0.7580.9191.1081.2821.590 | 1.2701.2651.2591.2531.242 | 1.6161.6121.6071.6021.592 | 0.7850.7770.7680.7590.742 | 1.8392.2182.6513.0433.717 | 0.6790.8401.0361.2261.590 |
| 50×50×2.050×50×2.550×50×3.050×50×4.0 | 50 | 2.02.53.04.0 | 1.5081.8662.2162.894 | 1.9212.3772.8233.686 | 1.3491.3731.3981.448 | 4.8485.9527.0159.022 | 7.8459.65811.41414.755 | 1.8502.2452.6163.290 | 1.5881.5821.5761.564 | 2.0202.0152.0102.000 | 0.9810.9710.9620.944 | 3.5934.3325.0156.229 | 1.3271.6411.9482.540 |
| 60×60×2.060×60×2.560×60×3.060×60×4.0 | 60 | 2.02.53.04.0 | 1.8222.2582.6873.522 | 2.3212.8773.4234.486 | 1.5991.6231.6481.698 | 8.47810.44012.34215.970 | 13.69416.90320.02826.030 | 3.2623.9784.6575.911 | 1.9101.9041.8981.886 | 2.4282.4232.4182.408 | 1.1851.1751.1661.147 | 5.3026.4297.4869.403 | 1.9262.3852.8363.712 |
| 70×70×3.070×70×4.070×70×5.0 | 70 | 3.04.05.0 | 3.1584.1505.110 | 4.0235.2866.510 | 1.8981.9481.997 | 19.85325.79931.430 | 32.15241.94451.286 | 7.5539.65411.571 | 2.2212.2092.197 | 2.8262.8162.806 | 1.3701.3511.333 | 10.45613.24215.731 | 3.8915.1076.283 |
| 80×80×3.080×80×4.080×80×5.080×80×6.0 | 80 | 3.04.05.06.0 | 3.6294.7785.8956.982 | 4.6236.0867.5108.895 | 2.1482.1982.2472.297 | 29.92139.00947.67755.938 | 48.38663.29977.62291.365 | 11.45614.71917.73120.512 | 2.5432.5312.5192.507 | 3.2343.2243.2143.204 | 1.5741.5551.5361.518 | 13.92517.74521.20924.346 | 5.1136.7238.2889.809 |
| 100×100×3.0100×100×4.0100×100×5.0100×100×6.0 | 100 | 3.04.05.06.0 | 4.5716.0347.4658.866 | 5.8237.6869.51011.265 | 2.6482.6982.7472.797 | 59.23177.57195.237112.247 | 95.584125.528154.539182.629 | 22.87829.61335.341.866 | 3.1893.1763.1643.152 | 4.0514.0414.0314.021 | 1.9821.9621.9431.925 | 22.36328.74934.65940.125 | 8.05710.62313.13215.584 |
注：1.一般鋼號為Q235-A，20或16Mn等，其力學性能與化學成分應分別符合GB700-88，GB699-88和GBl591-88的規定。
2.通常長度為4～9m。
3.生產冷彎型鋼的主要工廠有：上海鋼鐵工藝技術研究所、南京軋鋼廠、鞍山冷彎型鋼廠、長春冷彎型鋼廠、武鋼漢口軋鋼廠、宜昌冷彎型鋼廠、廣州異型鋼材廠、首鋼帶鋼廠、哈爾濱鋼管廠等。
4.所有冷彎型鋼的斷面形狀和規格尺寸可按用戶需要提供。
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