(五）热轧等边角钢[（YB）166-65]
                                                     b-边宽；d-边厚；r-内圆弧半径
角钢号数 尺      寸  （mm） 截面面积   (cm2) 理论重量  (kg/m) 外表面积      (m2/m)
b d r
2 20 3 3.5 1.132 0.889 0.078
4 1.459 1.145 0.077
2.5 25 3 1.432 1.124 0.098
4 1.859 1.459 0.097
3 30 3 4.5 1.749 1.373 0.117
4 2.276 1.786 0.117
3.6 36 3 2.109 1.656 0.141
4 2.756 2.163 0.141
5 3.382 2.654 0.141
4 40 3 5 2.359 1.852 0.157
4 3.086 2.422 0.157
5 3.791 2.976 0.156
4.5 45 3 5 2.659 2.088 0.177
4 3.486 2.736 0.177
5 4.292 3.369 0.176
6 5.076 3.985 0.176
5 50 3 5.5 2.971 2.332 0.197
4 3.897 3.059 0.197
5 4.803 3.770 0.196
6 5.688 4.465 0.196
5.6 56 3 6 3.343 2.624 0.221
4 4.390 3.446 0.220
5 5.415 4.251 0.220
8 8.367 6.568 0.219
6.3 63 4 7 4.978 3.907 0.248
5 6.143 4.822 0.248
6 7.288 5.721 0.247
8 9.515 7.469 0.247
10 11.657 9.151 0.246
7 70 4 8 5.570 4.372 0.275
5 6.875 5.397 0.275
6 8.160 6.406 0.275
7 9.424 7.398 0.275
8 10.677 8.373 0.274
(7.5) 75 5 9 7.367 5.818 0.295
6 8.797 6.905 0.294
7 10.160 7.976 0.294
8 11.503 9.030 0.294
10 14.126 11.089 0.293
8 80 5 7.912 6.211 0.315
6 9.397 7.376 0.314
7 10.860 8.525 0.314
8 12.303 9.658 0.314
10 15.126 11.874 0.313
9 90 6 10 10.637 8.350 0.354
7 12.301 9.656 0.354
8 13.944 10.946 0.353
10 17.167 13.476 0.353
12 20.306 15.940 0.352
10 100 6 12 11.932 9.366 0.393
7 13.796 10.83 0.393
8 15.638 12.276 0.393
10 19.261 15.120 0.392
12 22.800 17.898 0.391
14 26.256 20.611 0.391
16 29.627 23.257 0.390
11 110 7 15.196 11.928 0.433
8 17.238 13.532 0.433
10 21.261 16.690 0.432
12 25.200 19.782 0.431
14 29.056 22.809 0.431
12.5 125 8 14 19.750 15.504 0.492
10 24.373 19.133 0.491
12 28.912 22.696 0.491
14 33.367 26.193 0.490
14 140 10 27.373 21.488 0.551
12 32.512 25.522 0.551
14 37.567 29.490 0.550
16 42.539 33.393 0.549
16 160 10 16 31.502 24.729 0.630
12 37.441 29.391 0.630
14 43.296 33.987 0.629
16 49.067 38.518 0.629
18 180 12 42.241 33.159 0.710
14 48.806 38.383 0.709
16 55.467 43.542 0.709
18 61.955 48.634 0.708
20 200 14 18 54.642 42.894 0.788
16 62.013 48.680 0.788
18 69.301 54.401 0.787
20 76.505 60.056 0.787
24 90.661 71.168 0.785
注    （1）等边角钢的通常长度：2~4号长3~9m；5~8号长4~12m；9~14号长4~19m；16~20号长6~19m。
        （2）制造钢号：A3，A3F，B3F。
        （3）标记举例：普通碳素钢甲类平炉3号沸腾钢160mmX160mmX16mm的热轧等边角钢的标记为：
                             热轧等边角钢 160x160x16-YB166-65
A3F-YB170-63