六角钢 hexagonal steel 是型钢的一种，也称之为六角棒，截面为正六边形的棒材。以对边长度S为标称尺寸。<机械设计手册-常用工程材料>及国标《GB 705-89 热轧六角钢和八角刚尺寸、外形、重量及允许偏差》有更多介绍。
六角钢 常用规格尺寸
|
对边距离S mm |
允许偏差， mm |
截面面积A, cm2 |
理论重量， kg/m |
||||
|
1组 |
2组 |
3组 |
六角钢 |
八角钢 |
六角钢 |
八角钢 |
|
|
8 |
±0.25 |
±0.35 |
±0.40 |
0.544 3 |
- |
0.435 |
- |
|
9 |
0.701 5 |
- |
0.551 |
- |
|||
|
10 |
0.866 |
- |
0.680 |
- |
|||
|
11 |
1.048 |
- |
0.823 |
- |
|||
|
12 |
1.247 |
- |
0.979 |
- |
|||
|
13 |
1.464 |
- |
1.15 |
- |
|||
|
14 |
1.697 |
- |
1.33 |
- |
|||
|
15 |
1.949 |
- |
1.53 |
- |
|||
|
16 |
2.217 |
2.120 |
1.74 |
1.66 |
|||
|
17 |
2.503 |
- |
1.96 |
- |
|||
|
18 |
2.808 |
2.683 |
2.20 |
2.16 |
|||
|
19 |
3.126 |
- |
2.45 |
- |
|||
|
20 |
3.464 |
3.312 |
2.72 |
2.60 |
|||
|
21 |
±0.30 |
±0.40 |
±0.50 |
3.819 |
- |
3.00 |
|
|
22 |
4.192 |
4.088 |
3.29 |
3.15 |
|||
|
23 |
4.581 |
- |
3.60 |
- |
|||
|
24 |
4.988 |
- |
3.92 |
- |
|||
|
25 |
5.413 |
5.175 |
4.25 |
4.06 |
|||
|
26 |
5.854 |
- |
4.60 |
- |
|||
|
27 |
6.314 |
- |
4.96 |
- |
|||
|
28 |
6.790 |
6.492 |
5.33 |
5.10 |
|||
|
30 |
7.794 |
7.452 |
6.12 |
5.85 |
|||
|
32 |
±0.40 |
±0.50 |
±0.60 |
8.868 |
8.479 |
6.96 |
6.66 |
|
34 |
10.011 |
9.572 |
7.86 |
7.51 |
|||
|
36 |
11.223 |
10.731 |
8.81 |
8.42 |
|||
|
38 |
12.505 |
11.956 |
9.82 |
9.39 |
|||
|
40 |
13.86 |
13.25 |
10.88 |
10.40 |
|||
|
42 |
15.28 |
- |
11.99 |
- |
|||
|
45 |
17.54 |
- |
13.77 |
- |
|||
|
48 |
19.95 |
- |
15.66 |
- |
|||
|
50 |
21.65 |
- |
17.00 |
- |
|||
|
53 |
±0.60 |
±0.70 |
±0.80 |
24.33 |
- |
19.10 |
- |
|
56 |
27.16 |
- |
21.32 |
- |
|||
|
58 |
29.13 |
- |
22.87 |
- |
|||
|
60 |
31.18 |
- |
24.50 |
- |
|||
|
63 |
34.37 |
- |
26.98 |
- |
|||
|
65 |
36.59 |
- |
28.72 |
- |
|||
|
68 |
40.04 |
- |
31.43 |
- |
|||
|
70 |
42.53 |
- |
33.30 |
- |
|||
六角钢可按结构的不同需要组成各种不同的受力构件，也可作构件之间的连接件。广泛地用于各种建筑结构和工程结构，如房梁、桥梁、输电塔、起重运输机械、船舶、工业炉、反应塔、容器架以及仓库货架等。
