| 六角钢和八角钢的截面尺寸、理论重量及允许偏差 |
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 |
- |
0.435 |
- |
| 9 |
0.701 |
- |
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 |
- |
注:表中的理论重量按密度7.85g/cm3计算。
重量计算公式：六角钢W(kg/m)=0.0068*S2 八角钢W(kg/m)=0.0065*S2
表中截面面积(A)计算公式:A=1/4nS2tgф/2*1/100
六角形A=3/2S2tg300*1/100≈0.866S2*1/100
八角形A=2S2tg22030'*1/100≈0.828S2*1/100 |
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