熱軋圓鋼和方鋼的尺寸規(guī)格
直徑d (或邊長a) ／mm |
精度組別 |
|
截面面積／cm² |
理論質量(kg／m) |
|
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1組 |
2組 |
3組 |
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圓 鋼 |
方 鋼 |
圓 鋼 |
方 鋼 |
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允許偏差／mm |
|
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5.5 |
±0.20 |
±0.30 |
±0.40 |
..2375 |
0.30 |
0.186 |
0.237 |
|
6 |
0.2827 |
0.36 |
0.222 |
0.283 |
|
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6.5 |
0.3318 |
0.42 |
0.260 |
0.332 |
|
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7 |
0.3848 |
0.49 |
0.302 |
0.385 |
|
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8 |
±0.25 |
±0.35 |
±0.40 |
0.5077 |
0.64 |
0.395 |
0.502 |
|
9 |
0.6362 |
0.81 |
0.499 |
0.636 |
|
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10 |
0.7854 |
1.0 |
0.617 |
0.785 |
|
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*11 |
0.9503 |
1.21 |
0.746 |
0.95 |
|
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12 |
1.131 |
1.44 |
0.888 |
1.13 |
|
|||
13 |
1.327 |
1.69 |
1.04 |
1.33 |
|
|||
14 |
1.539 |
1.96 |
1.21 |
1.54 |
|
|||
15 |
1.767 |
2.25 |
1.39 |
1.77 |
|
|||
16 |
2.011 |
2.56 |
1.58 |
2.01 |
|
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17 |
2.270 |
2.89 |
1.78 |
2.27 |
|
|||
18 |
2.545 |
3.24 |
2.00 |
2.54 |
|
|||
19 |
2.835 |
3.61 |
2.23 |
2.83 |
|
|||
20 |
3.142 |
4.00 |
2.47 |
3.14 |
|
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21 |
±. 30 |
±. 40 |
±. 50 |
3.464 |
4.41 |
2.72 |
3.46 |
|
22 |
3.801 |
4.84 |
2.98 |
3.80 |
|
|||
*23 |
4.155 |
5.29 |
3.26 |
4.15 |
|
|||
24 |
4.524 |
5.76 |
3.55 |
4.52 |
|
|||
25 |
4.909 |
6.25 |
3.85 |
4.91 |
|
|||
26 |
5.309 |
6.76 |
4.17 |
5.31 |
|
|||
*27 |
5.726 |
7.29 |
4.49 |
5.72 |
|
|||
28 |
6.158 |
7.84 |
4.83 |
6.15 |
|
|||
*29 |
6.605 |
8.41 |
5.18 |
6.60 |
|
|||
30 |
7.069 |
9.00 |
5.55 |
7.06 |
|
|||
*31 |
±0.40 |
±0.50 |
±0.60 |
7.548 |
9.61 |
5.93 |
7.54 |
|
32 |
8.042 |
10.24 |
6.31 |
8.04 |
|
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*33 |
8.553 |
10.89 |
6.71 |
8.55 |
|
|||
34 |
9.097 |
11.56 |
7.13 |
9.07 |
|
|||
*35 |
9.621 |
12.25 |
7.55 |
9.62 |
|
|||
36 |
10.18 |
12.96 |
7.99 |
10.2 |
|
|||
38 |
11.34 |
14.44 |
8.90 |
11.3 |
|
|||
40 |
12.57 |
16.00 |
9.86 |
12.6 |
|
|||
42 |
13.85 |
17.64 |
10.9 |
13.8 |
|
|||
45 |
15.90 |
20.25 |
12.5 |
15.9 |
|
|||
48 |
18.10 |
23.04 |
14.2 |
18.1 |
|
|||
50 |
19.64 |
25.00 |
15.4 |
19.6 |
|
|||
53 |
±0.60 |
±. 70 |
±0.80 |
22.06 |
28.09 |
17.3 |
22.. |
|
*55 |
23.76 |
30.25 |
18.6 |
23.7 |
|
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