收藏词条 编辑词条 热轧圆钢和方钢（GB/T702-1986）
热轧圆钢和方钢(GB/T702-1986)
(见表1)
表1 热轧圆钢和方钢的尺寸规格
|
直径d (或边长 a)/mm |
精度组别 |
截面面积/cm? |
理论质量(kg/m) |
|
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|
1组 |
2组 |
3组 |
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|
圆 钢 |
方 钢 |
圆 钢 |
方 钢 |
|||||
|
允许偏差/mm |
|
|||||||
|
5.5 |
士0.20 |
±0.30 |
士0.40 |
O.2375 |
0.30 |
0.186 |
0.237 |
|
|
6 |
0.2827 |
0.36 |
0.222 |
0.283 |
|
|||
|
6.5 |
0.3318 |
0.42 |
0.260 |
0.332 |
|
|||
|
7 |
0.3848 |
0.49 |
0.302 |
0.385 |
|
|||
|
8 |
±0.25 |
±0.35 |
±0.40 |
0.5077 |
0.64 |
0.395 |
0.502 |
|
|
9 |
0.6362 |
0.81 |
0.499 |
0.636 |
|
|||
|
10 |
0.7854 |
1.0 |
0.617 |
0.785 |
|
|||
|
* |
0.9503 |
1.21 |
0.746 |
0.95 |
|
|||
|
12 |
1.131 |
1.44 |
0.888 |
1.13 |
|
|||
|
13 |
1.327 |
1.69 |
1.04 |
1.33 |
|
|||
|
14 |
1.539 |
1.96 |
|
1.54 |
|
|||
|
15 |
1.767 |
2.25 |
1.39 |
1.77 |
|
|||
|
16 |
2.011 |
2.56 |
1.58 |
2.01 |
|
|||
|
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 |
|
|||
|
21 |
±O.30 |
±O.40 |
±O.50 |
3.464 |
4.41 |
2.72 |
3.46 |
|
|
22 |
|
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 |
|
|
|||
|
*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 |
|
5.93 |
7.54 |
|
|
32 |
8.042 |
10.24 |
6.31 |
8.04 |
|
|||
|
*33 |
8.553 |
10.89 |
6.71 |
8.55 |
|
|||
|
34 |
9.097 |
11.56 |
7.13 |
9.07 |
|
|||
|
*35 |
|
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 |
士O.70 |
±0.80 |
22.06 |
28.09 |
17.3 |
22.O |
|
|
*55 |
23.76 |
30.25 |
18.6 |
23.7 |
|
|||
|
56 |
24.63 |
31.36 |
19.3 |
24.6 |
|
|||
|
*58 |
26.42 |
33.64 |
20.7 |
26.4 |
|
|||
|
60 |
±O.60 |
±O.70 |
±0.80 |
28.27 |
36.00 |
22.2 |
28.3 |
|
|
63 |
31.17 |
39.69 |
24.5 |
31.2 |
|
|||
|
*65 |
33.18 |
42.25 |
26.O |
33.2 |
|
|||
|
*68 |
36.32 |
46.24 |
28.5 |
36.3 |
|
|||
|
70 |
38.48 |
49.00 |
30.2 |
38.5 |
|
|||
|
75 |
44.18 |
56.25 |
34.7 |
44.2 |
|
|||
|
80 |
50.27 |
64.00 |
39.5 |
50.2 |
|
|||
|
85 |
±O.9 |
±1.0 |
±1.1 |
56.75 |
72.25 |
44.5 |
56.7 |
|
|
90 |
63.62 |
81.00 |
49.9 |
63.6 |
|
|||
|
95 |
70.88 |
90.25 |
55.6 |
70.8 |
|
|||
|
100 |
78.54 |
100.00 |
61.7 |
78.5 |
|
|||
|
105 |
86.59 |
110.25 |
68.0 |
86.5 |
|
|||
|
110 |
95.03 |
121.00 |
74.6 |
95.0 |
|
|||
|
115 |
±1.2 |
±1.3 |
±1.4 |
103.82 |
132.26 |
81.5 |
104 |
|
|
120 |
113.10 |
144.00 |
88.8 |
113 |
|
|||
|
125 |
122.72 |
156.25 |
96.3 |
123 |
|
|||
|
130 |
132.73 |
169.00 |
104 |
133 |
|
|||
|
140 |
153.94 |
196.00 |
|
154 |
|
|||
|
150 |
176.72 |
225.00 |
139 |
177 |
|
|||
|
160 |
- |
- |
±2.0 |
201.06 |
256.00 |
158 |
201 |
|
|
170 |
226.98 |
289.00 |
178 |
227 |
|
|||
|
180 |
254.47 |
324.00 |
200 |
254 |
|
|||
|
190 |
283.53 |
361.00 |
223 |
283 |
|
|||
|
200 |
- |
- |
士2.5 |
314.16 |
400.00 |
247 |
314 |
|
|
220 |
380.13 |
- |
298 |
- |
|
|||
|
250 |
490.88 |
- |
385 |
- |
|
|||
注：1.表中的理论质量是按钢的密度为7.85g/cm3计算的。
2.表中带“*”号的规格，不推荐使用。