收藏词条 编辑词条 通用冷弯开口型钢(GB/T6723-1986)
(1)型别与代号见表1。
表1 通用楞弯开口型钢的型别与代号
|
名称 |
冷弯等边角钢 |
冷弯不等边角钢 |
冷弯等边槽钢 |
冷弯不等边槽钢 |
冷弯内卷边槽钢 |
冷弯外卷边槽钢 |
冷弯乙型钢 |
冷弯卷边乙型钢 |
|
代号 |
|
|
|
|
|
|
|
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(2)尺寸规格见表2～表10。
表2 冷弯等边角钢的尺寸规格
.jpg)
|
名 称 |
尺 寸/mm |
理论质量 /(kg/m) |
截面面积/cm2 |
|
|
b×b×t |
b |
t |
||
|
20× 20×1.2 |
20 |
1.2 |
0.354 |
O.451 |
|
20×20×1.6 |
1.6 |
0.463 |
0.589 |
|
|
20×20×2.0 |
2 |
0.566 |
O.721 |
|
|
25×25×1.6 |
25 |
1.6 |
0.588 |
O.749 |
|
25×25×2.0 |
2 |
0.723 |
O.92l |
|
|
25×25×2.5 |
2.5 |
O.885 |
1.127 |
|
|
25×25×3.0 |
3.O |
1.039 |
1.323 |
|
|
30×30×1.6 |
30 |
1.6 |
0.714 |
O.909 |
|
30×30×2.0 |
2 |
O.880 |
1.121 |
|
|
30×30×2.5 |
2.5 |
1.08l |
1.377 |
|
|
30×30×3.O |
3.O |
1.274 |
1.623 |
|
|
40×40×1.6 |
40 |
1.6 |
O.965 |
1.229 |
|
40×40×2.0 |
2 |
1.194 |
1.521 |
|
|
40×40×2.5 |
2.5 |
1.473 |
1.877 |
|
|
40×40×3.0 |
3.O |
1.745 |
2.223 |
|
|
40×40×4.0 |
4 |
2.266 |
2.886 |
|
|
50×50×2.O |
50 |
2.O |
1.508 |
1.92l |
|
50×50×2.5 |
2.5 |
1.866 |
2.377 |
|
|
50×50×3.O |
3.O |
2.216 |
2.823 |
|
|
50×50×4.O |
4.O |
2.894 |
3.686 |
|
|
60×60×2.0 |
60 |
2.O |
1.822 |
2.32l |
|
60×60×2.5 |
2.5 |
2.258 |
2.877 |
|
|
60×60×3.O |
3 |
2.687 |
3.423 |
|
|
60×60×4.O |
4 |
3.522 |
4.486 |
|
|
70×70×3.O |
70 |
3.O |
3.158 |
4.023 |
|
70×70×4.0 |
4.O |
4.15 |
5.286 |
|
|
70×710×5.0 |
5 |
5.11 |
6.5lO |
|
|
80×80×3.O |
3 |
3.629 |
4.623 |
|
|
80×80×4.0 |
80 |
4.O |
4.778 |
6.086 |
|
80×80×5.O |
5.O |
5.895 |
7.51O |
|
|
80×80×6.O |
6.O |
6.982 |
8.895 |
|
|
100×100×3.O |
100 |
3.O |
4.571 |
5.823 |
|
100×100×4.0 |
4.O |
6.034 |
7.686 |
|
|
100×100×5.O |
5.O |
7.765 |
9.51 |
|
|
100×100×6.0 |
6.O |
8.866 |
11.295 |
|
表3 冷弯不等边角钢的尺寸规格
.jpg)
|
名 称 |
尺 寸/mm |
理论质量/(kg/m) |
截面面积/cm2 |
||
|
B×b×t |
B |
b |
t |
||
|
25×15×2.0 |
25 |
15 |
2.O |
O.566 |
0.72l |
|
25×15×2.5 |
2.5 |
0.688 |
0.877 |
||
|
25×15×3.O |
3.O |
O.803 |
1.023 |
||
|
30×20×2.O |
30 |
20 |
2.O |
O.732 |
0.921 |
|
30×20×2.5 |
2.5 |
0.885 |
1.127 |
||
|
30×20×3.O |
3.O |
1.039 |
1.323 |
||
|
35×20×2.O |
35 |
2.O |
O.802 |
1.021 |
|
|
35×20×2.5 |
2.5 |
O.983 |
1.252 |
||
|
35×20×3.0 |
3.O |
1.156 |
1.473 |
||
|
40×25 ×2.5 |
40 |
25 |
2.5 |
1.179 |
1.502 |
|
40×25×3.O |
3.O |
1.392 |
1.773 |
||
|
50×30×2.5 |
50 |
30 |
2.5 |
1.473 |
1.877 |
|
50×30×3.O |
3.O |
1.745 |
2.223 |
||
|
50×30×4.0 |
4.O |
2.266 |
2.886 |
||
|
60×40×2.5 |
60 |
40 |
2.5 |
1.866 |
2.377 |
|
60×40×3.0 |
3.O |
2.216 |
2.823 |
||
|
60x40×4.O |
4.0 |
2.894 |
3.686 |
||
|
70×40×3.0 |
70 |
40 |
3.0 |
2.452 |
3.123 |
|
70×40×4.0 |
4.0 |
3.208 |
4.086 |
||
|
80×50×3.O |
80 |
50 |
3.O |
2.923 |
3.723 |
|
80×50×4.0 |
4.0 |
3.836 |
4.886 |
||
|
100×60×3.O |
100 |
60 |
3.0 |
3.629 |
4.623 |
|
100×60×4.0 |
4.0 |
4.778 |
6.086 |
||
|
100×60×5.O |
5.O |
5.895 |
7.510 |
||
|
120×80×4.0 |
120 |
80 |
4.0 |
6.034 |
7.686 |
|
120×80×5.0 |
5.O |
7 465 |
9.510 |
||
|
120×80×6.0 |
6.0 |
8.866 |
11.295 |
||
表4 冷弯等边槽钢的尺寸规格
.jpg)
|
名 称 |
尺 寸/mm |
理论质量/(kg/m) |
截面面积/cm² |
||
|
H×B×t |
H |
B |
t |
||
|
20×10×1.5 |
20 |
10 |
1.5 |
O.401 |
0.511 |
|
20×10×2.0 |
2.0 |
0.505 |
0.643 |
||
|
20×10×2.5 |
2.5 |
O.593 |
O.755 |
||
|
30×10×1.5 |
30 |
1.5 |
O.519 |
O.66l |
|
|
30×10×2.O |
2.O |
O.662 |
O.843 |
||
|
30×lO×2.5 |
2.5 |
O.789 |
1.005 |
||
|
30×30×3.O |
30 |
3.O |
1.843 |
2.347 |
|
|
40×20×2.O |
40 |
20 |
2.O |
1.133 |
1.443 |
|
40×20×2.5 |
2.5 |
1.378 |
1.755 |
||
|
40×20×3.0 |
3.O |
1.607 |
2.047 |
||
|
50×30×2.O |
50 |
30 |
2.0 |
1.604 |
2.043 |
|
50×30×2.5 |
2.5 |
1.967 |
2.505 |
||
|
50×30×3.O |
3.O |
2.314 |
2.947 |
||
|
50×50×3.0 |
50 |
3.O |
3.256 |
4.147 |
|
|
60×30×2.5 |
60 |
30 |
2.5 |
2.163 |
2.755 |
|
60×30×3.0 |
3.0 |
2.549 |
3.247 |
||
|
80×40×2.5 |
80 |
40 |
2.5 |
2.948 |
3.755 |
|
80×40×3.0 |
3.O |
3.49l |
4.447 |
||
|
80×40×4.0 |
4.0 |
4.532 |
5.773 |
||
|
100×50×3.O |
100 |
50 |
3.O |
4.433 |
5.647 |
|
100×50×4.0 |
4.O |
5.788 |
7.373 |
||
|
120×60×3.0 |
120 |
60 |
3.O |
5.375 |
6.847 |
|
120×60×4.O |
4.0 |
7.044 |
8.973 |
||
|
140×60×3.O |
140 |
3.0 |
5.846 |
7.447 |
|
|
140×60×4.O |
4.O |
7.672 |
9.773 |
||
|
140×60×5.O |
5.O |
9.436 |
12.021 |
||
|
160×60×3.O |
160 |
3.O |
6.317 |
8.047 |
|
|
160×60×4.0 |
4.0 |
8.300 |
10.573 |
||
|
160× 60×5.O |
5.O |
lO.221 |
13.021 |
||
|
l60×80×3.O |
3.O |
7.259 |
9.247 |
||
|
160×80×4.O |
4.O |
9.556 |
12.173 |
||
|
160×80×5.O |
5.O |
11.791 |
15.02l |
||
|
180× 80×4.0 |
4.O |
lO.184 |
12.973 |
||
|
180×80×5.O |
5.O |
12.576 |
16.021 |
||
|
200×80×4.O |
4.0 |
10.812 |
13.773 |
||
|
200×80×5.O |
5.0 |
13.361 |
17.021 |
||
|
200×80×6.0 |
6.O |
15.849 |
20.190 |
||
表5 冷弯不等边槽钢的尺寸规格
.jpg)
|
名 称 |
尺 寸/mm |
理论质量/(kg/m) |
截面面积/cm2 |
|||
|
H×B×b×t |
H |
B |
b |
t |
||
|
30×20×lO×3.O |
30 |
20 |
lO |
3.0 |
1.180 |
1.504 |
|
40×32×20×3.O |
40 |
32 |
20 |
1.934 |
2.464 |
|
|
50×32×20×2.5 |
50 |
2.5 |
1.840 |
2.344 |
||
|
50×32×20×3.O |
3.O |
2.169 |
2.764 |
|||
|
50×50×32×2.5 |
50 |
32 |
2.5 |
2.429 |
3.094 |
|
|
60×32×25×2.5 |
60 |
32 |
25 |
2.134 |
2.719 |
|
|
60×32×25×3.O |
3.0 |
2.523 |
3.124 |
|||
|
75×30×15×2.5 |
75 |
30 |
15 |
2.5 |
2.193 |
2.794 |
|
75×30×15×3.0 |
3.O |
2.593 |
3.304 |
|||
|
70×45×15× 3.O |
70 |
45 |
2.829 |
3.604 |
||
|
70×65×35×2.5 |
65 |
35 |
2.5 |
3.174 |
4.044 |
|
|
80×40×20×2.5 |
80 |
40 |
20 |
2.586 |
3.294 |
|
|
80×40×20×3.O |
3.O |
3.064 |
3.904 |
|||
|
100×60×30×3.0 |
100 |
60 |
30 |
4.242 |
5.404 |
|
|
150×60×50×3.0 |
150 |
50 |
5.890 |
7.504 |
||
表6 冷弯内卷边槽钢的尺寸规格
.jpg)
|
名 称 |
尺 寸/mm |
理论质量/(kg/m) |
截面面积/cm2 |
|||
|
H×B×C×t |
H |
B |
C |
t |
||
|
40×40×9×2.5 |
40 |
40 |
9 |
2.5 |
2.323 |
2.960 |
|
60×30×10×2.5 |
60 |
30 |
lO |
2.5 |
2.363 |
3.OlO |
|
60×30×10×3.0 |
3.0 |
2.743 |
3.495 |
|||
|
60×30×15×2.5 |
15 |
2.5 |
2.559 |
3.260 |
||
|
60×30×15×3.O |
3.0 |
2.979 |
3.795 |
|||
|
80×40×15×2.5 |
80 |
40 |
2.5 |
3.344 |
4.260 |
|
|
80×40×15×3.O |
3.0 |
3.921 |
4.995 |
|||
|
80×50×25×2.5 |
50 |
25 |
2.5 |
4.129 |
5.260 |
|
表7 冷弯外卷边槽钢的尺寸规格
.jpg)
|
名 称 |
尺 寸 |
理论质量/(kg/m) |
截面面积/cm2 |
|||
|
H×B×C×t |
H |
B |
C |
t |
||
|
30×30×16×2.5 |
30 |
30 |
16 |
2.5 |
2.0()9 |
2.560 |
|
50×20×15×3.0 |
50 |
20 |
15 |
3.0 |
2.272 |
2.895 |
|
60×25×32×2.5 |
50 |
25 |
32 |
2.5 |
3.030 |
3.860 |
|
60×25×32×3.O |
60 |
25 |
32 |
3.O |
3.544 |
4.515 |
|
80×40×20×4.O |
80 |
40 |
20 |
4.O |
5.296 |
6.746 |
|
100×30×15×3.0 |
100 |
30 |
15 |
3.O |
3.92l |
4.995 |
表8 冷弯z形钢的尺寸规格
.jpg)
|
名 称 |
尺 寸/mm |
理论质量/(kg/m) |
截面面积/cm2 |
||
|
H×B×t |
H |
B |
t |
||
|
80×40×2.5 |
80 |
40 |
2.5 |
2.947 |
3.755 |
|
80×40×3.0 |
3.O |
3.491 |
4.447 |
||
|
100×50×2.5 |
100 |
50 |
2.5 |
3.732 |
4.755 |
|
100×50×3.O |
3.O |
4.433 |
5.647 |
||
表9 冷弯卷边Z形钢的尺寸规格
|
名 称 |
尺 寸 |
理论质量/(kg/m) |
截面面积/cm2 |
|||
|
H×B×C×t |
H |
B |
C |
t |
||
|
100×40×20×2.0 |
100 |
40 |
20 |
2.O |
3.208 |
4.086 |
|
100×40×20×2.5 |
2.5 |
3.933 |
5.01 |
|||
|
120×50×20×2.0 |
120 |
50 |
2.O |
3.836 |
4.886 |
|
|
120×50×20×2.5 |
2.5 |
4.718 |
6.01 |
|||
|
120×50×20×3.O |
3.O |
5.569 |
7.095 |
|||
|
140×50×20×2.5 |
140 |
2.5 |
5.11 |
6.5lO |
||
|
140×50×20×3.0 |
3.O |
6.04 |
7.695 |
|||
|
160×60×20×2.5 |
160 |
60 |
2.5 |
5.895 |
7.5lO |
|
|
160×60×20×3.O |
3.O |
6.982 |
8.895 |
|||
|
160×70×20×2.5 |
2.5 |
6.288 |
8.01 |
|||
|
160×70×20×3.O |
3.O |
7.453 |
9.495 |
|||
|
180×70×20×2.5 |
180 |
70 |
2.5 |
6.68 |
8.5lO |
|
|
180×70×20×3.0 |
3 |
7.924 |
lO.095 |
|||
|
200×70×20×2.5 |
200 |
2.5 |
7.073 |
9.01 |
||
|
200×70×20×3.O |
3.O |
8.395 |
10.695 |
|||
|
230×75×25×3.O |
230 |
75 |
3.O |
9.573 |
12.195 |
|
|
230×75×25×4.0 |
25 |
4.O |
12.518 |
15.946 |
||
|
250x 75×25×3.O |
250 |
3.O |
lO.044 |
12.795 |
||
|
250×75×25×4.O |
4 |
13.146 |
16.746 |
|||
表10 弯曲角部分的内圆弧半径(t-壁厚)
|
所用钢种屈服强度/MPa |
内圆弧半径/mm |
|
|
t≤4.O |
4.O |
|
|
≤235 |
≤1.4t |
≤1.8t |
|
≤275 |
≤1.8t |
≤2.4t |
|
≤350 |
≤2.4t |
≤3.Ot |
|
>350 |
双方协议 |
|
(3)允许偏差见表11～表14。
表11 型钢非自由边长的允许偏差(mm)
|
壁 厚 |
允许偏差 |
|||||
|
<50 |
≥50～<100 |
≥100～<250 |
||||
|
普通精度 |
较高精度 |
普通精度 |
较高精度 |
普通精度 |
较高精度 |
|
|
<3.O |
±1.2 |
±O.75 |
±1.50 |
±1.00 |
士1.50 |
±1.00 |
|
≥3.0～<5.0 |
±1.50 |
±1.00 |
±2.00 |
±1.20 |
||
|
≥5.O～≤8.O |
±2.00 |
±1.25 |
±2.25 |
土1.50 |
||
表12 型钢自由边长的允许偏差(mm)
|
壁 厚 |
允许偏差 |
|||||||
|
<50 |
≥50～<100 |
≥100～<250 |
||||||
|
普通精度 |
较高精度 |
普通精度 |
较高精度 |
普通精度 |
较高精度 |
|||
|
<30 |
±1.60 |
±1.20 |
±2.00 |
±1.50 |
±2.00 |
±1.50 |
||
|
≥3.0～<5.O |
±1.60 |
±1.50 |
±2.00 |
±1.50 |
±2.70 |
±2.00 |
||
|
≥5.0～≤8.O |
土2.70 |
±2.00 |
±2.70 |
±2.00 |
±2.70 |
±2.00 |
||
注：1.两个自由边长相等时，其差不得大于公差的75%。
2.两个自由边长不相等时按较大边长允许偏差执行。
表13 弯曲角度的允许偏差
|
较短边长尺寸/mm |
允许偏差(°) |
较短边长尺寸/mm |
允许偏差(°) |
|
≤10 |
±3.O |
>40～≤80 |
±1.5 |
|
>1O |
±2.0 |
>80 |
±1.O |
表14 长度允许偏差(mm)
|
定尺精度 |
长 度 |
允许偏差 |
|
普通定尺 |
4000～9000 |
+60 O |
|
精确定尺 |
4000～6000 >6000～9000 |
±2 ±3 |
注：1.型钢弯曲度每米不得大于3mm，总弯曲度不得大于总长度的O.30％。
2.型钢不得有明显扭转。