High-frequency welded square and rectangular steel pipe (cold-formed hollow steel for structural use)
Applicable to: construction, machinery manufacturing, photovoltaic, furniture, special vehicle frame manufacturing, container manufacturing, decoration, etc.
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High-frequency welded square and rectangular steel pipe (cold-formed hollow steel for structural use)
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Details Introduction
Product Name: High-frequency welded rectangular steel pipe (hollow cold-formed steel for structure)
Executive standard: GB/T6728-2017
Product introduction: Square and rectangular steel pipes manufactured by high-frequency resistance welding and cold-formed.
Applicable: Construction, machinery manufacturing, photovoltaic, furniture, special vehicle frame manufacturing, container manufacturing, decoration, etc.
| Side length mm |
Dimensional tolerance mm |
Wall thickness mm |
Theoretical weight kg/m |
Section area cm² |
Moment of inertia cm 4 |
Radius of gyration cm |
Section modulus cm³ |
Torsion constant | |
| B | ±△ | t | M | A | I x =I y | r x =r y | w x =w y | I t |
C t cm³ |
| 20 | Shi 0.50 | 1.2 1.5 1.75 2.0 |
0.679 0.826 0.941 1.050 |
0.865 1.052 1.199 1.340 |
0.498 0.583 0.642 0.692 |
0.759 0.744 0.732 0.720 |
0.498 0.583 0.642 0.692 |
0.823 0.985 1.106 1.215 |
0.75 0.88 0.98 1.06 |
| 25 | Shi 0.50 | 1.2 1.5 1.75 2.0 |
0.867 1.061 1.215 1.363 |
1.105 1.352 1.548 1.736 |
1.025 1.216 1.357 1.482 |
0.963 0.948 0.936 0.923 |
0.820 0.973 1.086 1.186 |
1.655 1.998 2.261 2.502 |
1.24 1.47 1.65 1.80 |
| 30 | ±0.50 | 1.5 1.75 2.0 2.5 3.0 |
1.296 1.490 1.677 2.032 2.361 |
1.652 1.898 2.136 2.589 3.008 |
2.195 2.470 2.721 3.154 3.500 |
1.152 1.140 1.128 1.103 1.078 |
1.463 1.646 1.814 2.102 2.333 |
3.555 4.048 4.511 5.347 6.060 |
2.21 2.49 2.75 3.20 3.58 |
| 40 | Shi 0.50 | 1.5 1.75 2.0 2.5 3.0 4.0 |
1.767 2.039 2.305 2.817 3.303 4.198 |
2.525 2.598 2.936 3.589 4.208 5.347 |
5.489 6.237 6.939 8.213 9.320 11.064 |
1.561 1.549 1.537 1.512 1.488 1.438 |
2.744 3.118 3.469 4.106 4.660 5.532 |
8.728 10.009 11.238 13.539 15.628 19.152 |
4.13 4.69 5.23 6.21 7.07 8.48 |
| 50 | Shi 0.50 | 1.5 1.75 2.0 2.5 3.0 4.0 |
2.238 2.589 2.933 3.602 4.245 5.454 |
2.852 3.298 3.736 4.589 5.408 6.947 |
11.065 12.641 14.146 16.941 19.463 23.725 |
1.969 1.957 1.945 1.921 1.897 1.847 |
4.426 5.056 5.658 6.776 7.785 9.490 |
17.395 20.025 22.578 27.436 31.972 40.047 |
6.65 7.60 8.51 10.22 11.77 14.43 |
| 60 | Shi 0.60 | 2.0 2.5 3.0 4.0 5.0 |
3.560 4.387 5.187 6.710 8.129 |
4.540 5.589 6.608 8.547 10.356 |
25.120 30.340 35.130 43.539 50.468 |
2.350 2.329 2.305 2.256 2.207 |
8.380 10.113 11.710 14.513 16.822 |
39.810 48.539 56.892 72.188 85.560 |
12.60 15.22 17.65 21.97 25.61 |
| 70 | Shi 0.65 | 2.5 3.0 4.0 5.0 |
5.170 6.129 7.966 9.699 |
6.590 7.808 10.147 12.356 |
49.400 57.522 72.108 84.602 |
2.740 2.714 2.665 2.616 |
14.100 16.434 20.602 24.172 |
78.500 92.188 117.975 141.183 |
21.20 24.74 31.11 36.65 |
| 80 | Shi 0.70 | 2.5 3.0 4.0 5.0 |
5.957 7.071 9.222 11.269 |
7.589 9.008 11.747 14.356 |
75.147 87.838 111.031 131.414 |
3.147 3.122 3.074 3.025 |
18.787 21.959 27.757 32.853 |
118.52 139.660 179.808 216.628 |
28.22 33.02 41.84 49.68 |
| 90 | Shi 0.75 | 3.0 4.0 5.0 6.0 |
8.013 10.478 12.839 15.097 |
10.208 13.347 16.356 19.232 |
127.277 161.907 192.903 220.420 |
3.531 3.482 3.434 3.385 |
28.283 35.979 42.867 48.982 |
201.108 260.088 314.896 365.452 |
42.51 54.17 64.71 74.16 |
| 100 | Shi 0.80 | 4.0 5.0 6.0 |
11.734 14.409 16.981 |
11.947 18.356 21.632 |
226.337 271.071 311.415 |
3.891 3.842 3.794 |
45.267 54.214 62.283 |
361.213 438.986 511.558 |
68.10 81.72 94.12 |
| 110 | Shi 0.90 | 4.0 5.0 6.0 |
12.99 15.98 18.866 |
16.548 20.356 24.033 |
305.94 367.95 424.57 |
4.300 4.252 4.203 |
55.625 66.900 77.194 |
486.47 593.60 694.85 |
83.63 100.74 116.47 |
| 120 | ±0.90 | 4.0 5.0 6.0 8.0 |
14.246 17.549 20.749 26.840 |
18.147 22.356 26.432 34.191 |
402.260 485.441 562.094 696.639 |
4.708 4.659 4.611 4.513 |
67.043 80.906 93.683 116.106 |
635.603 776.632 910.281 1155.010 |
100.75 121.75 141.22 174.58 |
| 130 | Shi 1.00 | 4.0 5.0 6.0 8.0 |
15.502 19.120 22.634 28.921 |
19.748 24.356 28.833 36.842 |
516.97 625.68 726.64 882.86 |
5.117 5.068 5.020 4.895 |
79.534 96.258 111.79 135.82 |
814.72 998.22 1173.6 1502.1 |
119.48 144.77 168.36 209.54 |
| 140 | Shi 1.10 | 4.0 5.0 6.0 8.0 |
16.758 20.689 24.517 31.864 |
21.347 26.356 31.232 40.591 |
651.598 790.523 920.359 1153.735 |
5.524 5.476 5.428 5.331 |
53.085 112.931 131.479 164.819 |
1022.176 1253.565 1475.020 1887.605 |
139.8 169.78 197.9 247.69 |
| 150 | Tu 1.20 | 4.0 5.0 6.0 8.0 |
18.014 22.26 26.402 33.945 |
22.948 28.356 33.633 43.242 |
807.82 982.12 1145.9 1411.8 |
5.933 5.885 5.837 5.714 |
107.71 130.95 152.79 188.25 |
1264.8 1554.1 1832.7 2364.1 |
161.73 196.79 229.84 289.03 |
| 160 | Shi 1.20 | 4.0 5.0 6.0 8.0 |
19.270 23.829 28.285 36.888 |
 24.54730.356 36.032 46.991 |
 987.1521202.317 1405.408 1776.496 |
6.341 6.293 6.245 6.148 |
123.394 150.289 175.676 222.062 |
1540.134 1893.787 2234.573 2876.940 |
185.25 225.79 264.18 333.56 |
| 170 | Shi 1.30 | 4.0 5.0 6.0 8.0 |
20.526 25.400 30.170 38.969 |
26.148 32.356 38.433 49.642 |
1191.3 1453.3 1701.6 2118.2 |
6.750 6.702 6.654 6.532 |
140.15 170.97 200.18 249.2 |
1855.8 2285.3 2701.0 3503.1 |
210.37 256.80 300.91 381.28 |
| 180 | Tu 1.40 | 4.0 5.0 6.0 8.0 |
21.800 27.000 32.100 41.500 |
27.70 34.40 40.80 52.80 |
1422 1737 2.037 2546 |
7.16 7.11 7.06 6.94 |
158 193 226 283 |
2210 2724 3223 4189 |
237 290 340 432 |
| 190 | ±1.50 | 4.0 5.0 6.0 8.0 |
23.00 28.50 33.90 44.00 |
29.30 36.40 43.20 56.00 |
1680 2055 2413 3208 |
7.57 7.52 7.47 7.35 |
176 216 254 319 |
2607 3216 3807 4958 |
265 325 381 486 |
| 200 | Tu 1.60 | 4.0 5.0 6.0 8.0 10 |
24.30 30.10 35.80 46.50 57.00 |
30.90 38.40 45.60 59.20 72.60 |
1968 2410 2833 3566 4251 |
7.97 7.93 7.88 7.76 7.65 |
197 241 283 357 425 |
3049 3763 4459 5815 7072 |
295 362 426 544 651 |
| 220 | Tu 1.80 | 5.0 6.0 8.0 10 12 |
33.2 39.6 51.5 63.2 73.5 |
42.4 50.4 65.6 80.6 93.7 |
3238 3813 4828 5782 6487 |
8.74 8.70 8.58 8.47 8.32 |
294 347 439 526 590 |
5038 5976 7815 9533 11149 |
442 521 668 804 922 |
| 250 | Shi 2.00 | 5.0 6.0 8.0 10 12 |
38.0 45.2 59.1 72.7 84.8 |
48.4 57.6 75.2 92.6 108 |
4805 5672 7229 8707 9859 |
9.97 9.92 9.80 9.70 9.55 |
384 454 578 697 789 |
7443 8843 11598 14197 16691 |
577 681 878 1062 1226 |
| 280 | Shi 2.20 | 5.0 6.0 8.0 10 12 |
42.7 50.9 66.6 82.1 96.1 |
54.4 64.8 84.8 104.6 122.5 |
6810 8054 10317 12479 14232 |
11.2 11.1 11.0 10.9 10.8 |
486 575 737 891 1017 |
10513 12504 16436 20173 23804 |
730 863 1117 1356 1574 |
| 300 | Shi 2.40 | 6.0 8.0 10 12 |
54.7 71.6 88.4 104 |
69.6 91.2 113 132 |
9964 12801 15519 17767 |
12.0 11.8 11.7 11.6 |
664 853 1035 1184 |
15434 20312 24966 29514 |
997 1293 1572 1829 |
| 350 | ±2.80 | 6.0 8.0 10 12 |
64.1 84.2 104 123 |
81.6 107 133 156 |
16008 20618 25189 29054 |
14.0 13.9 13.8 13.6 |
915 1182 1439 1660 |
24683 32557 40127 47598 |
1372 1787 2182 2552 |
| 400 | ±3.20 | 8.0 10 12 14 |
96.7 120 141 163 |
123 153 180 208 |
31269 38216 44319 50414 |
15.9 15.8 15.7 15.6 |
1564 1911 2216 2521 |
48934 60431 71843 82735 |
2362 2892 3395 3877 |
| 450 | ±3.60 | 8.0 10 12 14 |
109 135 160 185 |
139 173 204 236 |
44966 55100 64164 73210 |
18.0 17.9 17.7 17.6 |
1999 2449 2851 3254 |
70043 86629 103150 119000 |
3016 3702 4357 4989 |
| 500 | Shi 4.00 | 8.0 10 12 14 16 |
122 151 179 207 235 |
155 193 228 264 299 |
62172 76341 89187 102010 114260 |
20.0 19.9 19.8 19.7 19.6 |
2487 3054 3568 4080 4570 |
96483 119470 142420 164530 186140 |
3750 4612 5440 6241 7013 |
| Note: The theoretical weight in the table is calculated based on a density of 7.85g/cm³. | |||||||||
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