Dimensions - HS: HSS - CSA G40 Round
Welcome to our HSS Round (CSA G40) dimension page. Here you'll find outside diameter and wall/design thickness for every round HSS section in this grade, sourced from the CISC Structural Section Tables (CISC 12). Sort by any column and click through to download a CAD block.
| Designation (metric) | Designation (imperial) | Outer diameter (mm) | Wall thickness (mm) | Design wall thickness (mm) | Mass per length (kg/ | Weight per length (imperial) (lb/ | Theoretical cross-sectional area (mm) |
|---|---|---|---|---|---|---|---|
| Ds_m | Ds_i | D | T | Tdes | Mass | Wt_i | A_Th |
| HS711x25 | HS28x1.000 | 711.2 | 25.4 | 25.4 | 430 | 289 | 54700 |
| HS711x19 | HS28x0.750 | 711.2 | 19.05 | 19.05 | 325 | 219 | 41400 |
| HS711x13 | HS28x0.500 | 711.2 | 12.7 | 12.7 | 219 | 147 | 27900 |
| HS610x25 | HS24x1.000 | 609.6 | 25.4 | 25.4 | 366 | 246 | 46600 |
| HS610x19 | HS24x0.750 | 609.6 | 19.05 | 19.05 | 277 | 186 | 35300 |
| HS610x13 | HS24x0.500 | 609.6 | 12.7 | 12.7 | 187 | 126 | 23800 |
| HS610x9.5 | HS24x0.375 | 609.6 | 9.53 | 9.53 | 141 | 94.7 | 18000 |
| HS508x25 | HS20x1.000 | 508 | 25.4 | 25.4 | 302 | 203 | 38500 |
| HS508x19 | HS20x0.750 | 508 | 19.05 | 19.05 | 230 | 154 | 29300 |
| HS508x13 | HS20x0.500 | 508 | 12.7 | 12.7 | 155 | 104 | 19800 |
| HS508x9.5 | HS20x0.375 | 508 | 9.53 | 9.53 | 117 | 78.7 | 14900 |
| HS508x6.4 | HS20x0.250 | 508 | 6.35 | 6.35 | 78.6 | 52.8 | 10000 |
| HS457x25 | HS18x1.000 | 457.2 | 25.4 | 25.4 | 270 | 182 | 34500 |
| HS457x19 | HS18x0.750 | 457.2 | 19.05 | 19.05 | 206 | 138 | 26200 |
| HS457x13 | HS18x0.500 | 457.2 | 12.7 | 12.7 | 139 | 93.6 | 17700 |
| HS457x9.5 | HS18x0.375 | 457.2 | 9.53 | 9.53 | 105 | 70.7 | 13400 |
| HS457x6.4 | HS18x0.250 | 457.2 | 6.35 | 6.35 | 70.6 | 47.4 | 8990 |
| HS406x25 | HS16x1.000 | 406.4 | 25.4 | 25.4 | 239 | 160 | 30400 |
| HS406x19 | HS16x0.750 | 406.4 | 19.05 | 19.05 | 182 | 122 | 23200 |
| HS406x16 | HS16x0.625 | 406.4 | 15.88 | 15.88 | 153 | 103 | 19500 |
| HS406x13 | HS16x0.500 | 406.4 | 12.7 | 12.7 | 123 | 82.9 | 15700 |
| HS406x9.5 | HS16x0.375 | 406.4 | 9.53 | 9.53 | 93.3 | 62.6 | 11900 |
| HS406x6.4 | HS16x0.250 | 406.4 | 6.35 | 6.35 | 62.6 | 42.1 | 7980 |
| HS356x19 | HS14x0.750 | 355.6 | 19.05 | 19.05 | 158 | 106 | 20100 |
| HS356x16 | HS14x0.625 | 355.6 | 15.88 | 15.88 | 133 | 89.4 | 16900 |
| HS356x13 | HS14x0.500 | 355.6 | 12.7 | 12.7 | 107 | 72.2 | 13700 |
| HS356x9.5 | HS14x0.375 | 355.6 | 9.53 | 9.53 | 81.3 | 54.6 | 10400 |
| HS356x6.4 | HS14x0.250 | 355.6 | 6.35 | 6.35 | 54.7 | 36.8 | 6970 |
| HS324x19 | HS12.75x0.750 | 323.9 | 19.05 | 19.05 | 143 | 96.2 | 18200 |
| HS324x16 | HS12.75x0.625 | 323.9 | 15.88 | 15.88 | 121 | 81 | 15400 |
| HS324x13 | HS12.75x0.500 | 323.9 | 12.7 | 12.7 | 97.5 | 65.5 | 12400 |
| HS324x9.5 | HS12.75x0.375 | 323.9 | 9.53 | 9.53 | 73.9 | 49.6 | 9410 |
| HS324x6.4 | HS12.75x0.250 | 323.9 | 6.35 | 6.35 | 49.7 | 33.4 | 6330 |
| HS273x13 | HS10.75x0.500 | 273.1 | 12.7 | 12.7 | 81.6 | 54.8 | 10400 |
| HS273x9.5 | HS10.75x0.375 | 273.1 | 9.53 | 9.53 | 61.9 | 41.6 | 7890 |
| HS273x7.9 | HS10.75x0.313 | 273.1 | 7.94 | 7.94 | 51.9 | 34.9 | 6610 |
| HS273x6.4 | HS10.75x0.250 | 273.1 | 6.35 | 6.35 | 41.8 | 28.1 | 5320 |
| HS273x4.8 | HS10.75x0.188 | 273.1 | 4.78 | 4.78 | 31.6 | 21.2 | 4030 |
| HS245x9.5 | HS9.625x0.375 | 244.5 | 9.53 | 9.53 | 55.2 | 37.1 | 7030 |
| HS245x6.4 | HS9.625x0.250 | 244.5 | 6.35 | 6.35 | 37.3 | 25.1 | 4750 |
| HS219x13 | HS8.625x0.500 | 219.1 | 12.7 | 12.7 | 64.6 | 43.4 | 8230 |
| HS219x9.5 | HS8.625x0.375 | 219.1 | 9.53 | 9.53 | 49.3 | 33.1 | 6270 |
| HS219x6.4 | HS8.625x0.250 | 219.1 | 6.35 | 6.35 | 33.3 | 22.4 | 4240 |
| HS219x4.8 | HS8.625x0.188 | 219.1 | 4.78 | 4.78 | 25.3 | 17 | 3220 |
| HS178x13 | HS7x0.500 | 177.8 | 12.7 | 12.7 | 51.7 | 34.7 | 6590 |
| HS178x9.5 | HS7x0.375 | 177.8 | 9.53 | 9.53 | 39.5 | 26.6 | 5040 |
| HS168x13 | HS6.625x0.500 | 168.3 | 12.7 | 12.7 | 48.7 | 32.7 | 6210 |
| HS168x9.5 | HS6.625x0.375 | 168.3 | 9.53 | 9.53 | 37.3 | 25.1 | 4750 |
| HS168x6.4 | HS6.625x0.250 | 168.3 | 6.35 | 6.35 | 25.4 | 17 | 3230 |
| HS168x4.8 | HS6.625x0.188 | 168.3 | 4.78 | 4.78 | 19.3 | 12.9 | 2460 |
| HS152x7.9 | HS6x0.313 | 152.4 | 7.94 | 7.94 | 28.3 | 19 | 3600 |
| HS152x6.4 | HS6x0.250 | 152.4 | 6.35 | 6.35 | 22.9 | 15.4 | 2910 |
| HS141x13 | HS5.563x0.500 | 141.3 | 12.7 | 12.7 | 40.3 | 27.1 | 5130 |
| HS141x9.5 | HS5.563x0.375 | 141.3 | 9.53 | 9.53 | 31 | 20.8 | 3950 |
| HS141x6.4 | HS5.563x0.250 | 141.3 | 6.35 | 6.35 | 21.1 | 14.2 | 2690 |
| HS127x9.5 | HS5x0.375 | 127 | 9.53 | 9.53 | 27.6 | 18.5 | 3520 |
| HS127x7.9 | HS5x0.313 | 127 | 7.94 | 7.94 | 23.3 | 15.7 | 2970 |
| HS127x6.4 | HS5x0.250 | 127 | 6.35 | 6.35 | 18.9 | 12.7 | 2410 |
| HS114x6.4 | HS4.5x0.250 | 114.3 | 6.35 | 6.35 | 16.9 | 11.4 | 2150 |
| HS114x4.8 | HS4.5x0.188 | 114.3 | 4.78 | 4.78 | 12.9 | 8.67 | 1640 |
| HS102x6.4 | HS4x0.250 | 101.6 | 6.35 | 6.35 | 14.9 | 10 | 1900 |
| HS102x4.8 | HS4x0.188 | 101.6 | 4.78 | 4.78 | 11.4 | 7.66 | 1450 |
| HS89x6.4 | HS3.5x0.250 | 88.9 | 6.35 | 6.35 | 12.9 | 8.69 | 1650 |
| HS89x4.8 | HS3.5x0.188 | 88.9 | 4.78 | 4.78 | 9.92 | 6.66 | 1260 |
| HS89x3.2 | HS3.5x0.125 | 88.9 | 3.18 | 3.18 | 6.72 | 4.51 | 856 |
| HS76x6.4 | HS3x0.250 | 76.2 | 6.35 | 6.35 | 10.9 | 7.35 | 1390 |
| HS76x4.8 | HS3x0.188 | 76.2 | 4.78 | 4.78 | 8.42 | 5.65 | 1070 |
| HS76x3.2 | HS3x0.125 | 76.2 | 3.18 | 3.18 | 5.73 | 3.84 | 729 |
| HS73x6.4 | HS2.875x0.250 | 73 | 6.35 | 6.35 | 10.4 | 7.02 | 1330 |
| HS73x4.8 | HS2.875x0.188 | 73 | 4.78 | 4.78 | 8.04 | 5.4 | 1020 |
| HS73x3.2 | HS2.875x0.125 | 73 | 3.18 | 3.18 | 5.48 | 3.68 | 698 |
| HS64x6.4 | HS2.5x0.250 | 63.5 | 6.35 | 6.35 | 8.95 | 6.01 | 1140 |
| HS64x4.8 | HS2.5x0.188 | 63.5 | 4.78 | 4.78 | 6.92 | 4.65 | 882 |
| HS64x3.2 | HS2.5x0.125 | 63.5 | 3.18 | 3.18 | 4.73 | 3.17 | 603 |
| HS60x6.4 | HS2.375x0.250 | 60.3 | 6.35 | 6.35 | 8.45 | 5.68 | 1080 |
| HS60x4.8 | HS2.375x0.188 | 60.3 | 4.78 | 4.78 | 6.54 | 4.4 | 834 |
| HS60x3.2 | HS2.375x0.125 | 60.3 | 3.18 | 3.18 | 4.48 | 3.01 | 571 |
| HS48x4.8 | HS1.9x0.188 | 48.3 | 4.78 | 4.78 | 5.13 | 3.44 | 654 |
| HS48x3.2 | HS1.9x0.125 | 48.3 | 3.18 | 3.18 | 3.54 | 2.37 | 451 |
| HS42x3.2 | HS1.66x0.125 | 42.2 | 3.18 | 3.18 | 3.06 | 2.05 | 390 |