This round steel tube sizes chart lists all 189 round HSS in the AISC Shapes Database v16.0, from 1.66 in to 28 in outside diameter, plus the 51 standard steel pipe sizes. Each row gives the wall thickness, weight per foot, area and moment of inertia.
How to Read a Round HSS Size
HSS6.625×0.250 is a round tube with a 6.625 in outside diameter and a 0.250 in nominal wall. Round HSS is sized by its actual outside diameter, while pipe is sized by a nominal pipe size (Pipe 6 STD has a 6.625 in OD). As with square HSS, AISC uses a design wall of 0.93 times nominal for ASTM A500 tube.
Round Steel Tube Sizes: Up to 6.625 in OD
Units
| Size | Outside diameter (in) | Nominal wall (in) | Design wall (in) | Weight (lb/ft) | Area (in²) | I (in⁴) |
|---|---|---|---|---|---|---|
| HSS1.660×0.140 | 1.66 | 0.14 | 0.13 | 2.27 | 0.625 | 0.184 |
| HSS1.900×0.120 | 1.9 | 0.12 | 0.111 | 2.28 | 0.624 | 0.251 |
| HSS1.900×0.145 | 1.9 | 0.145 | 0.135 | 2.72 | 0.749 | 0.293 |
| HSS1.900×0.188 | 1.9 | 0.188 | 0.174 | 3.44 | 0.943 | 0.355 |
| HSS2.375×0.125 | 2.375 | 0.125 | 0.116 | 3.01 | 0.823 | 0.527 |
| HSS2.375×0.154 | 2.375 | 0.154 | 0.143 | 3.66 | 1 | 0.627 |
| HSS2.375×0.188 | 2.375 | 0.188 | 0.174 | 4.4 | 1.2 | 0.733 |
| HSS2.375×0.218 | 2.375 | 0.218 | 0.203 | 5.03 | 1.39 | 0.824 |
| HSS2.375×0.250 | 2.375 | 0.25 | 0.233 | 5.68 | 1.57 | 0.91 |
| HSS2.500×0.125 | 2.5 | 0.125 | 0.116 | 3.17 | 0.869 | 0.619 |
| HSS2.500×0.188 | 2.5 | 0.188 | 0.174 | 4.65 | 1.27 | 0.865 |
| HSS2.500×0.250 | 2.5 | 0.25 | 0.233 | 6.01 | 1.66 | 1.08 |
| HSS2.875×0.125 | 2.875 | 0.125 | 0.116 | 3.67 | 1.01 | 0.958 |
| HSS2.875×0.188 | 2.875 | 0.188 | 0.174 | 5.4 | 1.48 | 1.35 |
| HSS2.875×0.203 | 2.875 | 0.203 | 0.189 | 5.8 | 1.59 | 1.45 |
| HSS2.875×0.250 | 2.875 | 0.25 | 0.233 | 7.02 | 1.93 | 1.7 |
| HSS3.000×0.125 | 3 | 0.125 | 0.116 | 3.84 | 1.05 | 1.09 |
| HSS3.000×0.134 | 3 | 0.134 | 0.124 | 4.11 | 1.12 | 1.16 |
| HSS3.000×0.152 | 3 | 0.152 | 0.141 | 4.63 | 1.27 | 1.3 |
| HSS3.000×0.188 | 3 | 0.188 | 0.174 | 5.65 | 1.54 | 1.55 |
| HSS3.000×0.203 | 3 | 0.203 | 0.189 | 6.07 | 1.67 | 1.66 |
| HSS3.000×0.216 | 3 | 0.216 | 0.201 | 6.43 | 1.77 | 1.74 |
| HSS3.000×0.250 | 3 | 0.25 | 0.233 | 7.35 | 2.03 | 1.95 |
| HSS3.500×0.125 | 3.5 | 0.125 | 0.116 | 4.51 | 1.23 | 1.77 |
| HSS3.500×0.188 | 3.5 | 0.188 | 0.174 | 6.66 | 1.82 | 2.52 |
| HSS3.500×0.203 | 3.5 | 0.203 | 0.189 | 7.15 | 1.97 | 2.7 |
| HSS3.500×0.216 | 3.5 | 0.216 | 0.201 | 7.58 | 2.08 | 2.84 |
| HSS3.500×0.250 | 3.5 | 0.25 | 0.233 | 8.69 | 2.39 | 3.21 |
| HSS3.500×0.300 | 3.5 | 0.3 | 0.279 | 10.26 | 2.82 | 3.69 |
| HSS3.500×0.313 | 3.5 | 0.313 | 0.291 | 10.66 | 2.93 | 3.81 |
| HSS4.000×0.125 | 4 | 0.125 | 0.116 | 5.18 | 1.42 | 2.67 |
| HSS4.000×0.188 | 4 | 0.188 | 0.174 | 7.66 | 2.09 | 3.83 |
| HSS4.000×0.220 | 4 | 0.22 | 0.205 | 8.89 | 2.44 | 4.41 |
| HSS4.000×0.226 | 4 | 0.226 | 0.21 | 9.12 | 2.5 | 4.5 |
| HSS4.000×0.237 | 4 | 0.237 | 0.22 | 9.53 | 2.61 | 4.68 |
| HSS4.000×0.250 | 4 | 0.25 | 0.233 | 10 | 2.76 | 4.91 |
| HSS4.000×0.313 | 4 | 0.313 | 0.291 | 12.34 | 3.39 | 5.87 |
| HSS4.500×0.125 | 4.5 | 0.125 | 0.116 | 5.85 | 1.6 | 3.84 |
| HSS4.500×0.188 | 4.5 | 0.188 | 0.174 | 8.67 | 2.36 | 5.54 |
| HSS4.500×0.237 | 4.5 | 0.237 | 0.22 | 10.8 | 2.96 | 6.79 |
| HSS4.500×0.337 | 4.5 | 0.337 | 0.313 | 15 | 4.12 | 9.07 |
| HSS4.500×0.375 | 4.5 | 0.375 | 0.349 | 16.54 | 4.55 | 9.87 |
| HSS5.000×0.125 | 5 | 0.125 | 0.116 | 6.51 | 1.78 | 5.31 |
| HSS5.000×0.188 | 5 | 0.188 | 0.174 | 9.67 | 2.64 | 7.69 |
| HSS5.000×0.250 | 5 | 0.25 | 0.233 | 12.69 | 3.49 | 9.94 |
| HSS5.000×0.258 | 5 | 0.258 | 0.24 | 13.08 | 3.59 | 10.2 |
| HSS5.000×0.312 | 5 | 0.312 | 0.291 | 15.64 | 4.3 | 12 |
| HSS5.000×0.375 | 5 | 0.375 | 0.349 | 18.54 | 5.1 | 13.9 |
| HSS5.000×0.500 | 5 | 0.5 | 0.465 | 24.05 | 6.62 | 17.2 |
| HSS5.500×0.258 | 5.5 | 0.258 | 0.24 | 14.46 | 3.97 | 13.7 |
| HSS5.500×0.375 | 5.5 | 0.375 | 0.349 | 20.55 | 5.65 | 18.8 |
| HSS5.500×0.500 | 5.5 | 0.5 | 0.465 | 26.73 | 7.36 | 23.5 |
| HSS5.563×0.134 | 5.563 | 0.134 | 0.124 | 7.78 | 2.12 | 7.84 |
| HSS5.563×0.188 | 5.563 | 0.188 | 0.174 | 10.8 | 2.95 | 10.7 |
| HSS5.563×0.258 | 5.563 | 0.258 | 0.24 | 14.63 | 4.01 | 14.2 |
| HSS5.563×0.375 | 5.563 | 0.375 | 0.349 | 20.8 | 5.72 | 19.5 |
| HSS5.563×0.500 | 5.563 | 0.5 | 0.465 | 27.06 | 7.45 | 24.4 |
| HSS6.000×0.125 | 6 | 0.125 | 0.116 | 7.85 | 2.14 | 9.28 |
| HSS6.000×0.188 | 6 | 0.188 | 0.174 | 11.68 | 3.18 | 13.5 |
| HSS6.000×0.250 | 6 | 0.25 | 0.233 | 15.37 | 4.22 | 17.6 |
| HSS6.000×0.280 | 6 | 0.28 | 0.26 | 17.12 | 4.69 | 19.3 |
| HSS6.000×0.312 | 6 | 0.312 | 0.291 | 18.97 | 5.22 | 21.3 |
| HSS6.000×0.375 | 6 | 0.375 | 0.349 | 22.55 | 6.2 | 24.8 |
| HSS6.000×0.500 | 6 | 0.5 | 0.465 | 29.4 | 8.09 | 31.2 |
| HSS6.625×0.125 | 6.625 | 0.125 | 0.116 | 8.69 | 2.37 | 12.6 |
| HSS6.625×0.188 | 6.625 | 0.188 | 0.174 | 12.94 | 3.53 | 18.4 |
| HSS6.625×0.250 | 6.625 | 0.25 | 0.233 | 17.04 | 4.68 | 23.9 |
| HSS6.625×0.280 | 6.625 | 0.28 | 0.26 | 18.99 | 5.2 | 26.4 |
| HSS6.625×0.312 | 6.625 | 0.312 | 0.291 | 21.06 | 5.79 | 29.1 |
| HSS6.625×0.375 | 6.625 | 0.375 | 0.349 | 25.06 | 6.88 | 34 |
| HSS6.625×0.432 | 6.625 | 0.432 | 0.402 | 28.6 | 7.86 | 38.2 |
| HSS6.625×0.500 | 6.625 | 0.5 | 0.465 | 32.74 | 9 | 42.9 |
Round Steel Tube Sizes: Over 6.625 in OD
Units
| Size | Outside diameter (in) | Nominal wall (in) | Design wall (in) | Weight (lb/ft) | Area (in²) | I (in⁴) |
|---|---|---|---|---|---|---|
| HSS6.875×0.188 | 6.875 | 0.188 | 0.174 | 13.44 | 3.66 | 20.6 |
| HSS6.875×0.250 | 6.875 | 0.25 | 0.233 | 17.71 | 4.86 | 26.8 |
| HSS6.875×0.312 | 6.875 | 0.312 | 0.291 | 21.89 | 6.02 | 32.7 |
| HSS6.875×0.375 | 6.875 | 0.375 | 0.349 | 26.06 | 7.16 | 38.2 |
| HSS7.000×0.125 | 7 | 0.125 | 0.116 | 9.19 | 2.51 | 14.9 |
| HSS7.000×0.188 | 7 | 0.188 | 0.174 | 13.69 | 3.73 | 21.7 |
| HSS7.000×0.250 | 7 | 0.25 | 0.233 | 18.04 | 4.95 | 28.4 |
| HSS7.000×0.312 | 7 | 0.312 | 0.291 | 22.31 | 6.13 | 34.6 |
| HSS7.000×0.375 | 7 | 0.375 | 0.349 | 26.56 | 7.29 | 40.4 |
| HSS7.000×0.500 | 7 | 0.5 | 0.465 | 34.74 | 9.55 | 51.2 |
| HSS7.500×0.188 | 7.5 | 0.188 | 0.174 | 14.7 | 4 | 26.9 |
| HSS7.500×0.250 | 7.5 | 0.25 | 0.233 | 19.38 | 5.32 | 35.2 |
| HSS7.500×0.312 | 7.5 | 0.312 | 0.291 | 23.97 | 6.59 | 42.9 |
| HSS7.500×0.375 | 7.5 | 0.375 | 0.349 | 28.56 | 7.84 | 50.2 |
| HSS7.500×0.500 | 7.5 | 0.5 | 0.465 | 37.42 | 10.3 | 63.9 |
| HSS8.625×0.188 | 8.625 | 0.188 | 0.174 | 16.96 | 4.62 | 41.3 |
| HSS8.625×0.250 | 8.625 | 0.25 | 0.233 | 22.38 | 6.14 | 54.1 |
| HSS8.625×0.322 | 8.625 | 0.322 | 0.3 | 28.58 | 7.85 | 68.1 |
| HSS8.625×0.375 | 8.625 | 0.375 | 0.349 | 33.07 | 9.07 | 77.8 |
| HSS8.625×0.500 | 8.625 | 0.5 | 0.465 | 43.43 | 11.9 | 100 |
| HSS8.625×0.625 | 8.625 | 0.625 | 0.581 | 53.45 | 14.7 | 119 |
| HSS9.625×0.188 | 9.625 | 0.188 | 0.174 | 18.97 | 5.17 | 57.7 |
| HSS9.625×0.250 | 9.625 | 0.25 | 0.233 | 25.06 | 6.87 | 75.9 |
| HSS9.625×0.312 | 9.625 | 0.312 | 0.291 | 31.06 | 8.53 | 93 |
| HSS9.625×0.375 | 9.625 | 0.375 | 0.349 | 37.08 | 10.2 | 110 |
| HSS9.625×0.500 | 9.625 | 0.5 | 0.465 | 48.77 | 13.4 | 141 |
| HSS9.625×0.625 | 9.625 | 0.625 | 0.581 | 60.13 | 16.5 | 170 |
| HSS10.000×0.188 | 10 | 0.188 | 0.174 | 19.72 | 5.37 | 64.8 |
| HSS10.000×0.250 | 10 | 0.25 | 0.233 | 26.06 | 7.15 | 85.3 |
| HSS10.000×0.312 | 10 | 0.312 | 0.291 | 32.31 | 8.88 | 105 |
| HSS10.000×0.375 | 10 | 0.375 | 0.349 | 38.58 | 10.6 | 123 |
| HSS10.000×0.500 | 10 | 0.5 | 0.465 | 50.78 | 13.9 | 159 |
| HSS10.000×0.625 | 10 | 0.625 | 0.581 | 62.64 | 17.2 | 191 |
| HSS10.750×0.188 | 10.75 | 0.188 | 0.174 | 21.17 | 5.79 | 81 |
| HSS10.750×0.250 | 10.75 | 0.25 | 0.233 | 28.06 | 7.7 | 106 |
| HSS10.750×0.313 | 10.75 | 0.313 | 0.291 | 34.87 | 9.55 | 131 |
| HSS10.750×0.375 | 10.75 | 0.375 | 0.349 | 41.59 | 11.4 | 154 |
| HSS10.750×0.500 | 10.75 | 0.5 | 0.465 | 54.79 | 15 | 199 |
| HSS10.750×0.625 | 10.75 | 0.625 | 0.581 | 67.65 | 18.6 | 241 |
| HSS11.750×0.250 | 11.75 | 0.25 | 0.233 | 30.73 | 8.41 | 140 |
| HSS11.750×0.337 | 11.75 | 0.337 | 0.313 | 41.12 | 11.3 | 184 |
| HSS11.750×0.375 | 11.75 | 0.375 | 0.349 | 45.6 | 12.5 | 203 |
| HSS11.750×0.500 | 11.75 | 0.5 | 0.465 | 60.13 | 16.5 | 263 |
| HSS11.750×0.625 | 11.75 | 0.625 | 0.581 | 74.33 | 20.4 | 319 |
| HSS12.000×0.250 | 12 | 0.25 | 0.233 | 31.4 | 8.6 | 149 |
| HSS12.000×0.375 | 12 | 0.375 | 0.349 | 46.6 | 12.8 | 217 |
| HSS12.000×0.500 | 12 | 0.5 | 0.465 | 61.47 | 16.9 | 281 |
| HSS12.000×0.625 | 12 | 0.625 | 0.581 | 76 | 20.9 | 341 |
| HSS12.750×0.188 | 12.75 | 0.188 | 0.174 | 25.18 | 6.89 | 136 |
| HSS12.750×0.250 | 12.75 | 0.25 | 0.233 | 33.41 | 9.16 | 180 |
| HSS12.750×0.375 | 12.75 | 0.375 | 0.349 | 49.61 | 13.6 | 262 |
| HSS12.750×0.500 | 12.75 | 0.5 | 0.465 | 65.48 | 17.9 | 339 |
| HSS12.750×0.625 | 12.75 | 0.625 | 0.581 | 81.01 | 22.2 | 412 |
| HSS12.750×0.750 | 12.75 | 0.75 | 0.698 | 96.21 | 26.4 | 481 |
| HSS13.375×0.188 | 13.375 | 0.188 | 0.174 | 26.43 | 7.23 | 158 |
| HSS13.375×0.250 | 13.375 | 0.25 | 0.233 | 35.08 | 9.6 | 207 |
| HSS13.375×0.313 | 13.375 | 0.313 | 0.291 | 43.64 | 11.9 | 256 |
| HSS13.375×0.375 | 13.375 | 0.375 | 0.349 | 52.11 | 14.3 | 303 |
| HSS13.375×0.500 | 13.375 | 0.5 | 0.465 | 68.82 | 18.9 | 393 |
| HSS13.375×0.625 | 13.375 | 0.625 | 0.581 | 85.19 | 23.4 | 479 |
| HSS14.000×0.188 | 14 | 0.188 | 0.174 | 27.69 | 7.57 | 181 |
| HSS14.000×0.250 | 14 | 0.25 | 0.233 | 36.75 | 10.1 | 239 |
| HSS14.000×0.312 | 14 | 0.312 | 0.291 | 45.65 | 12.5 | 295 |
| HSS14.000×0.375 | 14 | 0.375 | 0.349 | 54.62 | 15 | 349 |
| HSS14.000×0.500 | 14 | 0.5 | 0.465 | 72.16 | 19.8 | 453 |
| HSS14.000×0.625 | 14 | 0.625 | 0.581 | 89.36 | 24.5 | 552 |
| HSS14.000×0.750 | 14 | 0.75 | 0.698 | 106.23 | 29.1 | 647 |
| HSS14.000×0.875 | 14 | 0.875 | 0.814 | 122.77 | 33.7 | 735 |
| HSS14.000×1.000 | 14 | 1 | 0.93 | 138.97 | 38.2 | 820 |
| HSS16.000×0.250 | 16 | 0.25 | 0.233 | 42.09 | 11.5 | 359 |
| HSS16.000×0.312 | 16 | 0.312 | 0.291 | 52.32 | 14.4 | 443 |
| HSS16.000×0.375 | 16 | 0.375 | 0.349 | 62.64 | 17.2 | 526 |
| HSS16.000×0.438 | 16 | 0.438 | 0.407 | 72.87 | 19.9 | 606 |
| HSS16.000×0.500 | 16 | 0.5 | 0.465 | 82.85 | 22.7 | 685 |
| HSS16.000×0.625 | 16 | 0.625 | 0.581 | 103 | 28.1 | 838 |
| HSS16.000×0.750 | 16 | 0.75 | 0.698 | 122.27 | 33.5 | 984 |
| HSS16.000×0.875 | 16 | 0.875 | 0.814 | 141.48 | 38.8 | 1,120 |
| HSS16.000×1.000 | 16 | 1 | 0.93 | 160.35 | 44 | 1,250 |
| HSS18.000×0.250 | 18 | 0.25 | 0.233 | 47.44 | 13 | 512 |
| HSS18.000×0.313 | 18 | 0.313 | 0.291 | 59.09 | 16.2 | 634 |
| HSS18.000×0.375 | 18 | 0.375 | 0.349 | 70.66 | 19.4 | 754 |
| HSS18.000×0.500 | 18 | 0.5 | 0.465 | 93.54 | 25.6 | 985 |
| HSS18.000×0.625 | 18 | 0.625 | 0.581 | 116.09 | 31.8 | 1,210 |
| HSS18.000×0.750 | 18 | 0.75 | 0.698 | 138.3 | 37.9 | 1,420 |
| HSS18.000×0.875 | 18 | 0.875 | 0.814 | 160.19 | 43.9 | 1,630 |
| HSS18.000×1.000 | 18 | 1 | 0.93 | 181.73 | 49.9 | 1,820 |
| HSS20.000×0.250 | 20 | 0.25 | 0.233 | 52.78 | 14.4 | 705 |
| HSS20.000×0.313 | 20 | 0.313 | 0.291 | 65.77 | 18 | 874 |
| HSS20.000×0.375 | 20 | 0.375 | 0.349 | 78.67 | 21.5 | 1,040 |
| HSS20.000×0.500 | 20 | 0.5 | 0.465 | 104 | 28.5 | 1,360 |
| HSS20.000×0.625 | 20 | 0.625 | 0.581 | 129.45 | 35.5 | 1,670 |
| HSS20.000×0.750 | 20 | 0.75 | 0.698 | 154.34 | 42.3 | 1,970 |
| HSS20.000×0.875 | 20 | 0.875 | 0.814 | 178.89 | 49 | 2,260 |
| HSS20.000×1.000 | 20 | 1 | 0.93 | 203.11 | 55.7 | 2,540 |
| HSS22.000×0.313 | 22 | 0.313 | 0.291 | 72.45 | 19.8 | 1,170 |
| HSS22.000×0.375 | 22 | 0.375 | 0.349 | 86.69 | 23.7 | 1,390 |
| HSS22.000×0.500 | 22 | 0.5 | 0.465 | 114.92 | 31.5 | 1,820 |
| HSS22.000×0.625 | 22 | 0.625 | 0.581 | 142.81 | 39.1 | 2,240 |
| HSS22.000×0.750 | 22 | 0.75 | 0.698 | 170.37 | 46.7 | 2,650 |
| HSS24.000×0.313 | 24 | 0.313 | 0.291 | 79.13 | 21.6 | 1,520 |
| HSS24.000×0.375 | 24 | 0.375 | 0.349 | 94.71 | 25.9 | 1,810 |
| HSS24.000×0.500 | 24 | 0.5 | 0.465 | 125.61 | 34.4 | 2,380 |
| HSS24.000×0.625 | 24 | 0.625 | 0.581 | 156.18 | 42.8 | 2,930 |
| HSS24.000×0.750 | 24 | 0.75 | 0.698 | 186.41 | 51.1 | 3,470 |
| HSS24.000×0.875 | 24 | 0.875 | 0.814 | 216.31 | 59.3 | 3,990 |
| HSS24.000×1.000 | 24 | 1 | 0.93 | 245.87 | 67.4 | 4,490 |
| HSS26.000×0.313 | 26 | 0.313 | 0.291 | 85.81 | 23.5 | 1,940 |
| HSS26.000×0.375 | 26 | 0.375 | 0.349 | 102.73 | 28.1 | 2,310 |
| HSS26.000×0.500 | 26 | 0.5 | 0.465 | 136.3 | 37.3 | 3,040 |
| HSS26.000×0.625 | 26 | 0.625 | 0.581 | 169.54 | 46.4 | 3,750 |
| HSS26.000×0.750 | 26 | 0.75 | 0.698 | 202.44 | 55.4 | 4,440 |
| HSS28.000×0.375 | 28 | 0.375 | 0.349 | 110.74 | 30.3 | 2,900 |
| HSS28.000×0.500 | 28 | 0.5 | 0.465 | 146.99 | 40.2 | 3,810 |
| HSS28.000×0.625 | 28 | 0.625 | 0.581 | 182.9 | 50.1 | 4,710 |
| HSS28.000×0.750 | 28 | 0.75 | 0.698 | 218.48 | 59.8 | 5,580 |
| HSS28.000×0.875 | 28 | 0.875 | 0.814 | 253.72 | 69.5 | 6,430 |
| HSS28.000×1.000 | 28 | 1 | 0.93 | 288.63 | 79.1 | 7,250 |
Steel Pipe Sizes (STD, XS and XXS)
AISC also lists ASTM A53 structural pipe in standard weight (STD), extra strong (XS) and double extra strong (XXS):
Units
| Pipe | Outside diameter (in) | Inside diameter (in) | Nominal wall (in) | Weight (lb/ft) | Area (in²) | I (in⁴) |
|---|---|---|---|---|---|---|
| Pipe 1/2 STD | 0.84 | 0.622 | 0.109 | 0.85 | 0.234 | 0.016 |
| Pipe 1/2 XS | 0.84 | 0.546 | 0.147 | 1.09 | 0.303 | 0.019 |
| Pipe 3/4 STD | 1.05 | 0.824 | 0.113 | 1.13 | 0.312 | 0.035 |
| Pipe 3/4 XS | 1.05 | 0.742 | 0.154 | 1.48 | 0.407 | 0.043 |
| Pipe 1 STD | 1.315 | 1.049 | 0.133 | 1.68 | 0.469 | 0.083 |
| Pipe 1 XS | 1.315 | 0.957 | 0.179 | 2.17 | 0.602 | 0.101 |
| Pipe 1-1/4 STD | 1.66 | 1.38 | 0.14 | 2.27 | 0.625 | 0.184 |
| Pipe 1-1/4 XS | 1.66 | 1.278 | 0.191 | 3 | 0.837 | 0.231 |
| Pipe 1-1/2 STD | 1.9 | 1.61 | 0.145 | 2.72 | 0.749 | 0.293 |
| Pipe 1-1/2 XS | 1.9 | 1.5 | 0.2 | 3.63 | 1 | 0.372 |
| Pipe 2 STD | 2.375 | 2.067 | 0.154 | 3.66 | 1.02 | 0.627 |
| Pipe 2 XS | 2.375 | 1.939 | 0.218 | 5.03 | 1.4 | 0.827 |
| Pipe 2 XXS | 2.375 | 1.503 | 0.436 | 9.04 | 2.51 | 1.27 |
| Pipe 2-1/2 STD | 2.875 | 2.469 | 0.203 | 5.8 | 1.61 | 1.45 |
| Pipe 2-1/2 XS | 2.875 | 2.323 | 0.276 | 7.67 | 2.1 | 1.83 |
| Pipe 2-1/2 XXS | 2.875 | 1.771 | 0.552 | 13.7 | 3.83 | 2.78 |
| Pipe 3 STD | 3.5 | 3.068 | 0.216 | 7.58 | 2.07 | 2.85 |
| Pipe 3 XS | 3.5 | 2.9 | 0.3 | 10.3 | 2.83 | 3.7 |
| Pipe 3 XXS | 3.5 | 2.3 | 0.6 | 18.6 | 5.17 | 5.79 |
| Pipe 3-1/2 STD | 4 | 3.548 | 0.226 | 9.12 | 2.5 | 4.52 |
| Pipe 3-1/2 XS | 4 | 3.364 | 0.318 | 12.5 | 3.43 | 5.94 |
| Pipe 4 STD | 4.5 | 4.026 | 0.237 | 10.8 | 2.96 | 6.82 |
| Pipe 4 XS | 4.5 | 3.826 | 0.337 | 15 | 4.14 | 9.12 |
| Pipe 4 XXS | 4.5 | 3.152 | 0.674 | 27.6 | 7.66 | 14.7 |
| Pipe 5 STD | 5.563 | 5.047 | 0.258 | 14.6 | 4.01 | 14.3 |
| Pipe 5 XS | 5.563 | 4.813 | 0.375 | 20.8 | 5.73 | 19.5 |
| Pipe 5 XXS | 5.563 | 4.063 | 0.75 | 38.6 | 10.7 | 32.2 |
| Pipe 6 STD | 6.625 | 6.065 | 0.28 | 19 | 5.2 | 26.5 |
| Pipe 6 XS | 6.625 | 5.761 | 0.432 | 28.6 | 7.83 | 38.3 |
| Pipe 6 XXS | 6.625 | 4.897 | 0.864 | 53.2 | 14.7 | 63.5 |
| Pipe 8 STD | 8.625 | 7.981 | 0.322 | 28.6 | 7.85 | 68.1 |
| Pipe 8 XS | 8.625 | 7.625 | 0.5 | 43.4 | 11.9 | 100 |
| Pipe 8 XXS | 8.625 | 6.875 | 0.875 | 72.5 | 20 | 154 |
| Pipe 10 STD | 10.75 | 10.02 | 0.365 | 40.5 | 11.5 | 151 |
| Pipe 10 XS | 10.75 | 9.75 | 0.5 | 54.8 | 15.1 | 199 |
| Pipe 10 XXS | 10.75 | 8.75 | 1 | 104 | 28.8 | 354 |
| Pipe 12 STD | 12.75 | 12 | 0.375 | 49.6 | 13.7 | 262 |
| Pipe 12 XS | 12.75 | 11.75 | 0.5 | 65.5 | 17.5 | 339 |
| Pipe 12 XXS | 12.75 | 10.75 | 1 | 126 | 35.4 | 625 |
| Pipe 14 STD | 14 | 13.25 | 0.375 | 54.6 | 15 | 350 |
| Pipe 14 XS | 14 | 13 | 0.5 | 72.2 | 19.2 | 440 |
| Pipe 16 STD | 16 | 15.25 | 0.375 | 62.6 | 17.2 | 527 |
| Pipe 16 XS | 16 | 15 | 0.5 | 82.9 | 22 | 665 |
| Pipe 18 STD | 18 | 17.25 | 0.375 | 70.7 | 19.4 | 756 |
| Pipe 18 XS | 18 | 17 | 0.5 | 93.5 | 24.8 | 956 |
| Pipe 20 STD | 20 | 19.25 | 0.375 | 78.7 | 21.6 | 1,040 |
| Pipe 20 XS | 20 | 19 | 0.5 | 104 | 27.6 | 1,320 |
| Pipe 24 STD | 24 | 23.25 | 0.375 | 94.7 | 26 | 1,820 |
| Pipe 24 XS | 24 | 23 | 0.5 | 126 | 33.3 | 2,310 |
| Pipe 26 STD | 26 | 25.25 | 0.375 | 103 | 28.2 | 2,320 |
| Pipe 26 XS | 26 | 25 | 0.5 | 136 | 36.1 | 2,950 |
Square and rectangular sizes are in the HSS and square tube sizes chart. Stainless tube is listed separately in the stainless steel tube sizes chart. For the weight of any round tube, including mild steel mechanical tube, use the steel tubing weight calculator.
Round Steel Tube FAQ
What is the difference between round HSS and pipe?
Both are round steel tube. Round HSS is made to a structural tube standard such as ASTM A500 and named by its outside diameter and wall. Pipe is made to ASTM A53 and named by nominal pipe size and schedule or weight class.
How do I work out the weight of round steel tube?
Weight in lb/ft = 10.69 × (OD − t) × t, with the outside diameter and wall in inches. For example, a 2 in OD tube with a 0.125 in wall weighs 10.69 × 1.875 × 0.125 = 2.51 lb/ft.
What is mild steel tube?
Mild steel is low-carbon steel. Mild steel mechanical tube is sold in many sizes not listed here; its weight follows the same formula.
Source: AISC Shapes Database v16.0, consistent with the AISC Steel Construction Manual, 16th Edition. Last updated: September 2026. Reference information only, not engineering advice. Disclaimer.