Ever wondered how pipes can withstand bending without breaking? Understanding the bending strength of pipes is crucial for various engineering applications. This article delves into the factors that determine a pipe’s bending strength, offering detailed charts and insights for both aluminum and steel pipes. By the end, you’ll grasp the essential parameters that influence pipe performance under stress, ensuring your designs are both efficient and reliable. Ready to enhance your engineering knowledge? Read on to explore the intricacies of pipe bending strength and its practical implications.
Bending strength refers to the maximum stress that a material can withstand when it ruptures or reaches a specified bending moment under a bending load. This stress is the maximum normal stress during bending and is measured in MPa (megapascals). It reflects the material’s ability to resist bending and is used to measure its bending performance.
| Spec. [mm] | D | d | Thickness [mm] | Cross-sectional area [mm2] | Weight St [Kg/M] | Weight Al [Kg/M] | Iz | I*E (Steel) | I*E (Al) |
| 8 | 8 | 6.6 | 0.7 | 16.05 | 0.13 | 0.04 | 107.92 | 22231.50 | 7554.39 |
| 8 | 6.4 | 0.8 | 18.10 | 0.14 | 0.05 | 118.71 | 24453.63 | 8309.49 | |
| 8 | 6.2 | 0.9 | 20.07 | 0.16 | 0.05 | 128.53 | 26476.92 | 8997.01 | |
| 8 | 6 | 1.0 | 21.99 | 0.17 | 0.06 | 137.44 | 28313.60 | 9621.13 | |
| 10 | 10 | 8.6 | 0.7 | 20.45 | 0.16 | 0.06 | 222.36 | 45806.54 | 15565.33 |
| 10 | 8.4 | 0.8 | 23.12 | 0.18 | 0.06 | 246.48 | 50775.25 | 17253.73 | |
| 10 | 8.2 | 0.9 | 25.73 | 0.20 | 0.07 | 268.94 | 55401.45 | 18825.74 | |
| 10 | 8 | 1.0 | 28.27 | 0.22 | 0.08 | 289.81 | 59701.25 | 20286.83 | |
| 12 | 12 | 10.6 | 0.7 | 24.85 | 0.19 | 0.07 | 398.16 | 82020.77 | 27871.14 |
| 12 | 10.4 | 0.8 | 28.15 | 0.22 | 0.08 | 443.62 | 91386.35 | 31053.61 | |
| 12 | 10.2 | 0.9 | 31.38 | 0.24 | 0.08 | 486.54 | 100226.90 | 34057.69 | |
| 12 | 10 | 1.0 | 34.56 | 0.27 | 0.09 | 527.00 | 108562.44 | 36890.15 | |
| 13 | 13 | 11.4 | 0.8 | 30.66 | 0.24 | 0.08 | 572.92 | 118021.19 | 40104.29 |
| 14.5 | 14.5 | 13.1 | 0.7 | 30.35 | 0.24 | 0.08 | 724.29 | 149203.29 | 50700.15 |
| 14.5 | 12.9 | 0.8 | 34.43 | 0.27 | 0.09 | 810.57 | 166977.19 | 56739.82 | |
| 14.5 | 12.7 | 0.9 | 38.45 | 0.30 | 0.10 | 892.93 | 183943.35 | 62505.02 | |
| 14.5 | 12.5 | 1.0 | 42.41 | 0.33 | 0.11 | 971.49 | 200126.62 | 68004.19 | |
| 15 | 15 | 13.6 | 0.7 | 31.45 | 0.25 | 0.08 | 805.76 | 165986.46 | 56403.17 |
| 15 | 13.4 | 0.8 | 35.69 | 0.28 | 0.10 | 902.38 | 185891.00 | 63166.85 | |
| 15 | 13.2 | 0.9 | 39.87 | 0.31 | 0.11 | 994.78 | 204923.98 | 69634.36 | |
| 15 | 13 | 1.0 | 43.98 | 0.34 | 0.12 | 1083.06 | 223111.19 | 75814.48 | |
| 16 | 16 | 14.8 | 0.6 | 29.03 | 0.23 | 0.08 | 861.85 | 177541.24 | 60329.55 |
| 16 | 14.6 | 0.7 | 33.65 | 0.26 | 0.09 | 986.60 | 203239.23 | 69061.88 | |
| 16 | 14.4 | 0.8 | 38.20 | 0.30 | 0.10 | 1106.32 | 227902.57 | 77442.62 | |
| 16 | 14.2 | 0.9 | 42.69 | 0.33 | 0.12 | 1221.16 | 251559.39 | 85481.35 | |
| 16 | 14 | 1.0 | 47.12 | 0.37 | 0.13 | 1331.25 | 274237.47 | 93187.49 | |
| 17.5 | 17.5 | 16.3 | 0.6 | 31.86 | 0.25 | 0.09 | 1138.72 | 234577.05 | 79710.65 |
| 17.5 | 16.1 | 0.7 | 36.95 | 0.29 | 0.10 | 1305.69 | 268971.53 | 91398.09 | |
| 17.5 | 15.9 | 0.8 | 41.97 | 0.33 | 0.11 | 1466.54 | 302107.83 | 102658.00 | |
| 17.5 | 15.7 | 0.9 | 46.94 | 0.37 | 0.13 | 1621.44 | 334017.02 | 113500.93 | |
| 17.5 | 15.5 | 1.0 | 51.84 | 0.40 | 0.14 | 1770.53 | 364729.77 | 123937.30 | |
| 17.5 | 15.1 | 1.2 | 61.45 | 0.48 | 0.17 | 2051.88 | 422686.73 | 143631.41 | |
| 19 | 19 | 17.8 | 0.6 | 34.68 | 0.27 | 0.09 | 1469.35 | 302686.72 | 102854.71 |
| 19 | 17.6 | 0.7 | 40.24 | 0.31 | 0.11 | 1687.12 | 347546.88 | 118098.45 | |
| 19 | 17.4 | 0.8 | 45.74 | 0.36 | 0.12 | 1897.59 | 390903.50 | 132831.29 | |
| 19 | 17.2 | 0.9 | 51.18 | 0.40 | 0.14 | 2100.93 | 432790.56 | 147064.75 | |
| 19 | 17 | 1.0 | 56.55 | 0.44 | 0.15 | 2297.29 | 473241.66 | 160810.27 | |
| 19 | 16.6 | 1.2 | 67.10 | 0.52 | 0.18 | 2669.75 | 549968.35 | 186882.45 | |
| 22 | 22 | 20.8 | 0.6 | 40.34 | 0.31 | 0.11 | 2310.97 | 476059.17 | 161767.68 |
| 22 | 20.6 | 0.7 | 46.84 | 0.37 | 0.13 | 2659.29 | 547813.52 | 186150.23 | |
| 22 | 20.4 | 0.8 | 53.28 | 0.42 | 0.14 | 2997.61 | 617508.10 | 209832.85 | |
| 22 | 20.2 | 0.9 | 59.66 | 0.47 | 0.16 | 3326.13 | 685182.71 | 232829.08 | |
| 22 | 20 | 1.0 | 65.97 | 0.51 | 0.18 | 3645.03 | 750876.76 | 255152.30 | |
| 22 | 19.6 | 1.2 | 78.41 | 0.61 | 0.21 | 4254.75 | 876478.88 | 297832.63 | |
| 25 | 25 | 23.8 | 0.6 | 45.99 | 0.36 | 0.12 | 3424.86 | 705521.67 | 239740.37 |
| 25 | 23.6 | 0.7 | 53.44 | 0.42 | 0.14 | 3947.63 | 813212.78 | 276334.44 | |
| 25 | 23.4 | 0.8 | 60.82 | 0.47 | 0.16 | 4457.28 | 918200.51 | 312009.88 | |
| 25 | 23.2 | 0.9 | 68.14 | 0.53 | 0.18 | 4954.03 | 1020530.49 | 346782.20 | |
| 25 | 23 | 1.0 | 75.40 | 0.59 | 0.20 | 5438.10 | 1120247.94 | 380666.78 | |
| 25 | 22.6 | 1.2 | 89.72 | 0.70 | 0.24 | 6369.05 | 1312024.29 | 445833.50 | |
| 25 | 22 | 1.5 | 110.74 | 0.86 | 0.30 | 7675.75 | 1581203.51 | 537302.16 | |
| 25 | 21 | 2.0 | 144.51 | 1.13 | 0.39 | 9628.20 | 1983408.36 | 673973.71 | |
| 25 | 20 | 2.5 | 176.71 | 1.38 | 0.48 | 11320.78 | 2332080.27 | 792454.46 | |
| 28 | 28 | 26.6 | 0.7 | 60.04 | 0.47 | 0.16 | 5596.69 | 1152918.26 | 391768.34 |
| 28 | 26 | 1.0 | 84.82 | 0.66 | 0.23 | 7740.10 | 1594460.35 | 541806.91 | |
| 32 | 32 | 29 | 1.5 | 143.73 | 1.12 | 0.39 | 16753.28 | 3451175.44 | 1172729.52 |
| Spec. [mm] | h | b | R | Thickness [mm] | Cross-sectional area [mm2] | Weight St [Kg/M] | Weight Al [Kg/M] | Iz | I*E (Steel) | I*E (Al) |
| 16*8 | 16 | 8 | 1.2 | 0.6 | 26.43 | 0.21 | 0.07 | 836.01 | 172217.85 | 58520.63 |
| 16 | 8 | 1.4 | 0.7 | 30.38 | 0.24 | 0.08 | 940.92 | 193830.13 | 65864.61 | |
| 16 | 8 | 1.6 | 0.8 | 34.19 | 0.27 | 0.09 | 1036.68 | 213556.85 | 72567.86 | |
| 16 | 8 | 1.8 | 0.9 | 37.87 | 0.30 | 0.10 | 1123.54 | 231449.31 | 78647.82 | |
| 16 | 8 | 2 | 1.0 | 41.42 | 0.32 | 0.11 | 1201.74 | 247558.24 | 84121.73 | |
| 12*6 | 12 | 6 | 0.8 | 0.4 | 13.35 | 0.10 | 0.04 | 240.74 | 49592.41 | 16851.79 |
| 12 | 6 | 1.2 | 0.6 | 19.23 | 0.15 | 0.05 | 328.01 | 67570.72 | 22960.92 | |
| 12 | 6 | |||||||||
| 20*10 | 20 | 10 | 1.2 | 0.6 | 33.63 | 0.26 | 0.09 | 1703.31 | 350881.46 | 119231.56 |
| 20 | 10 | 1.4 | 0.7 | 38.78 | 0.30 | 0.10 | 1932.19 | 398030.68 | 135253.14 | |
| 20 | 10 | 1.6 | 0.8 | 43.79 | 0.34 | 0.12 | 2146.21 | 442119.96 | 150234.94 | |
| 20 | 10 | 1.8 | 0.9 | 48.67 | 0.38 | 0.13 | 2345.70 | 483214.52 | 164199.11 | |
| 20 | 10 | 2 | 1.0 | 53.42 | 0.42 | 0.14 | 2530.97 | 521379.03 | 177167.63 | |
| 20 | 10 | 2.4 | 1.2 | 62.53 | 0.49 | 0.17 | 2860.07 | 589173.52 | 200204.59 | |
| 22*22 | 22 | 22 | 1.2 | 0.6 | 50.43 | 0.39 | 0.14 | 3813.36 | 785552.24 | 266935.23 |
| 22 | 22 | 1.4 | 0.7 | 58.38 | 0.46 | 0.16 | 4365.55 | 899303.29 | 305588.50 | |
| 22 | 22 | 1.6 | 0.8 | 66.19 | 0.52 | 0.18 | 4894.99 | 1008367.62 | 342649.19 | |
| 22 | 22 | 1.8 | 0.9 | 73.87 | 0.58 | 0.20 | 5402.07 | 1112826.50 | 378144.93 |
| Spec. [mm] | h | b | d | Thickness [mm] | Cross-sectional area [mm2] | Weight St [Kg/M] | Weight Al [Kg/M] | Iz | I*E (Steel) | I*E (Al) |
| 21.5*11 | 21.5 | 11 | 9.8 | 0.6 | 32.20 | 0.25 | 0.09 | 1604.15 | 330455.20 | 112290.60 |
| 21.5 | 11 | 9.6 | 0.7 | 37.35 | 0.29 | 0.10 | 1842.08 | 379467.97 | 128945.43 | |
| 21.5 | 11 | 9.4 | 0.8 | 42.44 | 0.33 | 0.11 | 2072.07 | 426846.07 | 145044.78 | |
| 21.5 | 11 | 9.2 | 0.9 | 47.46 | 0.37 | 0.13 | 2294.30 | 472625.27 | 160600.82 | |
| 21.5 | 11 | 9 | 1.0 | 52.42 | 0.41 | 0.14 | 2508.94 | 516840.92 | 175625.56 |
| Spec. [mm] | a | b | Thickness [mm] | Cross-sectional area [mm2] | Weight St [Kg/M] | Weight Al [Kg/M] | Iz | I*E (Steel) | I*E (Al) |
| 16*8 | 8 | 4 | 0.6 | 21.49 | 0.17 | 0.06 | 526.40 | 108439.22 | 36848.28 |
| 8 | 4 | 0.7 | 24.85 | 0.19 | 0.07 | 600.24 | 123648.56 | 42016.50 | |
| 8 | 4 | 0.8 | 28.15 | 0.22 | 0.08 | 670.42 | 138106.70 | 46929.46 | |
| 8 | 4 | 0.9 | 31.38 | 0.24 | 0.08 | 737.08 | 151837.91 | 51595.41 | |
| 8 | 4 | 1.0 | 34.56 | 0.27 | 0.09 | 800.32 | 164866.07 | 56022.45 |
As the founder of MachineMFG, I have dedicated over a decade of my career to the metalworking industry. My extensive experience has allowed me to become an expert in the fields of sheet metal fabrication, machining, mechanical engineering, and machine tools for metals. I am constantly thinking, reading, and writing about these subjects, constantly striving to stay at the forefront of my field. Let my knowledge and expertise be an asset to your business.
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