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, also known as flexural strength, refers to the maximum stress that a material can withstand before failure when subjected to a bending load. It is a critical property in metal fabrication and manufacturing, particularly in applications where components are expected to resist deformation under load. This mechanical characteristic is expressed as the maximum normal stress at the moment of rupture or at a specified bending moment, typically measured in MPa (megapascals) or psi (pounds per square inch).
In practical terms, bending strength reflects a material’s ability to resist plastic deformation and fracture when loaded as a beam or plate. It is a composite property that combines tensile, compressive, and shear stresses, making it an essential parameter for designing structural elements, sheet metal components, and load-bearing parts in various industries, including automotive, aerospace, and construction.
The bending strength of a material is influenced by several factors:
Engineers and manufacturers utilize bending strength data to:
Testing methods such as the three-point and four-point bending tests are commonly employed to measure bending strength, providing valuable insights into a material’s flexural performance and helping to ensure the reliability and safety of engineered products.
| 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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