2124-T851 Plate: MIL-HDBK-5J Design Allowables
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| Material class | Aluminum |
| Alloy / temper / form | 2124 / T851 / Plate |
| Specifications | AMS 4101 and AMS-QQ-A-250/29 |
| Handbook | MIL-HDBK-5J, 31 January 2003, section 3.2.7.0, Table 3.2.7.0(b) (pdf page 158 of the chapter file) |
| Dimension bands | 6 |
| Density | 2768 kg/m³ |
Design Mechanical and Physical Properties (room temperature)
Converted from the handbook table (ksi, Msi, lb/in³) and rounded to 4 significant figures; dimension bands in inches with mm in parentheses. Bases: A and B are statistical minimums (99 % and 90 % probability at 95 % confidence), S the specification minimum. Grain directions: L longitudinal, LT long transverse, ST short transverse.
| Dimension band | 1.000–1.500 in (25.4–38.1 mm) | 1.501–2.000 in (38.13–50.8 mm) | 2.001–3.000 in (50.83–76.2 mm) | 3.001–4.000 in (76.23–101.6 mm) | 4.001–5.000 in (101.6–127 mm) | 5.001–6.000 in (127–152.4 mm) | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Specification | AMS 4101 and AMS-QQ-A-250/29 | AMS 4101 and AMS-QQ-A-250/29 | AMS 4101 and AMS-QQ-A-250/29 | AMS 4101 and AMS-QQ-A-250/29 | AMS 4101 and AMS-QQ-A-250/29 | AMS 4101 and AMS-QQ-A-250/29 | ||||||
| Basis | S | A | B | A | B | A | B | A | B | A | B | |
| Ftu, MPa | L | 455.1 | 455.1 | 468.8 | 448.2 | 468.8 | 448.2 | 461.9 | 441.3 | 455.1 | 434.4 | 448.2 |
| LT | 455.1 | 455.1 | 468.8 | 448.2 | 468.8 | 448.2 | 461.9 | 441.3 | 455.1 | 434.4 | 448.2 | |
| ST | 441.3 | 441.3 | 455.1 | 434.4 | 441.3 | 427.5 | 434.4 | 420.6 | 427.5 | 399.9 | 406.8 | |
| Fty, MPa | L | 393 | 393 | 420.6 | 393 | 420.6 | 386.1 | 413.7 | 379.2 | 399.9 | 372.3 | 386.1 |
| LT | 393 | 393 | 420.6 | 393 | 420.6 | 386.1 | 413.7 | 379.2 | 399.9 | 372.3 | 386.1 | |
| ST | 379.2 | 379.2 | 406.8 | 379.2 | 406.8 | 372.3 | 393 | 365.4 | 379.2 | 351.6 | 365.4 | |
| Fcy, MPa | L | 393 | 393 | 420.6 | 386.1 | 413.7 | 379.2 | 406.8 | 365.4 | 386.1 | 358.5 | 372.3 |
| LT | 393 | 393 | 420.6 | 393 | 420.6 | 386.1 | 413.7 | 379.2 | 399.9 | 372.3 | 386.1 | |
| ST | … | 393 | 420.6 | 399.9 | 427.5 | 393 | 420.6 | 393 | 413.7 | 386.1 | 399.9 | |
| Fbru (e/D = 1.5), MPa | L | … | 668.8 | 689.5 | 661.9 | 689.5 | 661.9 | 682.6 | 648.1 | 668.8 | 641.2 | 661.9 |
| LT | … | 668.8 | 689.5 | 661.9 | 689.5 | 661.9 | 682.6 | 648.1 | 668.8 | 641.2 | 661.9 | |
| ST | … | 668.8 | 689.5 | 661.9 | 689.5 | 661.9 | 682.6 | 648.1 | 668.8 | 641.2 | 661.9 | |
| Fbru (e/D = 2.0), MPa | L | … | 868.7 | 896.3 | 861.8 | 896.3 | 861.8 | 882.5 | 848.1 | 868.7 | 834.3 | 861.8 |
| LT | … | 868.7 | 896.3 | 861.8 | 896.3 | 861.8 | 882.5 | 848.1 | 868.7 | 834.3 | 861.8 | |
| ST | … | 868.7 | 896.3 | 861.8 | 896.3 | 861.8 | 882.5 | 848.1 | 868.7 | 834.3 | 861.8 | |
| Fbry (e/D = 1.5), MPa | L | … | 544.7 | 579.2 | 551.6 | 586.1 | 551.6 | 586.1 | 544.7 | 579.2 | 544.7 | 565.4 |
| LT | … | 544.7 | 579.2 | 551.6 | 586.1 | 551.6 | 586.1 | 544.7 | 579.2 | 544.7 | 565.4 | |
| ST | … | 544.7 | 579.2 | 551.6 | 586.1 | 551.6 | 586.1 | 544.7 | 579.2 | 544.7 | 565.4 | |
| Fbry (e/D = 2.0), MPa | L | … | 627.4 | 675.7 | 634.3 | 682.6 | 634.3 | 682.6 | 634.3 | 668.8 | 627.4 | 655 |
| LT | … | 627.4 | 675.7 | 634.3 | 682.6 | 634.3 | 682.6 | 634.3 | 668.8 | 627.4 | 655 | |
| ST | … | 627.4 | 675.7 | 634.3 | 682.6 | 634.3 | 682.6 | 634.3 | 668.8 | 627.4 | 655 | |
| e, % | L | 6 | 6 | 6 | 6 | 6 | 5 | 5 | 5 | 5 | 5 | 5 |
| LT | 5 | 5 | 5 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | |
| ST | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | |
| E, GPa | 71.71 | 71.71 | 71.71 | 71.71 | 71.71 | 71.71 | 71.71 | 71.71 | 71.71 | 71.71 | 71.71 | |
| Ec, GPa | 75.15 | 75.15 | 75.15 | 75.15 | 75.15 | 75.15 | 75.15 | 75.15 | 75.15 | 75.15 | 75.15 | |
| G, GPa | 27.58 | 27.58 | 27.58 | 27.58 | 27.58 | 27.58 | 27.58 | 27.58 | 27.58 | 27.58 | 27.58 | |
| ν | 0.33 | 0.33 | 0.33 | 0.33 | 0.33 | 0.33 | 0.33 | 0.33 | 0.33 | 0.33 | 0.33 | |
| ρ, kg/m³ | 2768 | 2768 | 2768 | 2768 | 2768 | 2768 | 2768 | 2768 | 2768 | 2768 | 2768 | |
Effect of Temperature
Percent of the room-temperature value against temperature, digitized from the handbook figures (the shortest exposure of each figure, every 10 °F). Strength curves give the allowable at temperature; "after exposure" curves give the room-temperature property after a soak at that temperature.
Strength allowables at temperature, percent of room temperature
| °C | F_tu | F_ty |
|---|---|---|
| 38 | 98.8 | 98.3 |
| 93 | 92.1 | 92.2 |
| 149 | 82.9 | 84.3 |
| 204 | 70.8 |
Factors in percent of the room-temperature allowable.
Source and Use
U.S. Department of Defense (2003). Metallic Materials and Elements for Aerospace Vehicle Structures. MIL-HDBK-5J, 31 January 2003 (public domain). The values are the handbook's design allowables as extracted from the chapter tables; check the printed table before use in a certified analysis, and note that MIL-HDBK-5J was superseded by MMPDS, whose later editions may differ. No warranty is given.