280 Maraging-Maraged at 900 F Plate: MIL-HDBK-5J Design Allowables
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| Material class | Steel |
| Alloy / temper / form | 280 Maraging / Maraged at 900 F / Plate |
| Specifications | AMS 6521 |
| Handbook | MIL-HDBK-5J, 31 January 2003, section 2.5.1.0, Table 2.5.1.0(c) (pdf page 95 of the chapter file) |
| Dimension bands | 2 |
| Density | 0.286 lb/in3 |
Design Mechanical and Physical Properties (room temperature)
As printed in the handbook table. 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 | 0.188–0.250 in | 0.250– in | |
|---|---|---|---|
| Specification | AMS 6521 | AMS 6521 | |
| Basis | S | S | |
| Ftu, ksi | L | 276 | … |
| LT | 280 | 280 | |
| Fty, ksi | L | 267 | … |
| LT | 270 | 270 | |
| Fcy, ksi | L | … | … |
| LT | 281 | … | |
| Fsu, ksi | L | 170 | … |
| LT | 170 | … | |
| Fbru (e/D = 1.5), ksi | L | 386 | … |
| LT | 386 | … | |
| Fbru (e/D = 2.0), ksi | L | 492 | … |
| LT | 492 | … | |
| Fbry (e/D = 1.5), ksi | L | 357 | … |
| LT | 357 | … | |
| Fbry (e/D = 2.0), ksi | L | 390 | … |
| LT | 390 | … | |
| e, % | L | … | … |
| LT | 4 | 4 | |
| ν | 0.31 | … | |
| ρ, lb/in3 | 0.286 | … | |
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
Moduli at temperature
| °F | F_tu | F_ty | F_cy | F_su | F_bru | F_bry |
|---|---|---|---|---|---|---|
| -300 | 118.6 | 118 | ||||
| -200 | 112.7 | 109.6 | ||||
| -100 | 107.7 | 105.3 | ||||
| 0 | 103 | 101.8 | ||||
| 100 | 98.8 | 99.3 | 98.4 | 99.2 | 99.8 | 99.1 |
| 200 | 94 | 95.8 | 92.5 | 94.9 | 97.2 | 95 |
| 300 | 90.4 | 92.6 | 88.4 | 90.8 | 94.9 | 92 |
| 400 | 87.6 | 89.3 | 85.4 | 86.4 | 92.4 | 88.9 |
| 500 | 86.4 | 86.3 | 83.2 | 82.2 | 89.6 | 86.2 |
| 600 | 85.4 | 83.3 | 81.7 | 78.4 | 86.8 | 83.5 |
| 700 | 83.4 | 79.9 | 79.4 | 76.5 | 83 | 79.6 |
| 800 | 78.9 | 77.1 | 75.8 | 76.1 | 77.4 | 74.2 |
| 1000 | 61.1 | 53.2 |
Factors in percent of the room-temperature allowable.
Other 280 Maraging Tables
- 280 Maraging-Maraged at 900 F Bar (Table 2.5.1.0(c))
- 280 Maraging-Maraged at 900 F Sheet (Table 2.5.1.0(c))
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.