Beryllium-Stress relieved (ground and etched) Plate: MIL-HDBK-5J Design Allowables
show US units (ksi, Msi, lb/in³) open the MIL-HDBK-5J tool compare against temperature find alternatives
| Material class | Beryllium |
| Alloy / temper / form | Beryllium / Stress relieved (ground and etched) / Plate |
| Specifications | AMS 7902 |
| Handbook | MIL-HDBK-5J, 31 January 2003, section 7.2.1.0, Table 7.2.1.0(c) (pdf page 5 of the chapter file) |
| Dimension bands | 3 |
| Density | 1855 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 | 0.000–0.601 in (0–15.27 mm) | 0.251–0.450 in (6.375–11.43 mm) | 0.451–0.600 in (11.46–15.24 mm) | |
|---|---|---|---|---|
| Specification | AMS 7902 | AMS 7902 | AMS 7902 | |
| Basis | S | S | S | |
| Ftu, MPa | L | 275.8 | 448.2 | 413.7 |
| LT | 275.8 | 448.2 | 413.7 | |
| Fty, MPa | L | 206.8 | 310.3 | 275.8 |
| LT | 206.8 | 310.3 | 275.8 | |
| e, % | L | 1 | 4 | 3 |
| LT | 1 | 4 | 3 | |
| E, GPa | 293 | 293 | 293 | |
| Ec, GPa | 293 | 293 | 293 | |
| G, GPa | 137.9 | 137.9 | 137.9 | |
| ρ, kg/m³ | 1855 | 1855 | 1855 | |
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
| °C | F_tu | F_ty |
|---|---|---|
| 38 | 98.8 | 98.8 |
| 93 | 93.7 | 93.5 |
| 149 | 88.7 | 88.9 |
| 204 | 83.6 | 84.8 |
| 26 | 78 | 80 |
| 316 | 71.9 | 74.9 |
| 371 | 65.2 | 69.3 |
| 427 | 58.2 | 62.3 |
| 538 | 42.4 | 44.2 |
| 649 | 23 | 22.8 |
Factors in percent of the room-temperature allowable.
Other Beryllium Tables
- Beryllium-Hot pressed (ground and etched) Bar, rod, tubing, and machined shapes (Table 7.2.1.0(b))
- Beryllium-Stress relieved (ground and etched) Sheet (Table 7.2.1.0(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.