2618-T61 Hand forging: 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 | Aluminum |
| Alloy / temper / form | 2618 / T61 / Hand forging |
| Specifications | AMS 4132, AMS-A-22771, and AMS-QQ-A-367 |
| Handbook | MIL-HDBK-5J, 31 January 2003, section 3.2.13.0, Table 3.2.13.0(c) (pdf page 211 of the chapter file) |
| Dimension bands | 3 |
| 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 | 0–2 in (0–50.8 mm), area 0–144 in2 (0–92900 mm²) | 2–3 in (50.8–76.2 mm), area 0–144 in2 (0–92900 mm²) | 3.001–4.000 in (76.23–101.6 mm), area 0–144 in2 (0–92900 mm²) | |
|---|---|---|---|---|
| Specification | AMS 4132, AMS-A-22771, and AMS-QQ-A-367 | AMS 4132, AMS-A-22771, and AMS-QQ-A-367 | AMS 4132, AMS-A-22771, and AMS-QQ-A-367 | |
| Basis | S | S | S | |
| Ftu, MPa | L | 399.9 | 393 | 386.1 |
| LT | 379.2 | 379.2 | 365.4 | |
| ST | … | 358.5 | 351.6 | |
| Fty, MPa | L | 324.1 | 317.2 | 310.3 |
| LT | 289.6 | 289.6 | 275.8 | |
| ST | … | 289.6 | 268.9 | |
| Fcy, MPa | L | … | … | 303.4 |
| LT | … | … | 289.6 | |
| ST | … | … | 275.8 | |
| Fsu, MPa | L | … | … | 227.5 |
| LT | … | … | 227.5 | |
| ST | … | … | 227.5 | |
| Fbru (e/D = 2.0), MPa | L | … | … | 730.8 |
| LT | … | … | 730.8 | |
| ST | … | … | 730.8 | |
| Fbry (e/D = 2.0), MPa | L | … | … | 489.5 |
| LT | … | … | 489.5 | |
| ST | … | … | 489.5 | |
| e, % | L | 7 | 7 | 7 |
| LT | 5 | 5 | 5 | |
| ST | … | 4 | 4 | |
| E, GPa | 73.77 | 73.77 | 73.77 | |
| Ec, GPa | 75.15 | 75.15 | 75.15 | |
| G, GPa | 28.27 | 28.27 | 28.27 | |
| ν | 0.33 | 0.33 | 0.33 | |
| ρ, kg/m³ | 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
Moduli at temperature
Elongation and exposure effects
| °C | F_tu | F_ty | F_cy | F_su | F_bru | F_bry |
|---|---|---|---|---|---|---|
| 38 | 99.7 | 100 | 99.7 | 99.7 | 99.1 | 98.6 |
| 93 | 96.1 | 98.8 | 98.3 | 95.2 | 95.9 | 92.6 |
| 149 | 89.5 | 94.3 | 93.1 | 88.1 | 90.6 | 84.5 |
| 204 | 85.2 | 79.7 | 81.7 | 74.3 |
Factors in percent of the room-temperature allowable.
Other 2618 Tables
- 2618-T61 Die forging (Table 3.2.13.0(b))
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.