2618-T61 Hand forging: MIL-HDBK-5J Design Allowables
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| 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 | 0.1 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 | 0–2 in, area 0–144 in2 | 2–3 in, area 0–144 in2 | 3.001–4.000 in, area 0–144 in2 | |
|---|---|---|---|---|
| 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, ksi | L | 58 | 57 | 56 |
| LT | 55 | 55 | 53 | |
| ST | … | 52 | 51 | |
| Fty, ksi | L | 47 | 46 | 45 |
| LT | 42 | 42 | 40 | |
| ST | … | 42 | 39 | |
| Fcy, ksi | L | … | … | 44 |
| LT | … | … | 42 | |
| ST | … | … | 40 | |
| Fsu, ksi | L | … | … | 33 |
| LT | … | … | 33 | |
| ST | … | … | 33 | |
| Fbru (e/D = 2.0), ksi | L | … | … | 106 |
| LT | … | … | 106 | |
| ST | … | … | 106 | |
| Fbry (e/D = 2.0), ksi | L | … | … | 71 |
| LT | … | … | 71 | |
| ST | … | … | 71 | |
| e, % | L | 7 | 7 | 7 |
| LT | 5 | 5 | 5 | |
| ST | … | 4 | 4 | |
| E, Msi | 10.7 | 10.7 | 10.7 | |
| Ec, Msi | 10.9 | 10.9 | 10.9 | |
| G, Msi | 4.1 | 4.1 | 4.1 | |
| ν | 0.33 | 0.33 | 0.33 | |
| ρ, lb/in3 | 0.1 | 0.1 | 0.1 | |
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
| °F | F_tu | F_ty | F_cy | F_su | F_bru | F_bry |
|---|---|---|---|---|---|---|
| 100 | 99.7 | 100 | 99.7 | 99.7 | 99.1 | 98.6 |
| 200 | 96.1 | 98.8 | 98.3 | 95.2 | 95.9 | 92.6 |
| 300 | 89.5 | 94.3 | 93.1 | 88.1 | 90.6 | 84.5 |
| 400 | 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.