Ti-6Al-2Sn-4Zr-2Mo-STA (Duplex annealed) Forging: MIL-HDBK-5J Design Allowables
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| Material class | Titanium |
| Alloy / temper / form | Ti-6Al-2Sn-4Zr-2Mo / STA (Duplex annealed) / Forging |
| Specifications | AMS 4976 |
| Handbook | MIL-HDBK-5J, 31 January 2003, section 5.3.3.0, Table 5.3.3.0(c) (pdf page 46 of the chapter file) |
| Dimension bands | 1 |
| Density | 0.164 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 | 0–3 in, area 0–9 in2 | |
|---|---|---|
| Specification | AMS 4976 | |
| Basis | S | |
| Ftu, ksi | LT | 130 |
| ST | 130 | |
| Fty, ksi | LT | 120 |
| ST | 120 | |
| e, % | LT | 10 |
| ST | 10 | |
| E, Msi | 16.5 | |
| Ec, Msi | 18 | |
| G, Msi | 6.2 | |
| ρ, lb/in3 | 0.164 | |
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
| °F | F_cy |
|---|---|
| 100 | 97.3 |
| 200 | 87.2 |
| 300 | 78.8 |
| 400 | 72.6 |
| 500 | 68.6 |
| 600 | 65.9 |
| 700 | 64 |
| 800 | 61.5 |
Factors in percent of the room-temperature allowable.
Other Ti-6Al-2Sn-4Zr-2Mo Tables
- Ti-6Al-2Sn-4Zr-2Mo-Duplex annealed Sheet (Table 5.3.3.0(b))
- Ti-6Al-2Sn-4Zr-2Mo-STA (Duplex annealed) Bar (Table 5.3.3.0(c))
- Ti-6Al-2Sn-4Zr-2Mo-Triplex annealed Sheet (Table 5.3.3.0(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from the chapter tables; check the printed table before use in a certified analysis, and note that MIL-HDBK-5J was superseded by MMPDS, whose later editions may differ.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.