Ti-6Al-2Sn-4Zr-2Mo-STA (Duplex annealed) Bar: 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 | Titanium |
| Alloy / temper / form | Ti-6Al-2Sn-4Zr-2Mo / STA (Duplex annealed) / Bar |
| Specifications | AMS 4975 |
| 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 | 454 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 | 0–3 in (0–76.2 mm), area 0–16 in2 (0–10320 mm²) | ||
|---|---|---|---|
| Specification | AMS 4975 | ||
| Basis | A | B | |
| Ftu, MPa | LT | 896.3 | 992.8 |
| ST | 896.3 | 992.8 | |
| Fty, MPa | LT | 827.4 | 903.2 |
| ST | 827.4 | 903.2 | |
| e, % | LT | 10 | … |
| ST | 10 | … | |
| E, GPa | 113.8 | 113.8 | |
| Ec, GPa | 124.1 | 124.1 | |
| G, GPa | 42.75 | 42.75 | |
| ρ, kg/m³ | 4540 | 4540 | |
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
| °C | F_cy |
|---|---|
| 38 | 97.3 |
| 93 | 87.2 |
| 149 | 78.8 |
| 204 | 72.6 |
| 26 | 68.6 |
| 316 | 65.9 |
| 371 | 64 |
| 427 | 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) Forging (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from the chapter tables; check the printed table before use in a certified analysis, and note that MIL-HDBK-5J was superseded by MMPDS, whose later editions may differ.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.