7175-T74 is a high-strength aluminum alloy (Zn-Cu-Mg system) in overaged temper, used primarily in aerospace airframes and structures requiring damage-tolerance capability. The T74 condition provides improved stress-corrosion cracking (SCC) resistance and fracture toughness compared to T6, with slightly reduced yield strength, making it suitable for critical aircraft components subject to sustained loads in marine or corrosive environments.
Compliance & Regulations
29 interactive curves for this material
Stress-strain, S-N fatigue and environmental knockdown curves are free with an account.
Create free account| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Ultimate Bearing Strength(Fbru) | 723.9 – 979.1 | MPa | 8 entriesClick to expand | ||
Bearing Yield Strength(Fbry) | 579.2 – 710.2 | MPa | 8 entriesClick to expand | ||
Compressive Modulus(Ec) | 73.77 | GPa | 22°C · Die forging | ||
Compressive Tangent Modulus vs Stress(Etn(σ)) | — | Pa | 6 entriesClick to expand | ||
Compressive Yield Strength(Fcy) | 420.6 – 468.8 | MPa | 8 entriesClick to expand | ||
Elongation at Break(εf) | 4.000 – 7.000 | - | 12 entriesClick to expand | ||
Poisson's Ratio(ν) | 0.3300 | - | 22°C | ||
Shear Modulus(G) | 20.68 | GPa | 22°C · Extrusion | ||
Ultimate Shear Strength(Fsu)4 entries | 289.6 | MPa | 22°C · Die forging · T74a,b · AMS 4149 · t=1.001-2.000 in | ||
| ↳ | 303.4 | MPa | 22°C · Die forging · T74a,b · AMS 4149 · t=1.001-2.000 in | ||
| ↳ | 296.5 | MPa | 22°C · Die forging · T74a,b · AMS 4149 · t=2.001-3.000 in | ||
| ↳ | 296.5 | MPa | 22°C · Die forging · T74a,b · AMS 4149 · t=<1.000 in | ||
S–N Curve (Wöhler)(S–N) | — | Pa | 11 entriesClick to expand | ||
Stress–Strain Curve (buckling region, ≤ 2% strain)(σ–ε (low-strain)) | — | Pa | 12 entriesClick to expand | ||
Ultimate Tensile Strength(σUTS) | 448.2 – 530.9 | MPa | 13 entriesClick to expand | ||
Yield Strength (0.2% offset)(σy) | 379.2 – 461.9 | MPa | 13 entriesClick to expand | ||
Young's Modulus(E) | 70.33 | GPa | 22°C · Die forging | ||
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 2.796 | kg/m³ | 22°C |