7050 Aluminum T74 is a high-strength Al-Zn-Mg-Cu alloy in the overaged condition, achieving yield strengths of 435–470 MPa with improved stress-corrosion cracking (SCC) resistance and fracture toughness compared to T73 through controlled thermal aging. This temper is specified for critical aerospace structures, particularly in wings and fuselage applications where sustained tensile loads and corrosive environments demand superior damage tolerance and fatigue performance.
Compliance & Regulations
10 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 | |
|---|---|---|---|---|---|
Compressive Modulus(Ec) | 10,600 | ksi | 22°C · Hand Forging | ||
Compressive Tangent Modulus vs Stress(Etn(σ))2 entries | Curve (10 pts) | ksi | 21°C · L | ||
| ↳ | Curve (11 pts) | ksi | 21°C · ST | ||
Poisson's Ratio(ν) | 0.3300 | - | 22°C | ||
Shear Modulus(G) | 3,900 | ksi | 22°C · Hand Forging | ||
S–N Curve (Wöhler)(S–N)4 entries | Curve (40 pts) | ksi | 21°C · L | ||
| ↳ | Curve (40 pts) | ksi | 21°C · L | ||
| ↳ | Curve (40 pts) | ksi | 21°C · L | ||
| ↳ | Curve (40 pts) | ksi | 21°C · L | ||
Stress–Strain Curve (buckling region, ≤ 2% strain)(σ–ε (low-strain))4 entries | Curve (8 pts) | ksi | 21°C · L | ||
| ↳ | Curve (6 pts) | ksi | 21°C · L | ||
| ↳ | Curve (6 pts) | ksi | 21°C · ST | ||
| ↳ | Curve (6 pts) | ksi | 21°C · ST | ||
Young's Modulus(E) | 10,200 | ksi | 22°C · Hand Forging |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 0.1020 | lb/in³ | 22°C |