About Alloy
Aluminum alloy 7175 is a high-strength alloy primarily composed of aluminum, zinc, and magnesium. It belongs to the 7xxx series of aluminum alloys, which are known for their excellent strength-to-weight ratio and toughness. Alloy 7175 is specifically designed for applications requiring superior strength and stress corrosion resistance. It offers good machinability in the heat-treated condition and retains its mechanical properties at elevated temperatures. Commonly used in aerospace and military applications for structural components, aircraft fuselage frames, and wing structures, alloy 7175 demonstrates reliability and performance in environments where durability and reliability under high stress are critical. Its combination of high strength and lightweight properties makes it suitable for industries requiring materials capable of withstanding demanding operational conditions.
Product Form
AMS 4109 7175-T736 Superseded by AMS 4149
AMS 4148 7175-T6 Die Forgings
AMS 4149 7175-T74 Forgings
AMS 4179 7175-T7452 Forgings
AMS 4344 7175-T73511 Extrusion
MIL-A-22771 7175 T74 / T7452
Chemical Composition
| Element | Percentage (%) |
| Aluminum (Al) | 87.5 - 91.0 |
| Zinc (Zn) | 5.8 - 6.8 |
| Magnesium (Mg) | 1.9 - 2.6 |
| Copper (Cu) | 1.2 - 2.0 |
| Manganese (Mn) | 0.10 (max) |
| Chromium (Cr) | 0.18 - 0.28 |
| Iron (Fe) | 0.50 (max) |
| Silicon (Si) | 0.40 (max) |
| Titanium (Ti) | 0.20 (max) |
| Other Elements | 0.15 (max) |
Property
| Mechanical Property | Value |
| Tensile Strength | 515 - 595 MPa |
| Yield Strength (0.2% offset) | 435 - 485 MPa |
| Elongation (at 50 mm) | 7 - 10% |
| Hardness (Brinell) | 150 - 195 HB |
| Modulus of Elasticity | 71 GPa |
| Poisson's Ratio | 0.33 |
| Density | 2.78 g/cm3 |
Application
Aerospace: Aircraft structural components, fuselage frames, wing structures
Military: Missile parts, vehicle armor
High-Performance Sports Equipment: Bicycle frames, components requiring high strength
Industrial: High-strength structural applications where durability and reliability under stress are critical
Aluminum alloy 7175 is chosen for its exceptional strength-to-weight ratio, toughness, and corrosion resistance, making it suitable for aerospace, military, high-performance sports equipment, and industrial applications where robust materials are essential.
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