7050 aluminum alloy
The alloy is often used in forged components that require high strength and durability under extreme conditions. 7050 aluminum forgings are typically heat-treated to achieve optimal mechanical properties, making them ideal for critical structural applications.
Descriptions
1. Chemical Composition
The chemical composition of 7050 aluminum alloy is as follows:
Element | Composition (%) |
Aluminum (Al) | Balance |
Zinc (Zn) | 5.7 – 6.7 |
Magnesium (Mg) | 1.9 – 2.6 |
Copper (Cu) | 2.0 – 2.6 |
Zirconium (Zr) | 0.08 – 0.15 |
Iron (Fe) | ≤ 0.15 |
Silicon (Si) | ≤ 0.12 |
Manganese (Mn) | ≤ 0.10 |
Chromium (Cr) | ≤ 0.04 |
Titanium (Ti) | ≤ 0.06 |
Others | ≤ 0.05 each, ≤ 0.15 total |
2. Mechanical Properties
The mechanical properties of 7050 aluminum alloy forgings depend on the heat treatment condition. Below are the typical mechanical properties for 7050-T7451, a common temper used in aerospace applications:
Property | Value |
Tensile Strength | 510 MPa (74,000 psi) |
Yield Strength | 455 MPa (66,000 psi) |
Elongation at Break | 10% |
Hardness (Brinell) | 135 HB |
Modulus of Elasticity | 71.0 GPa (10,300 ksi) |
Fatigue Strength | 160 MPa (23,000 psi) |
Density | 2.83 g/cm³ (0.102 lb/in³) |
Melting Point | 477 – 635 °C (890 – 1175 °F) |
3. Common Forging Product
7050-T7451 Forged Plates
7050 Forged Blocks
7050 Forged Rings
7050 Forged Shafts
7050 Forged Discs
4. Industry standards
ASTM B247: Standard Specification for Aluminum and Aluminum-Alloy Die Forgings, Hand Forgings, and Rolled Ring Forgings.
AMS 4050: Aerospace Material Specification for Aluminum Alloy 7050 Forgings.
AMS 4331: Aerospace Material Specification for Aluminum Alloy 7050-T7451 Plates and Sheets.
ISO 6361: Wrought Aluminum and Aluminum Alloy Sheets, Strips, and Plates.
EN 573-3: European Standard for Aluminum and Aluminum Alloys – Chemical Composition and Form of Wrought Products.
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Applications
Aircraft wing spars, fuselage frames, and landing gear components.
High-strength marine components exposed to harsh environments
Heavy machinery parts and high-stress structural components.
