7075 aluminum alloy
7075 aluminum forgings are typically heat-treated to achieve their peak strength, and they are known for their ability to withstand extreme conditions.
Descriptions
1. Chemical Composition
The chemical composition of 7075 aluminum alloy is as follows:
Element | Composition (%) |
Aluminum (Al) | Balance |
Zinc (Zn) | 5.1 – 6.1 |
Magnesium (Mg) | 2.1 – 2.9 |
Copper (Cu) | 1.2 – 2.0 |
Chromium (Cr) | 0.18 – 0.28 |
Iron (Fe) | ≤ 0.50 |
Silicon (Si) | ≤ 0.40 |
Manganese (Mn) | ≤ 0.30 |
Titanium (Ti) | ≤ 0.20 |
Others | ≤ 0.05 each, ≤ 0.15 total |
2. Mechanical Properties
The mechanical properties of 7075 aluminum alloy forgings depend on the heat treatment condition. Below are the typical mechanical properties for 7075-T6, the most common temper:
Property | Value |
Tensile Strength | 572 MPa (83,000 psi) |
Yield Strength | 503 MPa (73,000 psi) |
Elongation at Break | 11% |
Hardness (Brinell) | 150 HB |
Modulus of Elasticity | 71.7 GPa (10,400 ksi) |
Fatigue Strength | 160 MPa (23,000 psi) |
Density | 2.81 g/cm³ (0.101 lb/in³) |
Melting Point | 477 – 635 °C (890 – 1175 °F) |
3. Common Forging Product
7075-T6 Forged Plates
7075 Forged Blocks
7075 Forged Rings
7075 Forged Shafts
7075 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 7075 Forgings.
AMS 4045: Aerospace Material Specification for Aluminum Alloy 7075-T6 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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