6061 aluminum alloy
It is one of the most widely used aluminum alloys in the manufacturing industry. It is known for its excellent combination of strength, corrosion resistance, weldability, and machinability.
Descriptions
1. Chemical Composition
The chemical composition of 6061 aluminum alloy is as follows:
Element | Composition(%) |
Aluminum (Al) | Balance |
Magnesium (Mg) | 0.8 – 1.2 |
Silicon (Si) | 0.4 – 0.8 |
Iron (Fe) | ≤ 0.7 |
Copper (Cu) | 0.15 – 0.4 |
Chromium (Cr) | 0.04 – 0.35 |
Zinc (Zn) | ≤ 0.25 |
Titanium (Ti) | ≤ 0.15 |
Manganese (Mn) | ≤ 0.15 |
Others | ≤ 0.05 each, ≤ 0.15 total |
2. Mechanical Properties
The mechanical properties of 6061 aluminum alloy forgings vary depending on the heat treatment condition. Below are the typical mechanical properties for 6061-T6, which is the most common temper:
Property | Value |
Tensile Strength | 310 MPa (45,000 psi) |
Yield Strength | 276 MPa (40,000 psi) |
Elongation at Break | 12% |
Hardness (Brinell) | 95 HB |
Modulus of Elasticity | 68.9 GPa (10,000 ksi) |
Fatigue Strength | 96.5 MPa (14,000 psi) |
Density | 2.7 g/cm³ (0.0975 lb/in³) |
Melting Point | 582 – 652 °C (1080 – 1200 °F) |
3. Common Forging Product
6061-T6 Forged Rings
6061 Forged Blocks
6061 Forged Shafts
6061 Forged Flanges
6061 Forged Discs
4. Industry standards
ASTM B247: Standard Specification for Aluminum and Aluminum-Alloy Die Forgings, Hand Forgings, and Rolled Ring Forgings.
AMS 4121: Aerospace Material Specification for Aluminum Alloy Forgings.
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 fittings, wings, and fuselage components.
Suspension components, wheels, and chassis parts.
Machinery parts, hydraulic pistons, and valves.
Boat hulls, masts, and other structural components.
