(anonymous)
EN AW-7075
Product Description
Aluminium alloy 7075 is one of the strongest commercially available aluminium alloys, belonging to the 7000-series. Zinc and copper additions give high specific strength with good toughness and fatigue resistance. Note: 7075 is not suitable for fusion welding and has inherently low corrosion resistance. Anodising is recommended; colour variation may result.
Key Characteristics
• Highest strength grade in this range
• Very good machinability despite high strength
• Good toughness and fatigue resistance
• NOT suitable for fusion welding
• Low inherent corrosion resistance — anodising strongly recommended
• Colour variation possible after anodising
Mechanical Properties — EN 485-2
| Tensile Strength(Rm) | 503MPa(min) |
|---|---|
| Yield Strength(Rp0.2) | 435MPa(min) |
| Elongation at Break(A50) | 7%(min) |
| Hardness | ~150HB(Brinell,ISO6506) |
| Elastic Modulus(E) | ~72GPa |
| Density | 2.81g/cm3 |
| Thermal Conductivity | ~130W/m·K |
| Coeff.of Thermal Expansion | 23.6×10-6/K(20-100℃) |
| Melting Range | 477-635℃ |
| Electrical Conductivity | ~33%IACS |
$$ 23.6\times10^{-6}/K(20-1000{}C) $$
$$ 477{6}3-635\ {{}^{\circ}}\mathbf C, $$
Chemical Composition — EN 573-3
| Silicon(Si) | ≤0.40% |
|---|---|
| Iron(Fe) | ≤0.50% |
| Copper(Cu) | 1.20-2.00% |
| Manganese(Mn) | ≤0.30% |
| Magnesium(Mg) | 2.10-2.90% |
| Chromium(Cr) | 0.18-0.28% |
|---|---|
| Zinc(Zn) | 5.10-6.10% |
| Titanium(Ti) | ≤0.20% |
| Aluminium(Al) | Remainder |
Machining Notes
Very good machinability at high cutting speeds with carbide tooling and flood coolant. Stress-relieved stock minimises distortion during aggressive material removal. Do not specify for welded assemblies. For corrosion protection specify anodising or chromate conversion coating.
Typical Applications
Aerospace structural components, wing spars, fuselage frames, defence equipment, high-performance sporting goods, precision tooling, gears and shafts under high dynamic load.