Overview
7075 is a zinc-based aluminum alloy and one of the strongest aluminum grades available as plate. In the T6/T651 temper it approaches the tensile strength of many carbon steels at roughly a third of the weight.
The trade-offs are lower corrosion resistance than 6061, poor weldability and a higher material price, so it is used where strength-to-weight really matters.
Key Properties
Typical values from the MatWeb datasheet for Aluminum 7075-T6; 7075-T651. Machined parts take the properties of the stock they are cut from.
| Property | Value |
|---|---|
| Density | 2.81 g/cm³ |
| Tensile strength | 572 MPa |
| Yield strength | 503 MPa |
| Elongation at break | 9.0 % @ -196 °C |
| Hardness | HB 150 |
| Modulus of elasticity | 71.7 GPa |
| Thermal conductivity | 130 W/m-K |
| Melting range | 477–635 °C |
| Machinability | 70 % |
Typical Applications
- Aerospace and drone structures
- High-load brackets and arms
- Bicycle and motorsport parts
- Molds and tooling plates
Machining Notes
Machines very well and holds tight tolerances; avoid welding. Hard anodizing is recommended for wear or corrosion exposure.
