24 July 2021 7000 Series Aluminum Alloy
7055 Aluminum Alloy Plate
7055 aluminum alloy is heat treatable wrought aluminum alloy. It has high ultimate tensile strength value of 593 MPa. 7055 aluminum alloy is currently the most advanced commercial high-strength and high-toughness aluminum alloy. It has extremely high strength, good toughness and good stress corrosion resistance, and has a wide range of application prospects.
Chemical Composition:
| Chemical Element | Content (%) |
|---|---|
| Aluminum, Al | 85.9 - 88.5 |
| Zinc, Zn | 7.6 - 8.4 |
| Magnesium, Mg | 1.8 - 2.3 |
| Copper, Cu | 2 - 2.6 |
| Iron, Fe | ≤ 0.15 |
| Zirconium, Zr | 0.080 - 0.25 |
| Manganese, Mn | ≤ 0.050 |
| Chromium, Cr | ≤ 0.040 |
| Silicon, Si | ≤ 0.10 |
| Titanium, Ti | ≤ 0.060 |
| Other (each) | ≤ 0.050 |
| Other (total) | ≤ 0.15 |
Mechanical Properties:
| Mechanical Properties | Metric | English | Comments |
|---|---|---|---|
| Tensile Strength, Ultimate | 593 MPa @Thickness 25.4 mm | 86000 psi @Thickness 1.00 in | LT Direction |
| 648 MPa @Thickness 25.4 mm | 94000 psi @Thickness 1.00 in | Longitudinal Direction | |
| Tensile Strength, Yield | 565 MPa @Thickness 25.4 mm | 82000 psi @Thickness 1.00 in | LT Direction |
| 614 MPa @Thickness 25.4 mm | 89000 psi @Thickness 1.00 in | Longitudinal Direction | |
| Elongation at Break | 9.0 % @Thickness 25.4 mm | 9.0 % @Thickness 1.00 in | LT Direction |
| 12 % @Thickness 25.4 mm | 12 % @Thickness 1.00 in | Longitudinal Direction | |
| Compressive Yield Strength | 669 MPa @Thickness 25.4 mm | 97000 psi @Thickness 1.00 in | Longitudinal Direction |
| Fracture Toughness | 24.2 MPa-m½ @Thickness 25.4 mm | 22.0 ksi-in½ @Thickness 1.00 in | KIC, T-L |
| 29.7 MPa-m½ @Thickness 25.4 mm | 27.0 ksi-in½ @Thickness 1.00 in | KIC, L-T |
Applications:
7055 aluminum alloy is chiefly used in the aerospace sector and other high strength requirement areas.