7020
UNS A97020
Description
Aluminum alloy 7020 is a heat treatable alloy with zinc added as the main alloying element that age hardens naturally and therefore will recover properties in a heat affected zone after welding. The alloy has characteristics of good weldability, average mechanical strength, good balance between toughness and stress corrosion resistance. When welding, aesthetic anodizing and brazing or soldering is not suitable; however protective anodizing can be performed if required. In addition, machining of 7020 alloy is good, but formability is relatively low which limits the complexity of the shapes that can be extruded.
Chemical Component
| Al | Fe | Cu | Mg | Mn | Zn | Zr | Zr + Ti | Cr | Si | Others |
|---|---|---|---|---|---|---|---|---|---|---|
| Balance | 0.40% max | 0.20% max | 1.0-1.4% | 0.050-0.50% | 4.0-5.0% | 0.080-0.20% | 0.80-0.25% | 0.10-0.35% | 0.35% max | 0.05% max (each) 0.15% max (total) |
Basic Information
| Items | 7020 |
|---|---|
| Catalog | ACAM-Al-A022 |
| Density | 2.78 g/cm3 |
| Thermal Expansion Co-efficient (20-100 °C) | 23.1 µm/m°C |
| Electrical Conductivity | 37.5 IACS |
| Electrical Resistivity | 0.046 microhm·m |
| Thermal Conductivity | 137 W/mK |
| Modulus of Elasticity | 68 GPa |
Material Forms
Alfa Chemistry offers aluminum alloy 7020 in a variety of forms, including Sheet, Plate, Strip, Bar and Extrusions.
Mechanical Properties
| Material | Temper | Tensile Strength, MPa | Yield Strength, MPa | Elongation, % |
|---|---|---|---|---|
| Alloy 7020 Plate | T651 | 330-350 | 260-280 | 7-10 |
Mechanical Properties
| Forming | Machining | Brazing/Soldering | Protective Anodising | Aesthetic Anodising |
|---|---|---|---|---|
| Good | Good | Not suitable | Fair | Not suitable |
Features
- Very good Mechanical Strengths
- Good resistance to fatigue strength
- Good Machinability
Applications
Aluminum alloy 7020 can be used in a variety of applications, including:
- Frame manufacture, e.g. motorbike or bicycle frames
- Military bridges
- In armored vehicles
- Rail transport
- Aircraft storage containers
* Technical data included herein should be used as a guideline only, and should not be construed as maximum or minimum values for specification or for final design, or for a particular use or application. The data may be revised anytime without notice.
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Alfa Chemistry is a manufacturer of standard & custom specialty metals & alloys. We stock a wide variety of alloys in different shapes and specifications. If you can't find the product or specification you need, please contact us directly.
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