24 July 2021 7000 Series Aluminum Alloy
7022 Aluminum Alloy Bar
7022 aluminium alloy is an alloy in the wrought aluminium-zinc family (7000 or 7xxx series). It is one of the more complex grades in the 7000 series, with at least 87.85% aluminium by weight.
Like most other highly alloyed alloys, 7022 is a high strength alloy, with yield strength of 370 MPa. Designed to be resistant to stress corrosion cracking, it has decent corrosion and oxidation resistance comparable to 7075 aluminium alloy but worse than 7039 aluminium alloy. Good machinability, thermal conductivity and dimensional stability make 7022 alloy a material of choice for plastic injection molds. 7022 alloy can be heat treated to increase tensile strength in expense of workability, with most common grade been T651.
7022 aluminum is a 7000-series aluminum alloy: the main alloying addition is zinc and it is formulated for primary forming into wrought products. 7022 is the Aluminum Association (AA) designation for this material. In European standards, it will be given as EN AW-7022. AlZn5Mg3Cu is the EN chemical designation. Additionally, the AFNOR (French) designation is A-Z4GU. And the UNS number is A97022.
Aluminum Alloy Zinc EN AW 7022 is an alloy that was created to meet the demand of mold manufacturers for a material that could offer the hardness and work capacity necessary for the construction of molds and equipment.
Chemical Composition:
| Chemical Elements | Metric | English |
|---|---|---|
| Aluminum, Al | 88 - 92.4 % | 88 - 92.4 % |
| Chromium, Cr | 0.10 - 0.30 % | 0.10 - 0.30 % |
| Copper, Cu | 0.50 - 1.0 % | 0.50 - 1.0 % |
| Iron, Fe | <= 0.50 % | <= 0.50 % |
| Magnesium, Mg | 2.6 - 3.7 % | 2.6 - 3.7 % |
| Manganese, Mn | 0.10 - 0.40 % | 0.10 - 0.40 % |
| Other, each | <= 0.05 % | <= 0.05 % |
| Other, total | <= 0.15 % | <= 0.15 % |
| Silicon, Si | <= 0.50 % | <= 0.50 % |
| Zinc, Zn | 4.3 - 5.2 % | 4.3 - 5.2 % |
| Zr+Ti | <= 0.20 % | <= 0.20 % |
Physical Properties:
| Module Elastic N / mm² | Weight specific gms / cm³ | Temperature of fusion in ° C | Coefficient of linear dilation m / mK | Conductivity thermal W / mK | Resistivity electric m | Conductivity electric % IACS | Potential of dissolution V |
|---|---|---|---|---|---|---|---|
| 72.000 | 2,76 | 475 - 630 | 23,6 | 120 - 150 | 38-52 | 18-22 | -0,81 |