7A09 is an aviation super-hard aluminum alloy with high strength and good wear resistance. 7A09 is an Al-Zn-Mg-Cu super-hard aluminum. This alloy was used in the aircraft manufacturing industry in the late 1940s and is still in the aviation industry. Ultra-high-strength deformed aluminum alloy widely used. Its characteristic is that the plasticity after solution treatment is good, and the heat treatment strengthening effect is particularly good.
7A09 is an aviation super-hard aluminum alloy with high strength and good wear resistance.
7A09 is an Al-Zn-Mg-Cu superhard aluminum. This alloy was used in the aircraft manufacturing industry in the late 1940s and is still widely used in the aviation industry. It is characterized by good plasticity after solution treatment, particularly good heat treatment strengthening effect, high strength below 150 °C, and particularly good low temperature strength; poor weldability; stress corrosion cracking tendency; need to be coated with aluminum or other Protection processing is used. Two-stage aging improves the ability of the alloy to resist stress corrosion cracking. The plasticity in the annealed and quenched state is slightly lower than the same state of 2A12. Slightly better than 7A04, the static fatigue of the sheet. Notch sensitive, stress corrosion performance is better than 7A04.
7A09 is mainly used to manufacture aircraft structures and other high-stress structural parts that require high strength and corrosion resistance, such as aircraft, lower wing panels, purlins, etc. Good solution after solution treatment, good heat treatment strengthening effect, good strength below 150 degrees, and particularly good low temperature strength, poor welding performance, stress corrosion cracking tendency. Also widely used in mold processing, mechanical equipment, fixtures, aerospace industry, blow molding (bottle) mold, ultrasonic plastic welding mold, golf head, shoe mold, paper mold, foam molding, dewaxing mold, machinery Equipment, used to make high-end aluminum alloy bicycle frame. In 2014, it will be used for the first time as the body material of the smartphone OPPO N3.
|Alloy grade||Silicon Si||Iron Fe||Copper Cu||Manganese Mn||Magnesium Mg||Chromium Cr||Zinc Zn||Titanium Ti||other||Aluminum AL|
|New grade||Old grade||0.5||0.5||1.2-2.0||0.15||2.0-3.0||0.16-0.30||5.1-6.1||0.1||Each||total|
|Aluminum alloy grade and||tensile strength||Yield Strength||Elongation /%|
|Aluminum alloy grade and status|| Thermal expansion coefficient |
(20-100 ° C)
| Melting point range |
| Conductivity |
20 ° C (68 ° F)
| Resistivity 20 ° C (68 ° F) |
| density |
(20 ° C) (g / cm3)
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