7075 aluminum bar(rod) main use and commonly used state
7075 aluminum bar(rod) common temper:
O, T6, T651, T7351, T7651, T6511
It is used to make aircraft structures and other high-stress structural parts that require high strength and strong corrosion resistance, such as aircraft upper and lower wing panels, purlins, bulkheads, etc. The solution treatment is good in plasticity, heat treatment strengthening is particularly good, has high strength below 150°C, and has particularly good low temperature strength, poor welding function, stress corrosion cracking tendency, and double stage aging can improve anti-SCC function.
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Features:
Zinc is the main alloying element of aluminum alloys, but sometimes there is a small increase in magnesium and copper. During this time, the ultra-hard aluminum alloy is rich in zinc, lead, magnesium and copper alloys, which is close to the hardness of steel, heat-strengthened, is a high-strength heat-treatable alloy, corrosion resistance is normal, good mechanical function 7075 aluminum bar(rod)
Heat treatment
Zinc is the main alloying element in 7075 aluminum bar(rod) . Addition of magnesium to alloys containing 3%-7.5% zinc can form MgZn2 with significant strengthening effect, making the heat treatment of the alloy much better than aluminum-zinc binary alloy.
By increasing the content of zinc and magnesium in the alloy, the tensile strength will be further improved, but its ability to resist stress corrosion and anti-shedding corrosion will be reduced.
When subjected to heat treatment, very high strength properties can be achieved. 7075 data usually participate in a small number of copper, chromium and other alloys, the Department of the edge of the A7075-aluminum alloy is particularly top grade, known as the best aluminum alloy products, high strength, far better than any soft steel.
chemical composition:
Silicon Si: 0.40
Iron Fe: 0.50
Copper Cu: 1.2-2.0
Manganese Mn: 0.30
Magnesium Mg: 2.1-2.9
Chrome Cr: 0.18-0.28
Zinc Zn:5.1-6.1
Titanium Ti: 0.20
Aluminum Al: excess
Others:
Single: 0.05 Calculated: 0.15
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