7075 T6 T62 T7351 aluminum alloy sheet plate

7075 T6 T62 T7351 aluminum alloy sheet plate is currently the most widely used 7 * * * aviation Aluminum Alloy, main supply varieties of aluminum or aluminum, heat treatment condition of O, T6, T73, T76. The static strength of T6 is the highest, the ductility is the lowest and the fatigue is the worst. It is sensitive to stress corrosion cracking, and toughness decreases with the decrease of temperature. So the T6 state is not applied to cryogenic working parts. T73 has the lowest state strength, but has high fracture toughness and excellent resistance to stress corrosion cracking and denudation. The performance of T76 is between T6 and T73. Compared with T6 state, it has low strength but good resistance to stress corrosion. Compared with T73 state, its strength is high, but its stress corrosion resistance is poor.

Chemical Composition of 7075 alloy

Alloy

Si

Fe

Cu

Mn

Mg

Cr

Ni

Zn

Ti

Zr

Others

Al

Each

Total

7075

0.40

0.50

1.2~2.0

0.3

2.1~2.9

0.18~0.28

~

5.1~6.1

0.20

~

0.05

0.15

Remainder

Alloy	Alloy Series	Main features	σb  Value/MPa	Working Temperature/℃
7075	7075 series	7075 T6 T62 T7351 aluminum alloy sheet plate is currently the most widely used 7 * * * aviation Aluminum Alloy, main supply varieties of aluminum or aluminum, heat treatment condition of O, T6, T73, T76. The static strength of T6 is the highest, the ductility is the lowest and the fatigue is the worst. It is sensitive to stress corrosion cracking, and toughness decreases with the decrease of temperature. So the T6 state is not applied to cryogenic working parts. T73 has the lowest state strength, but has high fracture toughness and excellent resistance to stress corrosion cracking and denudation. The performance of T76 is between T6 and T73. Compared with T6 state, it has low strength but good resistance to stress corrosion. Compared with T73 state, its strength is high, but its stress corrosion resistance is poor.	421～538	<125