7175 Aluminium Alloy

7175 Aluminium Alloy

7175 aluminium is a high strength, heat treatable, forging alloy in the wrought aluminium-magnesium family. It has an excellent combination of toughness, tensile strength and stress corrosion cracking resistance. 7175 alloy is widely used in the aerospace industry and machined fittings.

The T-73 temper eliminates the development of stress corrosion cracking (SCC). 7175 can be heat treated and hardened by cold working or heat treatment. This alloy can be hot worked. Cold working may be done by conventional methods, allowing generous bend radii as with 7075 aluminium alloy.

Typical Physical Properties of 7175 Aluminium Alloy Metrical Imperial
Density 2.6-2.8 g/cm� 0.0939-0.1011 lb/in�
Melting point 482�C 900�F
Typical Mechanical Properties of 7175 Aluminium Alloy Metric Imperial
Elastic modulus 70-80 Gpa 10152-11603 ksi
Poisson's ratio 0.33 0.33
Chemical Composition of 7175 Aluminium Alloy
Al 90.00%
Zn 5.60%
Mg 2.50%
Cu 1.60%
Cr 0.23%
Thermal Properties of 7175 Aluminium Alloy
Thermal conductivity 177 (W/mK) 25�C
Alloy Designation US US Federal European UK Other
7175 AMS 4109 7175-T736 Superseded by AMS 4149 WS 3.4364 ABS 5064
7175 AMS 4148 7175-T6 Die Forgings IPS03-02-000/0008-03
7175 AMS 4149 7175-T74 Forgings� DAN 26/422
7175 AMS 4179 7175-T7452 Forgings� LN 9073
7175 AMS 4344 7175-T73511 Extrusion
7175 MIL-A-22771 7175 T74 / T7452