A.1.5. 7075 Aluminium-Zinc Alloy

PRODUCT

Type

Metal Alloy

Chemical Composition

5.6% Zn, 2.5% Mg, 1.6% Cu, 0.3% Cr, Rem. Al

Manufacturer

Corus

30 Millbank

London SW1 4WY

UK

Tel: 0800 008 400

Fax:

Email: customer-services@corusgroup.com

www.corusgroup.com

 

Aluminium Pechiney

Usine de Mercus

09400 Mercus Garrabet

France

Tel: +33 (0)5 61 02 42 00

Fax: +33 (0)5 61 02 42 01

Email:

www.aluminium-pechiney.com

 

Corus Metallversteib Deutschland

Kennedydamm 17

D-40476 Dusseldorf

Germany

Tel: +49 211 4926-0

Fax: +49 211 4926-282

Email:

 

EXPERIENCE & AVAILABILITY

Development Status

Commercial Product

Cost Range

Very Low

Lot Reproducibility

DTD 5074A, AFNOR A-Z5GU, Werk No. 3.4364, AA 7075

Space Experience

Good

GENERAL PROPERTIES (Physical, Mechanical, Thermal, Electrical, Optical)

Nature

Typical Value

Remarks

Specific Gravity

2.80

@ Room Temperature

Ultimate Tensile Strength

400 to 650 MPa

@ Room Temperature

Proof Stress (0.2%)

340 to 595 MPa

@ Room Temperature

Elongation at Break

3% to 8%

@ Room Temperature

Thermal Conductivity

134 W m -1 C -1

@ Room Temperature

Thermal Expansion Coefficient

22 x 10-6 C -1

@ Room Temperature

Electrical Resistivity

8.9 x 10-8 W m

@ Room Temperature

PROPERTIES RELEVANT TO SPACE USE

Nature

Typical Value

Type of Test

Corrosion

Poor resistance to atmospheric corrosion and should always be protected.

Although anodising is possible, the degree of protection it affords is not as great as with other Aluminium alloys, so painting is the recommended treatment.

 

Stress Corrosion

In some tempers it has moderate to low resistance. (Refer to ECSS-Q-70-36 for approval of this alloy.) Furthermore, in the T6 condition, it is susceptible to stress corrosion. However, this can be overcome by application of the T73 treatment (overaging), which provides a high resistance to stress corrosion.

 

SPECIAL RECOMMENDATIONS

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