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
-