A.1.7. 2219 Aluminium-Copper-Manganese Alloy (ISO AlCu6Mn)
PRODUCT
Type				Metal Alloy
Chemical Composition				Cu 5.8 to 6.8%, Mn 0.2 to 0.4%, Rem. Al
Manufacturer	Several: e.g. Pechiney Rhenalu Issoire BP42 F-63501 Issoire Cedex France				Tel: +33 4 73 55 51 60 / 4 73 55 50 29 Fax: Email: frederic_breda@pechiney.com www.pechiney.com
EXPERIENCE & AVAILABILITY
Development Status				Commercial Product
Cost Range				Low
Lot Reproducibility				AA2219, EN573 AW-2219, DTD 5504A, A-U6MT
Space Experience				Good
GENERAL PROPERTIES (Physical, Mechanical, Thermal, Electrical, Optical)
Nature			Typical Value (depending on heat treatment)				Remarks
Specific Gravity				2.84
Ultimate Tensile Strength				172 to 476 MPa		@ Room Temperature
Yield Strength				70 to 395 MPa		@ Room Temperature
Elongation at Break				7 to 20%		@ Room Temperature
Thermal Conductivity				116 to 170 W m^-1 °C^-1		@ Room Temperature
Thermal Expansion Coefficient				22.3 x 10^-6 °C^-1		@ Room Temperature
Electrical Resistivity				3.9 to 6.2 x 10^-8 W m		@ Room Temperature
PROPERTIES RELEVANT TO SPACE USE
Nature		Typical Value						Type of Test
Corrosion		Relatively poor resistance to corrosion. Protective finish always required.
Stress Corrosion		Resistant (refer to ECSS-Q-70-36). Tempers: T6 and T8 are considered to be Table 1 alloys (“Alloys with high resistance to SCC”).
SPECIAL RECOMMENDATIONS
· Solution treatment temperatures should be closely controlled as higher temperatures may cause solid solution grain boundary melting or eutectic melting which cannot be repaired by subsequent heat treatment. · The alloy can be satisfactorily welded by fusion and resistance welding techniques. · Reheat-treatment of clad material should be done carefully because copper tends to diffuse through the cladding layer to the surface, decreasing corrosion resistance.