A.1.2. Aluminium-Copper Alloy (ISO AlCu4Mg1)

PRODUCT

Type

Metal Alloy

Chemical Composition

4.5% Cu, 1.5% Mg, 0.6% Mn, 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

BS L97, BS L98, AFNOR A-U4G1, DIN 1725, AA 2024

Space Experience

Good

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

Nature

Typical Value

Remarks

Specific Gravity

2.77

@ Room Temperature

Ultimate Tensile Strength

385 to 495 MPa

@ Room Temperature

Proof Stress (0.2%)

260 to 470 MPa

@ Room Temperature

Elongation at Break

3% to 16%

@ Room Temperature

Thermal Conductivity

150 to 180 W m -1 C -1

@ Room Temperature

Thermal Expansion Coefficient

22 to 24 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

Relatively poor resistance to atmospheric corrosion and should always be anodised or chromated and painted.

 

Stress Corrosion

Only limited forms and temper conditions have high resistance to stress corrosion cracking. (Refer to ECSS-Q-70-36 for approval of this alloy). Furthermore, only rod and bar forms in the T8 condition have a high resistance. Plate, extrusions and forgings have moderate to low resistance.

 

SPECIAL RECOMMENDATIONS

          For precipitation hardened parts, heating above the precipitation temperature may result in susceptibility to intergranular and stress corrosion.

          The room-temperature-aged conditions may become susceptible to intergranular corrosion if the alloy is heated above 65C.