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	PRODUCT DATA of AA2011-T8

Material

AA2011-T8

General Information

This is an age-hardenable alloy noted for its free-machining characteristics and good mechanical properties

Processing and Assembly

Solution heat treated, cold worked and artificially aged

Precautions

Typical data from the Aluminium Association (AA). Not for design

Chemical Composition

Al-5.5Cu-0.4Pb-0.4Bi

	EXPERIENCE IN PRACTICE

Development Status

Commercial Product

	PHYSICAL PROPERTIES

Crystal Structure

Face centered cubic (fcc)

Specific Gravity

2.83

Magnetic Properties

Nonmagnetic

	ELASTIC PROPERTIES

Tensile Modulus

70.3 GPa Typical data

Shear Modulus

26 GPa Typical data

Poisson Ratio

0.33 GPa Typical data

	MECHANICAL PROPERTIES

Ultimate Tensile Strength

372 MPa(minimum) Data Quality: minimum specification Data

Proof Stress (0.2%)

276 MPa(minimum) Data Quality: minimum specification Data

Elongation

10 %(minimum) Data Quality: minimum specification Data

Fatigue Limit

124 MPa @5x10^8 cycles Data Quality: typical data

Hardness

63 HRb Data Quality: typical data

Shear Strength

241 MPa Data Quality: typical data

	ELECTRICAL PROPERTIES

Electrical Volume Resistivity

3.82e-8 ohm.m

Electrical Conductivity

45.5 %IACS

	THERMAL PROPERTIES

Temperature Range

121 °C(maximum)

Thermal Conductivity

171 W/m.K

Thermal Expansion Coefficient

22.9 µstrain/°C

Specific Heat

0.88 J/g.K

Melting Range

540 to 643 °C

	RELEVANT PROPERTIES FOR USE IN SPACE COMMUNITY

General Corrosion Status

Requires specific corrosion protection

Stress Corrosion Status

High Resistance to SCC: Table 1

Bimetallic Corrosion

Can be used in a non-controlled environment with: Al+alloys, Cd, Sn-Pb alloys, Sn, Pb Can be used in a clean room environment with: as above and Mg, Ni, Monel, Inconel, Ni-Mo alloys, 300 series SS, 400 series SS, Ti and Ti alloys, Zn, Be Needs specific measures: All others Test: ECSS-Q-ST-70-71 table1 Data Quality: Design Data

Machinability

This is a free-machining alloy and both carbide or high-speed tool steel tooling may be used. Carbide tooling is preferred.

Welding

Welding of this alloy is NOT recommended

Aging

Age hardening (typical for T4 temper) is done by a 510 soak for 3 hours followed by water quench. Other temper variations are possible with additional treatment such as heating to 160 C for 14 hours, after solution heating, to produce T 8 temper.

	FLUID SYSTEMS COMPATIBILITY

Gaseous Oxygen (GOX)

Untested

Liquid Oxygen (LOX)

Untested

Nitrogen Tetroxide (N2O4)

Untested

Hydrazine (HDZE)

Untested