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PRODUCT DATA of AA2011-T8
MaterialAA2011-T8
General InformationThis is an age-hardenable alloy noted for its free-machining characteristics and good mechanical properties
Processing and AssemblySolution heat treated, cold worked and artificially aged
PrecautionsTypical data from the Aluminium Association (AA). Not for design
Chemical CompositionAl-5.5Cu-0.4Pb-0.4Bi
EXPERIENCE IN PRACTICE
Development StatusCommercial Product
PHYSICAL PROPERTIES
Crystal StructureFace centered cubic (fcc)
Specific Gravity2.83
Magnetic PropertiesNonmagnetic
ELASTIC PROPERTIES
Tensile Modulus70.3 GPa
Typical data
Shear Modulus26 GPa
Typical data
Poisson Ratio0.33 GPa
Typical data
ELECTRICAL PROPERTIES
Electrical Volume Resistivity3.82e-8 ohm.m
Electrical Conductivity45.5 %IACS
THERMAL PROPERTIES
Temperature Range121 °C(maximum)
Thermal Conductivity171 W/m.K
Thermal Expansion Coefficient22.9 µstrain/°C
Melting Range540 to 643 °C
Specific Heat0.88 J/g.K
RELEVANT PROPERTIES FOR USE IN SPACE COMMUNITY
General Corrosion StatusRequires specific corrosion protection
Stress Corrosion Status High Resistance to SCC: Table 1
Bimetallic CorrosionCan 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
MachinabilityThis is a free-machining alloy and both carbide or high-speed tool steel tooling may be used. Carbide tooling is preferred.
WeldingWelding of this alloy is NOT recommended
AgingAge 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