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PRODUCT DATA of AA6061-T6
MaterialAA6061-T6
General InformationProbably the most commonly available, heat treatable aluminum alloy. Very good corrosion resistance. Very good weldability; reduced strength values in the zone of welding. Heat treatable alloy. Medium high strength alloy with a strength higher than 6005A. Medium fatigue strength. Good cold formability in the temper T4. Not suitable for very complex cross sections.
Chemical CompositionAl-1Mg-0.6Si-0.1Cr-0.3Cu
EXPERIENCE IN PRACTICE
Development StatusCommercial Product
Cost RangeVery Low
Space ExperienceGood
PHYSICAL PROPERTIES
Crystal StructureFace centered cubic (fcc)
Specific Gravity2.7
Magnetic PropertiesNonmagnetic
ELASTIC PROPERTIES
Tensile Modulus69 GPa
Data Quality: Limited Laboratory testing
Shear Modulus26 GPa
Data Quality: Typical Data
Poisson Ratio0.33
ELECTRICAL PROPERTIES
Electrical Volume Resistivity4e-8 ohm.m
THERMAL PROPERTIES
Temperature Range217 °C(maximum)
Thermal Conductivity167 W/m.K
Thermal Expansion Coefficient23.6 µstrain/°C
Remark: from RT to 100C
Data Quality: Typical Data
Melting Range582 to 652 °C
Specific Heat0.896 J/g.K
RELEVANT PROPERTIES FOR USE IN SPACE COMMUNITY
General Corrosion StatusNo specific corrosion protection required
Stress Corrosion StatusHigh Resistance to SCC: Table 1
Data Quality: Design Data
EMF vs SCE-0.75 V
Bimetallic CorrosionCan be used in a non-controlled environment: Al alloys, Cd
Can be used in a clean room environment: Mg, Sn-Pb alloys (all), Sn, Pb, Zn, Be
Needs specific measures: All others<
Remark: ECSS-Q-ST-70C Rev.1 table 5.1
Data Quality: Design Data
MachinabilityMachinability in the harder T 4 and T6 tempers is good. It is notably less easy to machine in the annealed temper
WeldingThe alloy has very good welding characteristics and may be welded by all of the common welding techniques.
AgingThe aging precipitation heat treatment is done at 192 C for 8 hours followed by air cooling. This produces the T6 temper
FLUID SYSTEMS COMPATIBILITY
Gaseous Oxygen (GOX)Meets the mechanical impact requirements. No batch test required.
Liquid Oxygen (LOX)Meets the mechanical impact requirements. No batch test required.
Nitrogen Tetroxide (N2O4)SCC susceptibility is low and no fluid decomposition
Hydrazine (HDZE)SCC susceptibility is low and no fluid decomposition