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PRODUCT DATA of AA6063
MaterialAA6063
General InformationAluminium-Magnesium-Silicon Alloy (ISO AlMgSi). This is generally considered to be an extrusion alloy that is heat treatable for strengthening Very good corrosion resistance. Very good weldability. Medium strength heat treatable alloy slightly lower than 6005A. Medium fatigue strength. Good cold formability especially in temper T4. Suitable for very complex cross sections.
Chemical Composition0.4% to 0.9% Mg, 0.3% to 0.7% Si, Rem. Al
Name of ManufacturerCorus
EXPERIENCE IN PRACTICE
Development StatusCommercial Product
Cost RangeVery Low
Space ExperienceGood
PHYSICAL PROPERTIES
Crystal StructureFace centered cubic (fcc)
Specific Gravity2.7
Magnetic PropertiesNonmagnetic
ELECTRICAL PROPERTIES
Electrical Volume Resistivity3.4e-8 ohm.m
@ Room Temperature
THERMAL PROPERTIES
Temperature Range217 °C(maximum)
Thermal Conductivity197 to 201 W/m.K
@ Room Temperature
Thermal Expansion Coefficient23 µstrain/°C
@ Room Temperature
RELEVANT PROPERTIES FOR USE IN SPACE COMMUNITY
General Corrosion StatusNo specific corrosion protection required
Atmospheric CorrosionModerate resistance to atmospheric corrosion. For more severe environments, part can be either: Chromated, Chromated and painted, Sulphuric anodised, or Chromic anodised.
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 is considered to be average for this alloy
WeldingThe alloy is readily welded by all of the conventional methods.
AgingAging is done at a temperature of 193 C for 8 hours for T 6 and T 62 tempers. Age at 182 C for 3 hours to get T5 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