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PRODUCT DATA of AA2017-T4
MaterialAA2017-T4
General InformationThis is a heat treatable (age-hardening) alloy of intermediate strength and good ductility
PrecautionsTypical data from the Aluminium Association (AA). Not for design
Chemical CompositionAl-4Cu-0.6Mg0.7Mn-0.5Si-0.1Cr
EXPERIENCE IN PRACTICE
Development StatusCommercial Product
Equivalent DesignationsAlCuMgSi; UNS A92017; NF A-U46, AA 2017
PHYSICAL PROPERTIES
Crystal StructureFace centered cubic (fcc)
Specific Gravity2.79
Magnetic PropertiesNonmagnetic
ELASTIC PROPERTIES
Tensile Modulus75 GPa
Data Quality: Typical Data
Bulk Modulus27 GPa
Data Quality: Typical Data
THERMAL PROPERTIES
Thermal Conductivity134 W/m.K
Thermal Expansion Coefficient23.6 μstrain/°C
Melting Range513 to 641 °C
Specific Heat0.88 J/g.K
RELEVANT PROPERTIES FOR USE IN SPACE COMMUNITY
General Corrosion StatusRequires specific corrosion protection
Stress Corrosion StatusLow Resistance to SCC: Table 3
Data Quality: Design Data
EMF vs SCE-0.61 V
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-70C Rev.1 table 5.1
Data Quality: Design Data
MachinabilityMachinability is very good for this alloy in the T4 temper. In the annealed condition machinability is less good. Thus it is best to perform machining with the alloy in the T4 condition. Use of oil lubricants is recommended for all machining operations.
WeldingThe alloy may be welded, however welding heat will reduce corrosion resistance. In general welding should be avoided unless heat treatment after welding is possible to restore corrosion resistance. Inert gas welding and resistance welding are the methods that should be used and the alloy is sensitive to cracking so fixturing needs to be such as to reduce any strain during welding.
AgingThis alloy is age hardenable and that occurs naturally at room temperature.