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PRODUCT DATA of AA7475-T73
MaterialAA7475-T73
Product DatasheetAlcoa 7475 plate and sheet
General InformationThis is a high strength alloy of very good toughness. It is a derivative of AA 7075 alloy and the AA 7475 version is available in sheet and plate product forms.
Processing and AssemblySolution heat treated and then artificially overaged in order to achieve the best stress corrosion resistance
PrecautionsData for AA7475-T7351 from Aluminum Association.
EXPERIENCE IN PRACTICE
Development StatusCommercial Product
Equivalent DesignationsAA 7475
Space ExperienceGood
PHYSICAL PROPERTIES
Crystal StructureFace centered cubic (fcc)
Specific Gravity2.81
Magnetic PropertiesNonmagnetic
ELASTIC PROPERTIES
Tensile Modulus71.7 GPa
Data Quality: Typical Data
Shear Modulus27 GPa
Data Quality: Typical Data
Poisson Ratio0.33
THERMAL PROPERTIES
Thermal Conductivity138 W/m.K
Thermal Expansion Coefficient23.2 μstrain/°C
Melting Range477 to 635 °C
Specific Heat0.88 J/g.K
RELEVANT PROPERTIES FOR USE IN SPACE COMMUNITY
General Corrosion StatusRequires specific corrosion protection
Stress Corrosion StatusHigh Resistance to SCC: Table 1
Data Quality: Design Data
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
Test:ECSS-Q-ST-70C Rev.1 Table 5.1
Data Quality: Design Data
MachinabilityMachining characteristics are very good in the annealed condition. Use of oil base lubricants for all machining operations is recommended.
WeldingNot normally done to this alloy and no data on techniques available at this time.
AgingHeat treatment may be done. However the parameters of the treatment are proprietary to Alcoa.
SPECIAL RECOMMENDATIONS
Lessons LearnedIn some cases where the Zn content is at the high end of the composition range, this alloy responds poorly to black anodising.