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PRODUCT DATA of AA7050-T76
MaterialAA7050-T76
General InformationAluminium-Zinc-Copper-magnesium Alloy which has a good combination of strength, fracture toughness and corrosion resistance
Processing and AssemblySolution heat treated and then artificially overaged in order to achieve a good exfoliation corrosion resistance
Product Typesheet
Chemical CompositionAl-6.2Zn-2.25Mg-2.3Cu-0.12Zr
EXPERIENCE IN PRACTICE
Development StatusCommercial Product
Equivalent DesignationsAA 7050, UNS A97050
PHYSICAL PROPERTIES
Crystal StructureFace centered cubic (fcc)
Magnetic PropertiesNonmagnetic
ELASTIC PROPERTIES
Tensile Modulus70.3 GPa
Shear Modulus26.9 GPa
RELEVANT PROPERTIES FOR USE IN SPACE COMMUNITY
General Corrosion StatusRequires specific corrosion protection
Stress Corrosion StatusModerate Resistance to SCC: Table 2
Remark: Requires Stress corrosion evaluation form
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
SPECIAL RECOMMENDATIONS
Lessons LearnedIn some cases, this alloy responds poorly to black anodising.