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PRODUCT DATA of AA7075-T6
MaterialAA7075-T6
Product DatasheetAlcoa 7075 plate and sheet
Alcoa alloy 7075
General InformationThe T6 condition has low fracture toughness at room temperarture and cryogenic temperatures
Processing and AssemblySolution heat treated and then artificially aged. Mechanical property limits not affected by cold working
Chemical Composition5.6% Zn, 2.5% Mg, 1.6% Cu, 0.3% Cr, Rem. Al
Name of ManufacturerCorus
EXPERIENCE IN PRACTICE
Development StatusCommercial Product
Cost RangeVery Low
Equivalent DesignationsDTD 5074A, AFNOR A-Z5GU, Werk No. 3.4364, AA 7075, AA7075
Space ExperienceGood
PHYSICAL PROPERTIES
Crystal StructureFace centered cubic (fcc)
Specific Gravity2.8
Remark:@RT
Magnetic PropertiesNonmagnetic
ELECTRICAL PROPERTIES
Electrical Volume Resistivity8.9e-8 ohm.m
Remark:@ Room Temperature
THERMAL PROPERTIES
Temperature Range121 °C(maximum)
Thermal Conductivity134 W/m.K
Remark: @ Room temperature
Thermal Expansion Coefficient22 μstrain/°C
Remark: @ Room temperature
Specific Heat0.837 J/g.K
Remark: @ Room temperature
RELEVANT PROPERTIES FOR USE IN SPACE COMMUNITY
General Corrosion StatusRequires specific corrosion protection
Atmospheric CorrosionPoor resistance to atmospheric corrosion and should always be protected. Although anodising is possible, the degree of protection it affords is not as great as with other Aluminium alloys, so painting is the recommended treatment.
Stress Corrosion StatusLow Resistance to SCC: Table 3
Remark: Not suitable for structural applications. For high stress applications see ECSS-Q-ST-70-36C
Data Quality: Design Data
EMF vs SCE-0.74 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
Test:ECSS-Q-ST-70C Rev.1 Table 5.1
Data Quality: Design Data
FLUID SYSTEMS COMPATIBILITY
Gaseous Oxygen (GOX)Untested
Liquid Oxygen (LOX)Untested
Nitrogen Tetroxide (N2O4)SCC susceptibility is low and no fluid decomposition
Hydrazine (HDZE)Untested
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