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PRODUCT DATA of AA5456-H323
MaterialAA5456-H323
Processing and AssemblyFabricated to have good resistance to stress corrosion cracking
Chemical CompositionAl-5.1Mg-0.8Mn-0.12Cr
EXPERIENCE IN PRACTICE
Development StatusCommercial Product
Cost RangeLow
Lot ReproducibilityGood
Equivalent DesignationsAA 5456
Space ExperienceGood
PHYSICAL PROPERTIES
Crystal StructureFace centered cubic (fcc)
Specific Gravity2.65
Magnetic PropertiesNonmagnetic
ELASTIC PROPERTIES
Shear Modulus27.1 GPa
Poisson Ratio0.33
ELECTRICAL PROPERTIES
Electrical Volume Resistivity5.9e-8 ohm.m
THERMAL PROPERTIES
Temperature Range66 °C(maximum)
Thermal Conductivity117 W/m.K
Thermal Expansion Coefficient23.9 μstrain/°C
Melting Range571 to 638 °C
Specific Heat0.963 J/g.K
RELEVANT PROPERTIES FOR USE IN SPACE COMMUNITY
Stress Corrosion StatusHigh Resistance to SCC: Table 1
Remark: acc. to ECSS-Q-ST-70-36C
Data Quality: Design Data
EMF vs SCE-0.79 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
WeldingExcellent (fusion and resistance methods)
SPECIAL RECOMMENDATIONS
Lessons LearnedThe alloy is not recommended for continuous service at temperatures above 66°C because of accelerated aging at elevated temperatures which may increase the susceptibility of the alloy to stress corrosion cracking