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	PRODUCT DATA of AA5083-H112

Material

AA5083-H112

General Information

Very good weldability. Very good corrosion resistance to seawater and marine atmosphere. High strength alloy with a strength slightly higher than 5086. High fatigue strength. Good cold and stretch formability in soft temper in relation to strength. Difficult to extrude in thin or complex sections. Can be produced in thick plates without internal stress.

Processing and Assembly

Applies to products that may acquire some strain hardening during working at elevated temperature and for which there are mechanical property limits.

Precautions

The 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

Chemical Composition

Al-4.5Mg-0.7Mn-0.2Cr

	EXPERIENCE IN PRACTICE

Development Status

Commercial Product

Cost Range

Low

Lot Reproducibility

Good

Equivalent Designations

AlMg4.5Mn, A-G4.5MC, 3.3547, D54S, AA 5083

Space Experience

Good

	PHYSICAL PROPERTIES

Crystal Structure

Face centered cubic (fcc)

Specific Gravity

2.66

Magnetic Properties

Nonmagnetic

	ELASTIC PROPERTIES

Tensile Modulus

71 GPa

Shear Modulus

26.8 GPa

Poisson Ratio

0.33

	THERMAL PROPERTIES

Temperature Range

66 C(maximum)

Thermal Conductivity

117 W/m.K

Thermal Expansion Coefficient

23.8 µstrain/°C

Specific Heat

0.899 J/g.K

Melting Range

580 to 640 °C

	RELEVANT PROPERTIES FOR USE IN SPACE COMMUNITY

Stress Corrosion Status

High Resistance to SCC: Table 1 Remardk:The 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 Data Quality: Design Data

EMF vs SCE

-0.79 V

Bimetallic Corrosion

Can 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 Learned

The 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