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| PRODUCT DATA of AA5083-H38 |
| Material | AA5083-H38 |
| 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 | Strain hardened and stabilized to a fully hard condition |
| Precautions | The alloy is prohibited 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, AA 5083 |
| EXPERIENCE IN PRACTICE |
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| Equivalent Designations | AlMg4.5Mn, A-G4.5MC, 3.3547, D54S, AA 5083 |
| PHYSICAL PROPERTIES |
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| Crystal Structure | Face centered cubic (fcc) |
| Specific Gravity | 2.66 |
| Magnetic Properties | Nonmagnetic |
| ELASTIC PROPERTIES |
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| Tensile Modulus | 71 GPa |
| Shear Modulus | 26.8 GPa |
| MECHANICAL PROPERTIES |
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| Ultimate Tensile Strength | 400 MPa |
| Proof Stress (0.2%) | 335 MPa |
| Elongation | 9 % |
| Hardness | 115 |
| Shear Strength | 220 MPa |
| ELECTRICAL PROPERTIES |
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| Electrical Volume Resistivity | 6e-8 ohm.m |
| Electrical Conductivity | 28.5 %IACS |
| THERMAL PROPERTIES |
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| 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 |
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| General Corrosion Status | No specific corrosion protection required |
| Stress Corrosion Status | Moderate Resistance to SCC: Table 2 Remark: acc. to ECSS-Q-ST-70-36C 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 Remark: ECSS-Q-ST-70C Rev.1 table 5.1 Data Quality: Design Data |
| SPECIAL RECOMMENDATIONS |
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| Lessons Learned | The alloy is prohibited 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 |