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| PRODUCT DATA of AA2219-T |
| Material | AA2219-T |
| Safety Datasheet | msds_aa2219 |
| General Information | This alloy was developed to provide for applications at temperatures up to 315 C |
| Product Type | Metal Alloy |
| Chemical Composition | Cu 5.8 to 6.8%, Mn 0.2 to 0.4%, Rem. Al |
| Name of Manufacturer | Several: e.g. Pechiney Rhenalu Issoire |
| EXPERIENCE IN PRACTICE |
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| Development Status | Commercial Product |
| Cost Range | Low |
| Equivalent Designations | Aluminium-Copper-Manganese Alloy (ISO AlCu6Mn), AA 2219, EN573 AW-2219, DTD 5504A, A-U6MT |
| Space Experience | Good |
| PHYSICAL PROPERTIES |
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| Crystal Structure | Face centered cubic (fcc) |
| Specific Gravity | 2.84 |
| Magnetic Properties | Nonmagnetic |
| ELASTIC PROPERTIES |
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| Tensile Modulus | 75.8 GPa |
| Shear Modulus | 27.8 GPa Remark: For sheet and plate |
| Bulk Modulus | 80 GPa (estimate) |
| Speed of Sound (longitudinal) | 5100 m/s (estimate) |
| MECHANICAL PROPERTIES |
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| Ultimate Tensile Strength | 172 to 476 MPa |
| Proof Stress (0.2%) | 70 to 395 MPa |
| Elongation | 7 to 20 % |
| ELECTRICAL PROPERTIES |
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| Electrical Volume Resistivity | 3.9e-8 to 6.2e-8 ohm.m |
| THERMAL PROPERTIES |
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| Temperature Range | 217 °C(maximum) |
| Thermal Conductivity | 116 to 170 W/m.K |
| Thermal Expansion Coefficient | 22.3 µstrain/°C |
| Melting Range | 543 to 643 °C |
| RELEVANT PROPERTIES FOR USE IN SPACE COMMUNITY |
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| General Corrosion Status | Requires specific corrosion protection |
| Atmospheric Corrosion | Relatively poor resistance to corrosion. Protective finish always required |
| Stress Corrosion Status | High Resistance to SCC: Table 1 Remark: Resistant (refer to ECSS-Q-ST-70-36C). Tempers: T6 and T8 are considered to be Table 1 alloys Data Quality: Design Data |
| Bimetallic Corrosion | Can be used in a non-controlled environment with: Al+alloys, Cd, Sn-Pb alloys, Sn, Pb
Can be used in a clean room environment with: as above and Mg, Ni, Monel, Inconel, Ni-Mo alloys, 300 series SS, 400 series SS, Ti and Ti alloys, Zn, Be Needs specific measures: All others Remark: ECSS-Q-ST-70C Rev.1 table 5.1 Data Quality: Design Data |
| FLUID SYSTEMS COMPATIBILITY |
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| Gaseous Oxygen (GOX) | Untested |
| Liquid Oxygen (LOX) | Untested |
| Nitrogen Tetroxide (N2O4) | SCC susceptibility is low and no fluid decomposition |
| Hydrazine (HDZE) | SCC susceptibility is low and no fluid decomposition |
| SPECIAL RECOMMENDATIONS |
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| Special Recommendations | Solution treatment temperatures should be closely controlled as higher temperatures may cause solid solution grain boundary melting or eutectic melting which cannot be repaired by subsequent heat treatment.
The alloy can be satisfactorily welded by fusion and resistance welding techniques. Reheat-treatment of clad material should be done carefully because copper tends to diffuse through the cladding layer to the surface, decreasing corrosion resistance. |
| Lessons Learned | In some cases this alloy responds poorly to black anodising, due to the high copper content |