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| PRODUCT DATA of AA7050-T7651 |
| Material | AA7050-T7651 |
| General Information | Aluminium-Zinc-Copper-magnesium Alloy which has a good combination of strength, fracture toughness and corrosion resistance |
| Processing and Assembly | Solution heat treated, stress relieved by stretching a controlled amount (permanent set 1.5 to 3% for sheet and plate, 1 to 3% for rolled or cold finished rod and bar, 1 to 5% for hand or ring forging and rolled ring) and then artificially overaged in order to achieve a good exfolation corrosion resistance. The products recieve no further straightening after stretching |
| Product Type | Wrought Al alloy Plate and extrusions |
| Chemical Composition | Al-6.2Zn-2.25Mg-2.3Cu-0.12Zr |
| Name of Manufacturer | Corus Aluminium Wallzproducte GmbH |
| EXPERIENCE IN PRACTICE |
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| Development Status | Commercial Product |
| Equivalent Designations | AA 7050, UNS A97050 |
| PHYSICAL PROPERTIES |
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| Crystal Structure | Face centered cubic (fcc) |
| Magnetic Properties | Nonmagnetic |
| MECHANICAL PROPERTIES |
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| Ultimate Tensile Strength | 480 to 486 MPa |
| Proof Stress (0.2%) | 423 to 428 MPa |
| Elongation | 2.6 to 3.1 % |
| THERMAL PROPERTIES |
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| Melting Range | 488 to 629 °C |
| RELEVANT PROPERTIES FOR USE IN SPACE COMMUNITY |
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| General Corrosion Status | Requires specific corrosion protection |
| Stress Corrosion Status | Unknown Remark: Tested once. Moderate resistance in the T7651 condition in the ST direction: Class 2 Requires Stress corrosion evaluation form |
| 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 |
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| Lessons Learned | In some cases, this alloy responds poorly to black anodising |