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| PRODUCT DATA of AA7175-T76 |
| Material | AA7175-T76 |
| General Information | 7175 is a high strength, heat treatable, forging alloy. It has an excellent combination of toughness and strength, similar to 7075 alloy except that the 7175 version has
superior toughness and tensile strength.
T76 is now called T74 |
| Chemical Composition | Al-5.6Zn-2.5Mg-1.6Cu-0.23Cr |
| EXPERIENCE IN PRACTICE |
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| Development Status | Commercial Product |
| Equivalent Designations | AA 7175 |
| Space Experience | Good |
| RELEVANT PROPERTIES FOR USE IN SPACE COMMUNITY |
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| General Corrosion Status | Requires specific corrosion protection |
| Stress Corrosion Status | Moderate Resistance to SCC: Table 2 Remark: Requires Stress corrosion evaluation form Data Quality: Design Data |
| 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 where the Zn content is at the high end of the composition range, this alloy responds poorly to black anodising. |