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| PRODUCT DATA of AA7075-T6 |
| Material | AA7075-T6 |
| Product Datasheet | Alcoa 7075 plate and sheet
Alcoa alloy 7075 |
| General Information | The T6 condition has low fracture toughness at room temperarture and cryogenic temperatures |
| Processing and Assembly | Solution heat treated and then artificially aged. Mechanical property limits not affected by cold working |
| Chemical Composition | 5.6% Zn, 2.5% Mg, 1.6% Cu, 0.3% Cr, Rem. Al |
| Name of Manufacturer | Corus |
| EXPERIENCE IN PRACTICE |
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| Development Status | Commercial Product |
| Cost Range | Very Low |
| Equivalent Designations | DTD 5074A, AFNOR A-Z5GU, Werk No. 3.4364, AA 7075, AA7075 |
| Space Experience | Good |
| PHYSICAL PROPERTIES |
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| Crystal Structure | Face centered cubic (fcc) |
| Specific Gravity | 2.8 Remark:@RT |
| Magnetic Properties | Nonmagnetic |
| MECHANICAL PROPERTIES |
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| Ultimate Tensile Strength | 483 to 558 MPa Remark: Room Temperature. Exact value depends on test direction Data Quality: Limited Laboratory testing |
| Proof Stress (0.2%) | 427 to 503 MPa Remark: Room Temperature. Exact value depends on test direction Data Quality: Limited Laboratory testing |
| Elongation | 3 to 8 % Remark: Room Temperature. Exact value depends on test direction Data Quality: Limited Laboratory testing |
| ELECTRICAL PROPERTIES |
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| Electrical Volume Resistivity | 8.9e-8 ohm.m Remark:@ Room Temperature |
| THERMAL PROPERTIES |
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| Temperature Range | 121 °C(maximum) |
| Thermal Conductivity | 134 W/m.K Remark: @ Room temperature |
| Thermal Expansion Coefficient | 22 μstrain/°C Remark: @ Room temperature |
| Specific Heat | 0.837 J/g.K Remark: @ Room temperature |
| RELEVANT PROPERTIES FOR USE IN SPACE COMMUNITY |
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| General Corrosion Status | Requires specific corrosion protection |
| Atmospheric Corrosion | Poor resistance to atmospheric corrosion and should always be protected. Although anodising is possible, the degree of protection it affords is not as great as with other Aluminium alloys, so painting is the recommended treatment. |
| Stress Corrosion Status | Low Resistance to SCC: Table 3
Remark: Not suitable for structural applications. For high stress applications see ECSS-Q-ST-70-36C Data Quality: Design Data |
| EMF vs SCE | -0.74 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 |
| 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) | Untested |
| 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 |