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| PRODUCT DATA of Electron 21 |
| Material | Electron 21 |
| General Information | High strength heat treatable casting alloy for temperatures up to 200C |
| Product Type | rod |
| Chemical Composition | Mg - 0.25Zn - 2.74Nd - 1.42Gd - 0.52Zr - <0.01Cu - 0.0028Fe - <0.01Ag - <0.4others |
| Name of Manufacturer | Magnesium Elektron
PO Box 23, Swinton, Manchester M27 8DD, UK + 44 (0)161 911 1000 + 44 (0)161 911 1010 www.magnesium-elektron.com |
| EXPERIENCE IN PRACTICE |
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| Development Status | Commercial Product |
| Space Experience | Poor |
| PHYSICAL PROPERTIES |
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| Specific Gravity | 1.82 Data Quality: Manufacturer's data |
| ELASTIC PROPERTIES |
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| Tensile Modulus | 40.9 to 45.5 GPa Remark:test report Data Quality: Design Data |
| ELECTRICAL PROPERTIES |
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| Electrical Volume Resistivity | 9.46e-8 ohm.m Data Quality: Manufacturer's data |
| THERMAL PROPERTIES |
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| Thermal Conductivity | 116 W/m.K Data Quality: Manufacturer's data |
| Thermal Expansion Coefficient | 25.3 μstrain/°C Data Quality: Manufacturer's data |
| Melting Range | 545 to 640 °C Data Quality: Manufacturer's data |
| RELEVANT PROPERTIES FOR USE IN SPACE COMMUNITY |
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| General Corrosion Status | Requires specific corrosion protection |
| Stress Corrosion Status | High Resistance to SCC: Table 1
Remark:High resistance in T6 condition in the ST direction Remark: acc. to ECSS-Q-ST-70-36C Data Quality: Design Data |
| EMF vs SCE | -1.55 V Remark: Measured in 3.5% NaCl solution Data Quality: Design Data |
| Bimetallic Corrosion | Can be connected in a clean room environment to: Sn-Pb alloys, Sn, Pb Needs specific measures: All others Data Quality: Design Data |