| All data is for information only------(Home) | |
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| PRODUCT DATA of Molybdenum |
| Material | Molybdenum |
| Chemical Composition | 100Mo |
| CAS Registry ID | 7439-98-7 |
| EXPERIENCE IN PRACTICE |
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| Development Status | Special Commercial Product |
| Equivalent Designations | Mo |
| Space Experience | Good |
| PHYSICAL PROPERTIES |
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| Atomic Number | 42 |
| Atomic Weight | 95.9 amu |
| Work Function | 5 eV |
| Crystal Structure | Body centered cubic (bcc) |
| Surface Energy | 3140 mJ/m^2 |
| Specific Gravity | 10.2 |
| ELASTIC PROPERTIES |
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| Tensile Modulus | 324 GPa |
| Bulk Modulus | 230 GPa |
| Poisson Ratio | 0.31 |
| Speed of Sound (longitudinal) | 6300 m/s |
| Speed of Sound (transverse) | 3400 m/s |
| Acoustic Impedance | 64.2 MRayls |
| ELECTRICAL PROPERTIES |
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| Electrical Volume Resistivity | 5.7e-8 ohm.m |
| Superconductivity Critical Temperature | -272 °C |
| THERMAL PROPERTIES |
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| Thermal Conductivity | 138 W/m.K |
| Thermal Expansion Coefficient | 5.1 μstrain/°C |
| Specific Heat | 0.251 J/g.K |
| Melting Range | 2610 °C |
| RELEVANT PROPERTIES FOR USE IN SPACE COMMUNITY |
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| Corrosion/Thermal | Above 500C at atmopheric air pressure , the outer oxide layer MoO3 begins to volatilise, and about 770C the rate of evaporation equals the rate of oxidation. The rate is linear Above 815C (melting point of the oxide) the oxidation is catastropic. |
| EMF vs SCE | -0.12 V Remark: Measured in 3.5% NaCl solution Data Quality: Design Data |
| Sublimation | 10-4mm/year at 1380°C 10-2mm/year at 1630°C 1 mm/year at 1900°C |