Molybdenum (Mo pure >99.94%) vs Niobium (Nb pure >99.9%)
Property comparison of Molybdenum (Mo pure >99.94%) and Niobium (Nb pure >99.9%), both refractory.
| Property | Molybdenum (Mo pure >99.94%) | Niobium (Nb pure >99.9%) | Difference |
|---|---|---|---|
| Elastic modulus | 329,000 MPa | 105,000 MPa | -68% |
| Shear modulus | 127,000 MPa | 38,000 MPa | -70% |
| Poisson ratio | 0.29 | 0.4 | +38% |
| Density | 10,220 kg/m³ | 8,570 kg/m³ | -16% |
| Brinell hardness | 160 HB | 75 HB | -53% |
| Thermal conductivity | 138 W/m·K | 54 W/m·K | -61% |
| Specific heat | 251 J/kg·K | 265 J/kg·K | +6% |
| Coefficient of thermal expansion | 0.000005 1/K | 0.000007 1/K | +43% |
| Melting point | 2,623 °C | 2,477 °C | -6% |
Difference is Niobium (Nb pure >99.9%) relative to Molybdenum (Mo pure >99.94%). Values are taken from the representative row of each material; both materials may have multiple heat treatments or conditions on their individual pages.
Identification
- grade
- Mo pure
- standard
- ASTM
- heat treatment
- Stress-Relieved
- grade
- R04200
- standard
- CRC Handbook of Chemistry and Physics 103rd Ed. / ASTM B392
- heat treatment
- annealed
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