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PRODUCT DATA of Niobium
MaterialNiobium
Chemical Composition100Nb
Name of Manufacturer7440-03-1
EXPERIENCE IN PRACTICE
Development StatusCommercial Product
Equivalent DesignationsNb
Space ExperiencePoor
PHYSICAL PROPERTIES
Atomic Number41
Atomic Weight92.9 amu
Work Function4.3 eV
Crystal StructureBody centered cubic (bcc)
Surface Energy2640 to 2860 mJ/m^2
Specific Gravity8.6
ELASTIC PROPERTIES
Tensile Modulus105 GPa
Shear Modulus38 GPa
Bulk Modulus170 GPa
Poisson Ratio0.4
Speed of Sound (longitudinal)4920 m/s
Speed of Sound (transverse)2100 m/s
Acoustic Impedance42.4 MRayls
ELECTRICAL PROPERTIES
Electrical Volume Resistivity1.6e-7 ohm.m
Superconductivity Critical Temperature-264 °C
THERMAL PROPERTIES
Thermal Conductivity54.1 W/m.K
Thermal Expansion Coefficient7.2 μstrain/°C
Melting Range2470 °C
Specific Heat0.268 J/g.K
RELEVANT PROPERTIES FOR USE IN SPACE COMMUNITY
EMF vs SCE-0.3 V
Remark: Measured in 3.5% NaCl solution
Data Quality: Design Data