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Refractory Metals

Niobium, Nb; High Purity
Categories: Metal; Nonferrous Metal; Niobium Alloy; Refractory Metal; Pure Element

Material Notes: EB-melted, swaged, and recrystallized at 1100ºC

Vendors: PLANSEE SE: Whether it's high temperatures, aggressive chemicals or extreme mechanical loading: PLANSEE supplies a suitable product solution in refractory metals or composite materials. As the world market leader in powder metallurgically produced high performance materials we combine outstanding materials knowledge with profound applications and technology know-how. Visit us at www.plansee.com.

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Physical PropertiesMetricEnglishComments
Density 8.57 g/cc0.310 lb/in³
a Lattice Constant 3.294 Å3.294 Å
Vapor Pressure  5.00e-11 bar
@Temperature 1800 °C
3.75e-8 torr
@Temperature 3270 °F
 4.00e-8 bar
@Temperature 2200 °C
0.0000300 torr
@Temperature 3990 °F
 
Chemical PropertiesMetricEnglishComments
Atomic Mass 92.9192.91
Atomic Number 4141
Atomic Volume 1.8e-0291.8e-029m^3
 
Mechanical PropertiesMetricEnglishComments
Hardness, Vickers 6565
Tensile Strength, Ultimate 240 MPa34800 psi
Tensile Strength, Yield 170 MPa
@Strain 0.2 %
24700 psi
@Strain 0.2 %
Elongation at Break 50 %50 %
Modulus of Elasticity 103 GPa14900 ksi
 75.0 GPa
@Temperature 1200 °C
10900 ksi
@Temperature 2190 °F
 80.0 GPa
@Temperature 800 °C
11600 ksi
@Temperature 1470 °F
 90.0 GPa
@Temperature 400 °C
13100 ksi
@Temperature 752 °F
Poissons Ratio 0.350.35
Shear Modulus 38.1 GPa5530 ksiCalculated
 
Electrical PropertiesMetricEnglishComments
Electrical Resistivity 0.0000160 ohm-cm0.0000160 ohm-cm
 
Thermal PropertiesMetricEnglishComments
CTE, linear  7.00 µm/m-°C
@Temperature 20.0 °C
3.89 µin/in-°F
@Temperature 68.0 °F
 7.70 µm/m-°C
@Temperature 400 °C
4.28 µin/in-°F
@Temperature 752 °F
 8.40 µm/m-°C
@Temperature 800 °C
4.67 µin/in-°F
@Temperature 1470 °F
 9.20 µm/m-°C
@Temperature 1200 °C
5.11 µin/in-°F
@Temperature 2190 °F
Specific Heat Capacity 0.268 J/g-°C0.0641 BTU/lb-°F
 0.290 J/g-°C
@Temperature 400 °C
0.0693 BTU/lb-°F
@Temperature 752 °F
 0.310 J/g-°C
@Temperature 800 °C
0.0741 BTU/lb-°F
@Temperature 1470 °F
 0.340 J/g-°C
@Temperature 1200 °C
0.0813 BTU/lb-°F
@Temperature 2190 °F
Thermal Conductivity 54.1 W/m-K375 BTU-in/hr-ft²-°F
 50.0 W/m-K
@Temperature 20.0 °C
347 BTU-in/hr-ft²-°F
@Temperature 68.0 °F
 58.0 W/m-K
@Temperature 400 °C
403 BTU-in/hr-ft²-°F
@Temperature 752 °F
 62.0 W/m-K
@Temperature 600 °C
430 BTU-in/hr-ft²-°F
@Temperature 1110 °F
 64.0 W/m-K
@Temperature 800 °C
444 BTU-in/hr-ft²-°F
@Temperature 1470 °F
Melting Point 2467 °C4473 °F
Boiling Point 4900 °C8850 °F
 
Component Elements PropertiesMetricEnglishComments
Niobium, Nb (Columbium, Cb) 99.97 %99.97 %

References for this datasheet.

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