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Master Bond adhesives

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Elmet-Starck Pure Niobium (Columbium)
Categories: Metal; Nonferrous Metal; Niobium Alloy; Refractory Metal; Pure Element

Material Notes: Applications: NRC® niobium metal is produced from electron beam melted ingots. Grain Stabilized Niobium (GSNb) is made by EB and VAR melting. Both materials are malleable, weldable, machineable and formable. GSNb is used in applications where a consistently finer grain size is required.
Niobium is used in the manufacture of synthetic diamonds; in sputtering targets for fiber optic applications or architectural glass; in nickel based superalloys; and alloyed with titanium or tin, in superconductors. In nuclear reactors it has low thermal neutron cross section and superior corrosion resistance, It is an excellent getter and finds use in high temperature vacuum furnaces, and is resistant to attack by the molten alkali metals found in sodium vapor lamps.

Forms Available: Foil, Sheet, Plate, Welded Tubing, Rod, Wire and Bar.

Metallurgical Characteristics: Material is single-phase niobium, stress relieve at 650°C, re-crystallize at 950°C. Crystal structure: bcc

Information provided by H.C. Starck.

Elmet Technologies Acquired H.C. Starck Solutions Americas in 2023.

Vendors: Elmet Technologies is a 100% US owned and operated, fully integrated manufacturer of Molybdenum, Tungsten and related alloys such as TZM, WHA & MoLa. At our 220,000 sqr/ft plant in Lewiston, Maine, Elmet manufactures W & Mo pure powders plus rod, wire, plate, sheet & foil in additional to offering fabrication and machining services. ITAR, ISO and AS9100 registered. www.elmettechnologies.com

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Physical PropertiesOriginal ValueComments
Specific Gravity 8.47 g/cc
 
Chemical PropertiesOriginal ValueComments
Atomic Mass 92.91
Atomic Number 41
Thermal Neutron Cross Section 1.1 barns/atom
 
Mechanical PropertiesOriginal ValueComments
Hardness, Vickers 50 - 80annealed
Tensile Strength, Ultimate >= 16.2 ksire-crystallized
 >= 18.0 ksi
@Temperature 20.0 °C
Tensile Strength, Yield >= 12.3 ksi
@Temperature 20.0 °C
typical
Elongation at Break >= 25 %
Modulus of Elasticity 15000 ksi
Poissons Ratio 0.38
Shear Modulus 37.3 GPaCalculated
 
Electrical PropertiesOriginal ValueComments
Volume Resistivity 0.0000145 ohm-cm
@Temperature 0.000 - 100 °C
Critical Superconducting Temperature 9.20 K
 
Thermal PropertiesOriginal ValueComments
CTE, linear 7.10 µin/in-°F
@Temperature 20.0 - 100 °C
Specific Heat Capacity 0.0650 BTU/lb-°F
@Temperature 27.0 °C
Thermal Conductivity 363 BTU-in/hr-ft²-°F
Melting Point 2468 °C
 
Component Elements PropertiesOriginal ValueComments
Niobium, Nb (Columbium, Cb) >= 99.8 %Type II - Commercial Grade
 >= 99.9 %Type I - Reactor Grade
Tantalum, Ta <= 0.10 %Type I - Reactor Grade
 <= 0.20 %Type II - Commercial Grade
 
Descriptive Properties
Thermal Resistivity1

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to go back to viewing the property data in MatWeb's normal format.

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