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H.C. Starck Grain Stabilized Niobium (GSNb)
Categories: Metal; Nonferrous Metal; Refractory Metal
Material Notes: GSNb is a patent pending single-phase micro-alloy that has a grain size of approximately 2 ASTM numbers finer than standard commercial grade niobium.

Applications: Grain Stabilized Niobium (GSNb) is primarily used for its superior fine grain size while retaining the properties of commercial grade niobium. this allows for reduced "orange peel" during drawing and forming applications, and other applications where a fine grain size is required. It is used extensively in the industrial diamond market. GSNb's corrosion resistance is equal to commercial grade niobium and finds use in the chemical process industry. GSNb can also be used in sputtering targets for fiber optic applications or architectural glass. 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.

Mechanical Properties of GSNb: GSNb meets the mechanical properties requirements of ASTM B393 Type 2 Commercial Grade Niobium (UNS R04210).

Corrosion Resistance: The corrosion resistance of GSNb is identical to that of commercial grade niobium and can be used in all applications where commercial grade niobium is used. Like tantalum, GSNb is resistant to most acids with the exception of hydrofluoric, however it is not as resistant as tantalum to strong acids at high temperature. It should not be used with strong bases (alkalis).

Information provided by H.C. Starck.
Vendors: Visit metalmen for your metals needs. Products include special chemistry, tight tolerances, custom tempers, odd dimensions/forms, and small quantities. Phone 1-800-767-9494.

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Physical PropertiesMetricEnglishComments
Density 8.58 g/cc0.310 lb/in³
 
Chemical PropertiesMetricEnglishComments
Atomic Mass 92.9192.91
Atomic Number 4141
 
Mechanical PropertiesMetricEnglishComments
Hardness, Vickers 60 - 10060 - 100
Tensile Strength >= 124 MPa>= 18000 psi
Tensile Strength, Yield >= 72.4 MPa>= 10500 psi
Elongation at Break  15 %
@Thickness 0.0508 - 0.0991 mm		15 %
@Thickness 0.00200 - 0.00390 in
 20 %
@Thickness >=0.102 mm		20 %
@Thickness >=0.00400 in
 
Electrical PropertiesMetricEnglishComments
Volume Resistivity 0.0000145 ohm-cm
@Temperature 0.000 - 100 °C		0.0000145 ohm-cm
@Temperature 32.0 - 212 °F
 
Thermal PropertiesMetricEnglishComments
CTE, linear 12.8 µm/m-°C
@Temperature 20.0 - 100 °C		7.10 µin/in-°F
@Temperature 68.0 - 212 °F
Specific Heat Capacity 0.272 J/g-°C
@Temperature 27.0 °C		0.0650 BTU/lb-°F
@Temperature 80.6 °F
Thermal Conductivity 52.3 W/m-K363 BTU-in/hr-ft²-°F
Melting Point 2468 °C4474 °F
 
Component Elements PropertiesMetricEnglishComments
Carbon, C <= 0.010 %<= 0.010 %
Hafnium, Hf <= 0.020 %<= 0.020 %
Hydrogen, H <= 0.0015 %<= 0.0015 %
Iron, Fe <= 0.010 %<= 0.010 %
Molybdenum, Mo <= 0.020 %<= 0.020 %
Nickel, Ni <= 0.0050 %<= 0.0050 %
Niobium, Nb (Columbium, Cb) >= 99.50 %>= 99.50 %Balance
Nitrogen, N <= 0.010 %<= 0.010 %
Other, each <= 0.0050 %<= 0.0050 %
Oxygen, O <= 0.015 %<= 0.015 %
Silicon, Si <= 0.010 %<= 0.010 %
Tantalum, Ta <= 0.30 %<= 0.30 %
Titanium, Ti <= 0.030 %<= 0.030 %
Tungsten, W <= 0.050 %<= 0.050 %
Zirconium, Zr <= 0.020 %<= 0.020 %
 
Descriptive Properties
Grain Size (ASTM)6 or finerfor thickness < 0.010"
Olsen Cup Test0.240"Foil thickness 0.005 to 0.01"

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 view all the property values for this datasheet as they were originally entered into MatWeb.

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NHCST936 / 130826

Specialty Compounds RTP Company




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