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H.C. Starck Grain Stabilized Niobium (GSNb)

Category Metal , Nonferrous Metal , Refractory Metal
Manufacturer H.C. Starck
Trade Name
Port Ningbo port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF H.C. Starck Grain Stabilized Niobium (GSNb).pdf
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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.
Physical Properties Metric English Comments
Density 8.58 g/cc
0.310 lb/in³
Mechanical Properties Metric English Comments
Hardness, Vickers 60 - 100
60 - 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
Thermal Properties Metric English Comments
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-K
363 BTU-in/hr-ft²-°F
Melting Point 2468 °C
4474 °F
Component Elements Properties Metric English Comments
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 %
Electrical Properties Metric English Comments
Volume Resistivity 0.0000145 ohm-cm

@Temperature 0.000 - 100 °C
 0.0000145 ohm-cm

@Temperature 32.0 - 212 °F
Chemical Properties Metric English Comments
Atomic Mass 92.91
92.91
Atomic Number 41
41
Descriptive Properties Value Comments
Grain Size (ASTM) 6 or finer
for thickness < 0.010"
Olsen Cup Test 0.240"
Foil thickness 0.005 to 0.01"
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