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Rulon Bearings

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Niobium C-129Y (80Nb-10W-10Hf-0.1Y)
Categories: Metal; Nonferrous Metal; Niobium Alloy; Refractory Metal

Key Words: Columbium Alloy
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Physical PropertiesOriginal ValueComments
Density 9.50 g/cc
 
Mechanical PropertiesOriginal ValueComments
Hardness, Brinell 209Estimated from Vickers
Hardness, Knoop 234Estimated from Vickers
Hardness, Rockwell B 95Estimated from Vickers
Hardness, Rockwell C 16Estimated from Vickers
Hardness, Vickers 220Recrystallized
Tensile Strength 26.0 ksi
@Temperature 1320 °C
Recrystallized
Tensile Strength, Ultimate 620 MPa
 180 MPa
@Temperature 1315 °C
Tensile Strength, Yield 515 MPa
Elongation at Break 25 %in 25 mm
Rupture Strength 15000 psi
@Temperature 1320 °C,
Time 36000 sec
Recrystallized
Tensile Modulus 112 GPa
Machinability 75 %C36000 Brass as 100%
 
Thermal PropertiesOriginal ValueComments
CTE, linear 6.88 µm/m-°C
@Temperature 20.0 - 1100 °C
Specific Heat Capacity 0.268 J/g-°C
Thermal Conductivity 69.6 W/m-K
Melting Point <= 2400 °C
Liquidus 2400 °C
 
Component Elements PropertiesOriginal ValueComments
Carbon, C <= 0.015 %
Hafnium, Hf 9.0 - 11 %
Hydrogen, H <= 0.0015 %
Niobium, Nb (Columbium, Cb) 80 %
Nitrogen, N <= 0.015 %
Oxygen, O <= 0.025 %
Tantalum, Ta <= 0.50 %
Tungsten, W 9.0 - 11 %
Yttrium, Y 0.050 - 0.30 %
Zirconium, Zr <= 0.50 %

References for this datasheet.

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