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Rulon Bearings

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Niobium Cb-752 (Nb-10W-2.5Zr)
Categories: Metal; Nonferrous Metal; Niobium Alloy; Refractory Metal

Key Words: Columbium Alloy
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Physical PropertiesOriginal ValueComments
Density 9.03 g/cc
 
Mechanical PropertiesOriginal ValueComments
Hardness, Brinell 155Estimated from Knoop
Hardness, Knoop 180Annealed 1 hour/1370°C
Hardness, Rockwell A 50Estimated from Knoop
Hardness, Rockwell B 82Estimated from Knoop
Hardness, Vickers 157Estimated from Knoop
Tensile Strength, Ultimate 540 MPaAnnealed Sheet
Tensile Strength, Yield 400 MPaAnnealed Sheet
Elongation at Break 20 %in 5 cm; Annealed Sheet
Tensile Modulus 110 GPa
Compressive Yield Strength 351 MPa
Ultimate Bearing Strength 703 MPa
Bearing Yield Strength 625 MPa
Fatigue Strength 275 MPa
@# of Cycles 1.00e+6
notch status not known.
Machinability 80 %C36000 Brass as 100%
Shear Strength 425 MPa
 
Thermal PropertiesOriginal ValueComments
CTE, linear 7.40 µm/m-°C
@Temperature 20.0 - 1205 °C
Specific Heat Capacity 0.281 J/g-°C
Thermal Conductivity 48.7 W/m-K
Melting Point <= 2425 °C
Liquidus 2425 °C
 
Component Elements PropertiesOriginal ValueComments
Carbon, C <= 0.015 %
Hydrogen, H <= 0.0010 %
Niobium, Nb (Columbium, Cb) 87.5 %
Nitrogen, N <= 0.010 %
Oxygen, O <= 0.020 %
Tungsten, W 9.0 - 11 %
Zirconium, Zr 2.0 - 3.0 %

References for this datasheet.

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