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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 PropertiesMetricEnglishComments
Density 9.03 g/cc0.326 lb/in³
 
Mechanical PropertiesMetricEnglishComments
Hardness, Brinell 155155Estimated from Knoop
Hardness, Knoop 180180Annealed 1 hour/1370°C
Hardness, Rockwell A 5050Estimated from Knoop
Hardness, Rockwell B 8282Estimated from Knoop
Hardness, Vickers 157157Estimated from Knoop
Tensile Strength, Ultimate 540 MPa78300 psiAnnealed Sheet
Tensile Strength, Yield 400 MPa58000 psiAnnealed Sheet
Elongation at Break 20 %20 %in 5 cm; Annealed Sheet
Tensile Modulus 110 GPa16000 ksi
Compressive Yield Strength 351 MPa50900 psi
Ultimate Bearing Strength 703 MPa102000 psi
Bearing Yield Strength 625 MPa90600 psi
Fatigue Strength 275 MPa
@# of Cycles 1.00e+6
39900 psi
@# of Cycles 1.00e+6
notch status not known.
Machinability 80 %80 %C36000 Brass as 100%
Shear Strength 425 MPa61600 psi
 
Thermal PropertiesMetricEnglishComments
CTE, linear 7.40 µm/m-°C
@Temperature 20.0 - 1205 °C
4.11 µin/in-°F
@Temperature 68.0 - 2201 °F
Specific Heat Capacity 0.281 J/g-°C0.0672 BTU/lb-°F
Thermal Conductivity 48.7 W/m-K338 BTU-in/hr-ft²-°F
Melting Point <= 2425 °C<= 4397 °F
Liquidus 2425 °C4397 °F
 
Component Elements PropertiesMetricEnglishComments
Carbon, C <= 0.015 %<= 0.015 %
Hydrogen, H <= 0.0010 %<= 0.0010 %
Niobium, Nb (Columbium, Cb) 87.5 %87.5 %
Nitrogen, N <= 0.010 %<= 0.010 %
Oxygen, O <= 0.020 %<= 0.020 %
Tungsten, W 9.0 - 11 %9.0 - 11 %
Zirconium, Zr 2.0 - 3.0 %2.0 - 3.0 %

References for this datasheet.

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