Columbium


Application & Characteristics
Used in nuclear reactors and in high-temperature heat exchangers. Retains much of its strength at temperatures to 2000F.

Chemical Composition (%)
Cb

Physical Properties
Melting Range (°F)	4474
Density (lbs/in³) 68F	0.31
Thermal Expansion (in/in °Fx10 to the power of -6)	13.82 (70F)
Electrical Resistivity (ohms/cir mil/ft.) 68F	79

Mechanical Properties – Temper = A
Tensile Strength (psi x 10³)	40
Yield Strength (psi x 10³)	35
Elongation ( % )	30
Hardness	55 (VHN)

Mechanical Properties – Temper = H
Tensile Strength (psi x 10³)	80
Yield Strength (psi x 10³)	70
Elongation ( % )	5
Hardness	120 (VHN)