Technetium, Tc; Annealed
Categories: Metal; Nonferrous Metal; Pure Element

Material Notes: Annealed applies only to tensile and/or hardness values; other property values are typical of the element. Property values for Tc-99. Annealed 10 min at 950°C (1740°F)

See also As-Rolled Tc.

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Physical PropertiesMetricEnglishComments
Density 11.5 g/cc0.415 lb/in³
Chemical PropertiesMetricEnglishComments
Atomic Mass 9898Longest-Lived Isotope (1995)
Atomic Number 4343
X-ray Absorption Edge 0.58888 Å0.58888 ÅK
 4.06426 Å4.06426 ÅLI
 4.42714 Å4.42714 ÅLII
 4.62537 Å4.62537 ÅLIII
Electronegativity 2.12.1Pauling
Ionic Radius 0.979 Å0.979 ÅCrystal Ionic Radius for Valence +7
Mechanical PropertiesMetricEnglishComments
Elongation at Break 30 %30 %in 25 mm
Tensile Modulus 322 GPa46700 ksi
Tensile Strength, Ultimate 800 MPa116000 psi
Hardness, Brinell 112112
Hardness, Vickers 151151
Bulk Modulus 281 GPa40800 ksi
Poissons Ratio 0.310.31
Shear Modulus 123 GPa17800 ksi
Electrical PropertiesMetricEnglishComments
Electrical Resistivity 0.0000185 ohm-cm0.0000185 ohm-cm
Magnetic Susceptibility 0.00000270.0000027cgs/g
Critical Magnetic Field Strength, Oersted 14101410
Critical Superconducting Temperature 7.80 K7.80 K
Thermal PropertiesMetricEnglishComments
CTE, linear 7.05 µm/m-°C
@Temperature -120 - 25.0 °C
3.92 µin/in-°F
@Temperature -184 - 77.0 °F
Melting Point 2200 °C3990 °F
Thermal Conductivity 50.6 W/m-K351 BTU-in/hr-ft²-°FPolycrystalline Sample
Boiling Point 4265 °C7709 °F
Component Elements PropertiesMetricEnglishComments
Technetium, Tc 100 %100 %
Descriptive Properties
CAS Number7440-26-8

References for this datasheet.

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