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
Hardness, Brinell 112112
Hardness, Vickers 151151
Tensile Strength, Ultimate 800 MPa116000 psi
Tensile Strength, Yield 320 MPa
@Strain 0.2 %		46400 psi
@Strain 0.2 %
Elongation at Break 30 %30 %in 25 mm
Tensile Modulus 322 GPa46700 ksi
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
Thermal Conductivity 50.6 W/m-K351 BTU-in/hr-ft²-°FPolycrystalline Sample
Melting Point 2200 °C3990 °F
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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