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PRODUCT DATA of Chromium
MaterialChromium
Chemical Composition100Cr
CAS Registry ID7440-47-3
EXPERIENCE IN PRACTICE
Development StatusCommercial Product
Cost RangeMedium
Equivalent DesignationsCr
Space ExperienceVery Good
PHYSICAL PROPERTIES
Atomic Number24
Atomic Weight52 amu
Work Function4.4 eV
Crystal StructureBody centered cubic (bcc)
Specific Gravity7.2
ELASTIC PROPERTIES
Tensile Modulus290 GPa
Shear Modulus115 GPa
Bulk Modulus160 GPa
Poisson Ratio0.21
Speed of Sound (longitudinal)5940 m/s
ELECTRICAL PROPERTIES
Electrical Volume Resistivity1.32e-7 ohm.m
THERMAL PROPERTIES
Thermal Conductivity85 W/m.K
Melting Range1860 °C
RELEVANT PROPERTIES FOR USE IN SPACE COMMUNITY
Atmospheric CorrosionThe oxidation film is adherent up to about 900-950C. After oxidation at higher temperature the oxide film flakes off on cooling
EMF vs SCE-0.31 V
Remark: Measured in 3.5% NaCl solution
Data Quality: Design Data