Iron, Fe
Categories: Metal; Pure Element
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Physical PropertiesMetricEnglishComments
Density 7.87 g/cc0.284 lb/in³
 
Chemical PropertiesMetricEnglishComments
Atomic Mass 55.84555.8451995
Atomic Number 2626
Thermal Neutron Cross Section 2.53 barns/atom2.53 barns/atom
X-ray Absorption Edge 1.743 Å1.743 ÅK
 14.601 Å14.601 ÅLI
 17.169 Å17.169 ÅLII
 17.4838 Å17.4838 ÅLIII
Electrode Potential -0.0400 V-0.0400 V
Electronegativity 1.831.83Pauling
Ionic Radius 0.640 Å0.640 ÅCrystal Ionic Radius for Valence +3
 0.740 Å0.740 ÅCrystal Ionic Radius for Valence +2
Electrochemical Equivalent 0.695 g/A/h0.695 g/A/htrivalent
 1.042 g/A/h1.042 g/A/hdivalent
 
Mechanical PropertiesMetricEnglishComments
Hardness, Brinell 146146Converted from Vickers for 3000 kg load/10 mm ball Brinell test
Hardness, Rockwell A 4949Converted from Vickers
Hardness, Rockwell B 7979Converted from Vickers
Hardness, Vickers 150150
Tensile Strength at Break 540 MPa78300 psi
Tensile Strength, Yield 50.0 MPa
@Strain 0.5 %		7250 psi
@Strain 0.5 %		after zone refining
Modulus of Elasticity 200 GPa29000 ksi
Bulk Modulus 166 GPa24100 ksi
Poissons Ratio 0.2910.291
Shear Modulus 77.5 GPa11200 ksiCalculated
 
Electrical PropertiesMetricEnglishComments
Electrical Resistivity 0.00000890 ohm-cm0.00000890 ohm-cm
 
Thermal PropertiesMetricEnglishComments
Heat of Fusion 272 J/g117 BTU/lb
Heat of Vaporization 6615 J/g2846 BTU/lb
CTE, linear  12.2 µm/m-°C
@Temperature 20.0 - 100 °C		6.78 µin/in-°F
@Temperature 68.0 - 212 °F
 15.0 µm/m-°C
@Temperature 250 °C		8.33 µin/in-°F
@Temperature 482 °F
 16.0 µm/m-°C
@Temperature 500 °C		8.89 µin/in-°F
@Temperature 932 °F
 24.0 µm/m-°C
@Temperature 1000 °C		13.3 µin/in-°F
@Temperature 1830 °F		Gamma Phase
Specific Heat Capacity 0.440 J/g-°C0.105 BTU/lb-°F
Thermal Conductivity 76.2 W/m-K529 BTU-in/hr-ft²-°F
Melting Point 1535 °C2795 °F
Boiling Point 2861 °C5182 °F
 
Optical PropertiesMetricEnglishComments
Emissivity (0-1) 0.35
@Wavelength >=650 nm,
Temperature 927 °C		0.35
@Wavelength >=650 nm,
Temperature 1700 °F
Reflection Coefficient, Visible (0-1) 0.650.651500 nm
 
Component Elements PropertiesMetricEnglishComments
Iron, Fe 100 %100 %
 
Descriptive Properties
CAS Number7439-89-6

References for this datasheet.

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