Hafnium (Hf) - Properties and Applications

Material: Hafnium (Hf) - Properties and Applications
Composition: >97%Hf
Property Minimum Value (S.I.) Maximum Value (S.I.) Units (S.I.) Minimum Value (Imp.) Maximum Value (Imp.) Units (Imp.)
Atomic Volume (average) 0.013 0.014 m3/kmol 793.308 854.332 in3/kmol
Density 13.1 13.3 Mg/m3 817.807 830.292 lb/ft3
Energy Content 200 600 MJ/kg 21667.7 65003.2 kcal/lb
Bulk Modulus 92 104 GPa 13.3435 15.0839 106 psi
Compressive Strength 150 365 MPa 21.7557 52.9388 ksi
Ductility 0.2 0.45 0.2 0.45 NULL
Elastic Limit 150 365 MPa 21.7557 52.9388 ksi
Endurance Limit 160 375 MPa 23.206 54.3891 ksi
Fracture Toughness 120 150 MPa.m1/2 109.206 136.507 ksi.in1/2
Hardness 1550 1950 MPa 224.809 282.824 ksi
Loss Coefficient 0.0004 0.002 0.0004 0.002 NULL
Modulus of Rupture 150 365 MPa 21.7557 52.9388 ksi
Poisson's Ratio 0.255 0.265 0.255 0.265 NULL
Shear Modulus 54 58 GPa 7.83204 8.41219 106 psi
Tensile Strength 400 745 MPa 58.0151 108.053 ksi
Young's Modulus 138 144 GPa 20.0152 20.8854 106 psi
Glass Temperature K °F
Latent Heat of Fusion 120 145 kJ/kg 51.5905 62.3385 BTU/lb
Maximum Service Temperature 750 920 K 890.33 1196.33 °F
Melting Point 2490 2503 K 4022.33 4045.73 °F
Minimum Service Temperature 0 0 K -459.67 -459.67 °F
Specific Heat 140 150 J/kg.K 0.10834 0.116079 BTU/lb.F
Thermal Conductivity 22 23 W/m.K 41.1847 43.0568 BTU.ft/h.ft2.F
Thermal Expansion 5.5 6.5 10-6/K 9.9 11.7 10-6/°F
Breakdown Potential MV/m V/mil
Dielectric Constant NULL
Resistivity 32 40 10-8 ohm.m 32 40 10-8 ohm.m
Environmental Properties
  Resistance Factors
1=Poor 5=Excellent
Flammability 4
Fresh Water 5
Organic Solvents 5
Oxidation at 500C 4
Sea Water 5
Strong Acid 4
Strong Alkalis 5
UV 5
Wear 3
Weak Acid 5
Weak Alkalis 5

This data is provided subject to AZoM.com's terms and conditions. Data reproduced with permission of Granta Design Limited www.grantadesign.com

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