An Introduction to Cobalt

Material: An Introduction to Cobalt
Composition: >99.3%Co - typical impurities: Ni Fe Cu
Property Minimum Value (S.I.) Maximum Value (S.I.) Units (S.I.) Minimum Value (Imp.) Maximum Value (Imp.) Units (Imp.)
Atomic Volume (average) 0.006 0.007 m3/kmol 366.142 427.166 in3/kmol
Density 8.8 8.9 Mg/m3 549.366 555.609 lb/ft3
Energy Content 110 340 MJ/kg 11917.3 36835.1 kcal/lb
Bulk Modulus 174 212 GPa 25.2365 30.748 106 psi
Compressive Strength 295 925 MPa 42.7861 134.16 ksi
Ductility 0.02 0.2 0.02 0.2 NULL
Elastic Limit 295 925 MPa 42.7861 134.16 ksi
Endurance Limit 270 625 MPa 39.1602 90.6485 ksi
Fracture Toughness 120 150 MPa.m1/2 109.206 136.507 ksi.in1/2
Hardness 1600 3700 MPa 232.061 536.64 ksi
Loss Coefficient 0.0002 0.0008 0.0002 0.0008 NULL
Modulus of Rupture 295 925 MPa 42.7861 134.16 ksi
Poisson's Ratio 0.31 0.33 0.31 0.33 NULL
Shear Modulus 74 84 GPa 10.7328 12.1832 106 psi
Tensile Strength 675 1250 MPa 97.9005 181.297 ksi
Young's Modulus 199 215 GPa 28.8625 31.1831 106 psi
Glass Temperature K °F
Latent Heat of Fusion 255 265 kJ/kg 109.63 113.929 BTU/lb
Maximum Service Temperature 530 650 K 494.33 710.33 °F
Melting Point 1750 1768 K 2690.33 2722.73 °F
Minimum Service Temperature 0 0 K -459.67 -459.67 °F
Specific Heat 420 460 J/kg.K 0.32502 0.355975 BTU/lb.F
Thermal Conductivity 92 100 W/m.K 172.227 187.203 BTU.ft/h.ft2.F
Thermal Expansion 11.5 14 10-6/K 20.7 25.2 10-6/°F
Breakdown Potential MV/m V/mil
Dielectric Constant NULL
Resistivity 5.5 8 10-8 ohm.m 5.5 8 10-8 ohm.m
Environmental Properties
  Resistance Factors
1=Poor 5=Excellent
Flammability 5
Fresh Water 5
Organic Solvents 5
Oxidation at 500C 5
Sea Water 5
Strong Acid 3
Strong Alkalis 4
UV 5
Wear 3
Weak Acid 4
Weak Alkalis 5