Cobalt - Based Carbide - Hardened Alloys - Nature and Properties

Material: Cobalt - Based Carbide - Hardened Alloys - Nature and Properties
Composition: 45-65Co/20-30Cr + other elements e.g. Fe Mn Nb Ni Ta W
Property Minimum Value (S.I.) Maximum Value (S.I.) Units (S.I.) Minimum Value (Imp.) Maximum Value (Imp.) Units (Imp.)
Atomic Volume (average) 0.0065 0.0078 m3/kmol 396.654 475.985 in3/kmol
Density 8 9.25 Mg/m3 499.424 577.459 lb/ft3
Energy Content 80 295 MJ/kg 8667.09 31959.9 kcal/lb
Bulk Modulus 175 245 GPa 25.3816 35.5342 106 psi
Compressive Strength 280 760 MPa 40.6106 110.229 ksi
Ductility 0.01 0.11 0.01 0.11 NULL
Elastic Limit 280 760 MPa 40.6106 110.229 ksi
Endurance Limit 195 515 MPa 28.2823 74.6944 ksi
Fracture Toughness 120 150 MPa.m1/2 109.206 136.507 ksi.in1/2
Hardness 2300 4600 MPa 333.587 667.174 ksi
Loss Coefficient 0.0002 0.0008 0.0002 0.0008 NULL
Modulus of Rupture 280 760 MPa 40.6106 110.229 ksi
Poisson's Ratio 0.3 0.34 0.3 0.34 NULL
Shear Modulus 75 95 GPa 10.8778 13.7786 106 psi
Tensile Strength 495 1025 MPa 71.7937 148.664 ksi
Young's Modulus 210 235 GPa 30.4579 34.0839 106 psi
Glass Temperature K °F
Latent Heat of Fusion 240 275 kJ/kg 103.181 118.228 BTU/lb
Maximum Service Temperature 1110 1400 K 1538.33 2060.33 °F
Melting Point 1530 1683 K 2294.33 2569.73 °F
Minimum Service Temperature 0 0 K -459.67 -459.67 °F
Specific Heat 365 475 J/kg.K 0.282458 0.367583 BTU/lb.F
Thermal Conductivity 8 25.5 W/m.K 14.9763 47.7369 BTU.ft/h.ft2.F
Thermal Expansion 11.5 17.5 10-6/K 20.7 31.5 10-6/°F
Breakdown Potential MV/m V/mil
Dielectric Constant NULL
Resistivity 20 83 10-8 ohm.m 20 83 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 4
Strong Alkalis 5
UV 5
Wear 5
Weak Acid 5
Weak Alkalis 5