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R30012 Cobalt vs. Grade VDSiCrV Steel

R30012 cobalt belongs to the cobalt alloys classification, while grade VDSiCrV steel belongs to the iron alloys. There are 22 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is R30012 cobalt and the bottom bar is grade VDSiCrV steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
190
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 86
80
Tensile Strength: Ultimate (UTS), MPa 830
2100

Thermal Properties

Latent Heat of Fusion, J/g 320
270
Melting Completion (Liquidus), °C 1470
1440
Melting Onset (Solidus), °C 1280
1400
Specific Heat Capacity, J/kg-K 440
480
Thermal Conductivity, W/m-K 15
47
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.8
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 1.8
8.6

Otherwise Unclassified Properties

Density, g/cm3 8.8
7.7
Embodied Carbon, kg CO2/kg material 8.3
1.9
Embodied Energy, MJ/kg 120
26
Embodied Water, L/kg 480
50

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 26
75
Strength to Weight: Bending, points 22
47
Thermal Diffusivity, mm2/s 3.8
13
Thermal Shock Resistance, points 23
63

Alloy Composition

Carbon (C), % 1.4 to 2.0
0.5 to 0.7
Chromium (Cr), % 27 to 32
0.5 to 1.0
Cobalt (Co), % 47.5 to 64.1
0
Copper (Cu), % 0
0 to 0.060
Iron (Fe), % 0 to 3.0
96.1 to 97.8
Manganese (Mn), % 0
0.4 to 0.9
Molybdenum (Mo), % 0 to 1.0
0
Nickel (Ni), % 0 to 3.0
0
Phosphorus (P), % 0
0 to 0.020
Silicon (Si), % 0 to 2.0
1.2 to 1.7
Sulfur (S), % 0
0 to 0.020
Tungsten (W), % 7.5 to 9.5
0
Vanadium (V), % 0
0.1 to 0.25