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Grade VDSiCrV Steel vs. R30035 Cobalt

Grade VDSiCrV steel belongs to the iron alloys classification, while R30035 cobalt belongs to the cobalt alloys. There are 24 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is grade VDSiCrV steel and the bottom bar is R30035 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
220 to 230
Poisson's Ratio 0.29
0.29
Reduction in Area, % 48
40 to 74
Shear Modulus, GPa 80
84 to 89
Tensile Strength: Ultimate (UTS), MPa 2100
900 to 1900

Thermal Properties

Latent Heat of Fusion, J/g 270
320
Melting Completion (Liquidus), °C 1440
1440
Melting Onset (Solidus), °C 1400
1320
Specific Heat Capacity, J/kg-K 480
440
Thermal Conductivity, W/m-K 47
11
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 8.6
1.8

Otherwise Unclassified Properties

Base Metal Price, % relative 2.3
100
Density, g/cm3 7.7
8.7
Embodied Carbon, kg CO2/kg material 1.9
10
Embodied Energy, MJ/kg 26
140
Embodied Water, L/kg 50
410

Common Calculations

Stiffness to Weight: Axial, points 13
14 to 15
Stiffness to Weight: Bending, points 25
23 to 24
Strength to Weight: Axial, points 75
29 to 61
Strength to Weight: Bending, points 47
24 to 39
Thermal Diffusivity, mm2/s 13
3.0
Thermal Shock Resistance, points 63
23 to 46

Alloy Composition

Boron (B), % 0
0 to 0.015
Carbon (C), % 0.5 to 0.7
0 to 0.025
Chromium (Cr), % 0.5 to 1.0
19 to 21
Cobalt (Co), % 0
29.1 to 39
Copper (Cu), % 0 to 0.060
0
Iron (Fe), % 96.1 to 97.8
0 to 1.0
Manganese (Mn), % 0.4 to 0.9
0 to 0.15
Molybdenum (Mo), % 0
9.0 to 10.5
Nickel (Ni), % 0
33 to 37
Phosphorus (P), % 0 to 0.020
0 to 0.015
Silicon (Si), % 1.2 to 1.7
0 to 0.15
Sulfur (S), % 0 to 0.020
0 to 0.010
Titanium (Ti), % 0
0 to 1.0
Vanadium (V), % 0.1 to 0.25
0