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AWS ERNiCrMo-2 vs. R30012 Cobalt

AWS ERNiCrMo-2 belongs to the nickel alloys classification, while R30012 cobalt belongs to the cobalt alloys. They have a modest 28% of their average alloy composition in common, which, by itself, doesn't mean much. There are 22 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is AWS ERNiCrMo-2 and the bottom bar is R30012 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
220
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 81
86
Tensile Strength: Ultimate (UTS), MPa 750
830

Thermal Properties

Latent Heat of Fusion, J/g 320
320
Melting Completion (Liquidus), °C 1460
1470
Melting Onset (Solidus), °C 1410
1280
Specific Heat Capacity, J/kg-K 450
440
Thermal Conductivity, W/m-K 11
15
Thermal Expansion, µm/m-K 13
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.5
1.8
Electrical Conductivity: Equal Weight (Specific), % IACS 1.6
1.8

Otherwise Unclassified Properties

Density, g/cm3 8.4
8.8
Embodied Carbon, kg CO2/kg material 9.2
8.3
Embodied Energy, MJ/kg 120
120
Embodied Water, L/kg 270
480

Common Calculations

Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 23
23
Strength to Weight: Axial, points 25
26
Strength to Weight: Bending, points 22
22
Thermal Diffusivity, mm2/s 2.9
3.8
Thermal Shock Resistance, points 20
23

Alloy Composition

Carbon (C), % 0.050 to 0.15
1.4 to 2.0
Chromium (Cr), % 20.5 to 23
27 to 32
Cobalt (Co), % 0.5 to 2.5
47.5 to 64.1
Copper (Cu), % 0 to 0.5
0
Iron (Fe), % 17 to 20
0 to 3.0
Manganese (Mn), % 0 to 1.0
0
Molybdenum (Mo), % 8.0 to 10
0 to 1.0
Nickel (Ni), % 40.3 to 53.8
0 to 3.0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0 to 2.0
Sulfur (S), % 0 to 0.030
0
Tungsten (W), % 0.2 to 1.0
7.5 to 9.5
Residuals, % 0 to 0.5
0