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AWS ERNiCrMo-2 vs. R31539 Cobalt

AWS ERNiCrMo-2 belongs to the nickel alloys classification, while R31539 cobalt belongs to the cobalt alloys. They have a modest 31% 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 R31539 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
220
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 81
86
Tensile Strength: Ultimate (UTS), MPa 750
1000 to 1340

Thermal Properties

Latent Heat of Fusion, J/g 320
320
Melting Completion (Liquidus), °C 1460
1360
Melting Onset (Solidus), °C 1410
1290
Specific Heat Capacity, J/kg-K 450
450
Thermal Conductivity, W/m-K 11
13
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.5
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 1.6
2.1

Otherwise Unclassified Properties

Density, g/cm3 8.4
8.4
Embodied Carbon, kg CO2/kg material 9.2
8.2
Embodied Energy, MJ/kg 120
110
Embodied Water, L/kg 270
530

Common Calculations

Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 25
33 to 44
Strength to Weight: Bending, points 22
27 to 32
Thermal Diffusivity, mm2/s 2.9
3.5
Thermal Shock Resistance, points 20
24 to 32

Alloy Composition

Aluminum (Al), % 0
0.3 to 1.0
Carbon (C), % 0.050 to 0.15
0 to 0.14
Chromium (Cr), % 20.5 to 23
26 to 30
Cobalt (Co), % 0.5 to 2.5
57.7 to 68.7
Copper (Cu), % 0 to 0.5
0
Iron (Fe), % 17 to 20
0 to 0.75
Lanthanum (La), % 0
0.030 to 0.2
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 8.0 to 10
5.0 to 7.0
Nickel (Ni), % 40.3 to 53.8
0 to 1.0
Nitrogen (N), % 0
0 to 0.25
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0
Tungsten (W), % 0.2 to 1.0
0
Residuals, % 0 to 0.5
0