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AWS ERNiCrMo-2 vs. R31233 Cobalt

AWS ERNiCrMo-2 belongs to the nickel alloys classification, while R31233 cobalt belongs to the cobalt alloys. They have 42% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is AWS ERNiCrMo-2 and the bottom bar is R31233 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
85
Tensile Strength: Ultimate (UTS), MPa 750
1020

Thermal Properties

Latent Heat of Fusion, J/g 320
320
Melting Completion (Liquidus), °C 1460
1350
Melting Onset (Solidus), °C 1410
1330
Specific Heat Capacity, J/kg-K 450
440
Thermal Conductivity, W/m-K 11
12
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
8.6
Embodied Carbon, kg CO2/kg material 9.2
8.4
Embodied Energy, MJ/kg 120
110
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
33
Strength to Weight: Bending, points 22
26
Thermal Diffusivity, mm2/s 2.9
3.2
Thermal Shock Resistance, points 20
25

Alloy Composition

Boron (B), % 0
0 to 0.015
Carbon (C), % 0.050 to 0.15
0.020 to 0.1
Chromium (Cr), % 20.5 to 23
23.5 to 27.5
Cobalt (Co), % 0.5 to 2.5
44.7 to 63.3
Copper (Cu), % 0 to 0.5
0
Iron (Fe), % 17 to 20
1.0 to 5.0
Manganese (Mn), % 0 to 1.0
0.1 to 1.5
Molybdenum (Mo), % 8.0 to 10
4.0 to 6.0
Nickel (Ni), % 40.3 to 53.8
7.0 to 11
Nitrogen (N), % 0
0.030 to 0.12
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 1.0
0.050 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.020
Tungsten (W), % 0.2 to 1.0
1.0 to 3.0
Residuals, % 0 to 0.5
0