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R31537 Cobalt vs. AWS ERNiCrMo-2

R31537 cobalt belongs to the cobalt alloys classification, while AWS ERNiCrMo-2 belongs to the nickel 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 R31537 cobalt and the bottom bar is AWS ERNiCrMo-2.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
210
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 87
81
Tensile Strength: Ultimate (UTS), MPa 1000 to 1340
750

Thermal Properties

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

Electrical Properties

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

Otherwise Unclassified Properties

Density, g/cm3 8.4
8.4
Embodied Carbon, kg CO2/kg material 8.1
9.2
Embodied Energy, MJ/kg 110
120
Embodied Water, L/kg 530
270

Common Calculations

Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 24
23
Strength to Weight: Axial, points 33 to 44
25
Strength to Weight: Bending, points 26 to 32
22
Thermal Diffusivity, mm2/s 3.4
2.9
Thermal Shock Resistance, points 24 to 32
20

Alloy Composition

Carbon (C), % 0 to 0.14
0.050 to 0.15
Chromium (Cr), % 26 to 30
20.5 to 23
Cobalt (Co), % 58.9 to 69
0.5 to 2.5
Copper (Cu), % 0
0 to 0.5
Iron (Fe), % 0 to 0.75
17 to 20
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 5.0 to 7.0
8.0 to 10
Nickel (Ni), % 0 to 1.0
40.3 to 53.8
Nitrogen (N), % 0 to 0.25
0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Tungsten (W), % 0
0.2 to 1.0
Residuals, % 0
0 to 0.5