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R31538 Cobalt vs. AWS ERNiMo-3

R31538 cobalt belongs to the cobalt alloys classification, while AWS ERNiMo-3 belongs to the nickel alloys. There are 18 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is R31538 cobalt and the bottom bar is AWS ERNiMo-3.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
220
Poisson's Ratio 0.29
0.3
Shear Modulus, GPa 86
83
Tensile Strength: Ultimate (UTS), MPa 1020 to 1360
770

Thermal Properties

Latent Heat of Fusion, J/g 320
320
Melting Completion (Liquidus), °C 1360
1600
Melting Onset (Solidus), °C 1290
1540
Specific Heat Capacity, J/kg-K 450
400
Thermal Expansion, µm/m-K 13
11

Otherwise Unclassified Properties

Density, g/cm3 8.4
9.1
Embodied Carbon, kg CO2/kg material 8.1
15
Embodied Energy, MJ/kg 110
190
Embodied Water, L/kg 530
270

Common Calculations

Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 24
22
Strength to Weight: Axial, points 34 to 45
24
Strength to Weight: Bending, points 27 to 32
21
Thermal Shock Resistance, points 25 to 33
24

Alloy Composition


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Carbon (C), % 0.15 to 0.35
0 to 0.12
Chromium (Cr), % 26 to 30
4.0 to 6.0
Cobalt (Co), % 58.7 to 68.9
0 to 2.5
Copper (Cu), % 0
0 to 0.5
Iron (Fe), % 0 to 0.75
4.0 to 7.0
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 5.0 to 7.0
23 to 26
Nickel (Ni), % 0 to 1.0
53.7 to 69
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 to 1.0
Vanadium (V), % 0
0 to 0.6
Residuals, % 0
0 to 0.5