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AWS ENiCrMo-10 vs. R31538 Cobalt

AWS ENiCrMo-10 belongs to the nickel alloys classification, while R31538 cobalt belongs to the cobalt alloys. They have a modest 30% of their average alloy composition in common, which, by itself, doesn't mean much. There are 23 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is AWS ENiCrMo-10 and the bottom bar is R31538 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
220
Elongation at Break, % 28
13 to 23
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 84
86
Tensile Strength: Ultimate (UTS), MPa 710
1020 to 1360

Thermal Properties

Latent Heat of Fusion, J/g 320
320
Melting Completion (Liquidus), °C 1550
1360
Melting Onset (Solidus), °C 1490
1290
Specific Heat Capacity, J/kg-K 420
450
Thermal Conductivity, W/m-K 10
13
Thermal Expansion, µm/m-K 12
13

Electrical Properties

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

Otherwise Unclassified Properties

Density, g/cm3 8.9
8.4
Embodied Carbon, kg CO2/kg material 12
8.1
Embodied Energy, MJ/kg 160
110
Embodied Water, L/kg 300
530

Common Calculations

Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 22
34 to 45
Strength to Weight: Bending, points 20
27 to 32
Thermal Diffusivity, mm2/s 2.7
3.5
Thermal Shock Resistance, points 19
25 to 33

Alloy Composition

Carbon (C), % 0 to 0.020
0.15 to 0.35
Chromium (Cr), % 20 to 22.5
26 to 30
Cobalt (Co), % 0 to 2.5
58.7 to 68.9
Copper (Cu), % 0 to 0.5
0
Iron (Fe), % 2.0 to 6.0
0 to 0.75
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 12.5 to 14.5
5.0 to 7.0
Nickel (Ni), % 48.4 to 63
0 to 1.0
Nitrogen (N), % 0
0 to 0.25
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0 to 0.2
0 to 1.0
Sulfur (S), % 0 to 0.015
0
Tungsten (W), % 2.5 to 3.5
0
Vanadium (V), % 0 to 0.35
0
Residuals, % 0 to 0.5
0