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AWS ERNiCrMo-4 vs. R31537 Cobalt

AWS ERNiCrMo-4 belongs to the nickel alloys classification, while R31537 cobalt belongs to the cobalt alloys. They have a modest 24% of their average alloy composition in common, which, by itself, doesn't mean much. There are 19 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is AWS ERNiCrMo-4 and the bottom bar is R31537 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
220
Elongation at Break, % 28
14 to 23
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 84
87
Tensile Strength: Ultimate (UTS), MPa 790
1000 to 1340

Thermal Properties

Latent Heat of Fusion, J/g 310
320
Melting Completion (Liquidus), °C 1590
1360
Melting Onset (Solidus), °C 1530
1290
Specific Heat Capacity, J/kg-K 410
450
Thermal Expansion, µm/m-K 12
13

Otherwise Unclassified Properties

Density, g/cm3 9.0
8.4
Embodied Carbon, kg CO2/kg material 13
8.1
Embodied Energy, MJ/kg 170
110
Embodied Water, L/kg 280
530

Common Calculations

Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 22
24
Strength to Weight: Axial, points 24
33 to 44
Strength to Weight: Bending, points 21
26 to 32
Thermal Shock Resistance, points 22
24 to 32

Alloy Composition


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Carbon (C), % 0 to 0.020
0 to 0.14
Chromium (Cr), % 14.5 to 16.5
26 to 30
Cobalt (Co), % 0 to 2.5
58.9 to 69
Copper (Cu), % 0 to 0.5
0
Iron (Fe), % 4.0 to 7.0
0 to 0.75
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 15 to 17
5.0 to 7.0
Nickel (Ni), % 50 to 63.5
0 to 1.0
Nitrogen (N), % 0
0 to 0.25
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 0.080
0 to 1.0
Sulfur (S), % 0 to 0.030
0
Tungsten (W), % 3.0 to 4.5
0
Vanadium (V), % 0 to 0.35
0
Residuals, % 0 to 0.5
0