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AWS ERNiCrMo-2 vs. R30605 Cobalt

AWS ERNiCrMo-2 belongs to the nickel alloys classification, while R30605 cobalt belongs to the cobalt alloys. They have a modest 34% 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 (4, in this case) are not shown.

For each property being compared, the top bar is AWS ERNiCrMo-2 and the bottom bar is R30605 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
210
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 81
81
Tensile Strength: Ultimate (UTS), MPa 750
1130 to 1900

Thermal Properties

Latent Heat of Fusion, J/g 320
290
Melting Completion (Liquidus), °C 1460
1410
Melting Onset (Solidus), °C 1410
1330
Specific Heat Capacity, J/kg-K 450
410
Thermal Conductivity, W/m-K 11
9.6
Thermal Expansion, µm/m-K 13
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.5
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 1.6
1.8

Otherwise Unclassified Properties

Density, g/cm3 8.4
9.6
Embodied Carbon, kg CO2/kg material 9.2
9.8
Embodied Energy, MJ/kg 120
140
Embodied Water, L/kg 270
450

Common Calculations

Stiffness to Weight: Axial, points 14
12
Stiffness to Weight: Bending, points 23
21
Strength to Weight: Axial, points 25
33 to 55
Strength to Weight: Bending, points 22
25 to 36
Thermal Diffusivity, mm2/s 2.9
2.5
Thermal Shock Resistance, points 20
31 to 52

Alloy Composition

Carbon (C), % 0.050 to 0.15
0.050 to 0.15
Chromium (Cr), % 20.5 to 23
19 to 21
Cobalt (Co), % 0.5 to 2.5
46.4 to 57
Copper (Cu), % 0 to 0.5
0
Iron (Fe), % 17 to 20
0 to 3.0
Manganese (Mn), % 0 to 1.0
1.0 to 2.0
Molybdenum (Mo), % 8.0 to 10
0
Nickel (Ni), % 40.3 to 53.8
9.0 to 11
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 0.4
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 0.2 to 1.0
14 to 16
Residuals, % 0 to 0.5
0