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AWS ERNiCrMo-2 vs. R30001 Cobalt

AWS ERNiCrMo-2 belongs to the nickel alloys classification, while R30001 cobalt belongs to the cobalt alloys. They have a modest 28% 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 R30001 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
220
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 81
86
Tensile Strength: Ultimate (UTS), MPa 750
620

Thermal Properties

Latent Heat of Fusion, J/g 320
310
Melting Completion (Liquidus), °C 1460
1530
Melting Onset (Solidus), °C 1410
1260
Specific Heat Capacity, J/kg-K 450
430
Thermal Conductivity, W/m-K 11
15
Thermal Expansion, µm/m-K 13
11

Electrical Properties

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

Otherwise Unclassified Properties

Density, g/cm3 8.4
9.0
Embodied Carbon, kg CO2/kg material 9.2
8.9
Embodied Energy, MJ/kg 120
130
Embodied Water, L/kg 270
460

Common Calculations

Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 23
22
Strength to Weight: Axial, points 25
19
Strength to Weight: Bending, points 22
18
Thermal Diffusivity, mm2/s 2.9
3.7
Thermal Shock Resistance, points 20
19

Alloy Composition

Carbon (C), % 0.050 to 0.15
2.0 to 3.0
Chromium (Cr), % 20.5 to 23
28 to 32
Cobalt (Co), % 0.5 to 2.5
43 to 59
Copper (Cu), % 0 to 0.5
0
Iron (Fe), % 17 to 20
0 to 3.0
Manganese (Mn), % 0 to 1.0
0
Molybdenum (Mo), % 8.0 to 10
0 to 1.0
Nickel (Ni), % 40.3 to 53.8
0 to 3.0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0 to 2.0
Sulfur (S), % 0 to 0.030
0
Tungsten (W), % 0.2 to 1.0
11 to 13
Residuals, % 0 to 0.5
0