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AWS ERNi-1 vs. R31233 Cobalt

AWS ERNi-1 belongs to the nickel alloys classification, while R31233 cobalt belongs to the cobalt alloys. There are 23 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is AWS ERNi-1 and the bottom bar is R31233 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 180
220
Elongation at Break, % 22
17
Poisson's Ratio 0.31
0.29
Shear Modulus, GPa 69
85
Tensile Strength: Ultimate (UTS), MPa 470
1020

Thermal Properties

Latent Heat of Fusion, J/g 300
320
Melting Completion (Liquidus), °C 1360
1350
Melting Onset (Solidus), °C 1310
1330
Specific Heat Capacity, J/kg-K 450
440
Thermal Conductivity, W/m-K 73
12
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 19
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 19
2.1

Otherwise Unclassified Properties

Density, g/cm3 8.7
8.6
Embodied Carbon, kg CO2/kg material 11
8.4
Embodied Energy, MJ/kg 150
110
Embodied Water, L/kg 230
480

Common Calculations

Stiffness to Weight: Axial, points 12
14
Stiffness to Weight: Bending, points 22
23
Strength to Weight: Axial, points 15
33
Strength to Weight: Bending, points 15
26
Thermal Diffusivity, mm2/s 19
3.2
Thermal Shock Resistance, points 17
25

Alloy Composition

Aluminum (Al), % 0 to 1.5
0
Boron (B), % 0
0 to 0.015
Carbon (C), % 0 to 0.15
0.020 to 0.1
Chromium (Cr), % 0
23.5 to 27.5
Cobalt (Co), % 0
44.7 to 63.3
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 0 to 1.0
1.0 to 5.0
Manganese (Mn), % 0 to 1.0
0.1 to 1.5
Molybdenum (Mo), % 0
4.0 to 6.0
Nickel (Ni), % 93 to 98
7.0 to 11
Nitrogen (N), % 0
0.030 to 0.12
Phosphorus (P), % 0 to 0.030
0 to 0.030
Silicon (Si), % 0 to 0.75
0.050 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.020
Titanium (Ti), % 2.0 to 3.5
0
Tungsten (W), % 0
1.0 to 3.0
Residuals, % 0 to 0.5
0