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AWS ERNiMo-3 vs. R30003 Cobalt

AWS ERNiMo-3 belongs to the nickel alloys classification, while R30003 cobalt belongs to the cobalt alloys. They have a modest 35% 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 (8, in this case) are not shown.

For each property being compared, the top bar is AWS ERNiMo-3 and the bottom bar is R30003 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
210
Poisson's Ratio 0.3
0.29
Shear Modulus, GPa 83
83
Tensile Strength: Ultimate (UTS), MPa 770
970 to 1720

Thermal Properties

Latent Heat of Fusion, J/g 320
310
Melting Completion (Liquidus), °C 1600
1400
Melting Onset (Solidus), °C 1540
1440
Specific Heat Capacity, J/kg-K 400
450
Thermal Expansion, µm/m-K 11
13

Otherwise Unclassified Properties

Base Metal Price, % relative 70
95
Density, g/cm3 9.1
8.4
Embodied Carbon, kg CO2/kg material 15
8.0
Embodied Energy, MJ/kg 190
110
Embodied Water, L/kg 270
400

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 22
24
Strength to Weight: Axial, points 24
32 to 57
Strength to Weight: Bending, points 21
26 to 38
Thermal Shock Resistance, points 24
26 to 45

Alloy Composition


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Boron (B), % 0
0 to 0.1
Carbon (C), % 0 to 0.12
0 to 0.15
Chromium (Cr), % 4.0 to 6.0
19 to 21
Cobalt (Co), % 0 to 2.5
39 to 41
Copper (Cu), % 0 to 0.5
0
Iron (Fe), % 4.0 to 7.0
10 to 20.5
Manganese (Mn), % 0 to 1.0
1.5 to 2.5
Molybdenum (Mo), % 23 to 26
6.0 to 8.0
Nickel (Ni), % 53.7 to 69
14 to 16
Phosphorus (P), % 0 to 0.040
0 to 0.015
Silicon (Si), % 0 to 1.0
0 to 1.2
Sulfur (S), % 0 to 0.030
0 to 0.015
Tungsten (W), % 0 to 1.0
0
Vanadium (V), % 0 to 0.6
0
Residuals, % 0 to 0.5
0