AWS E310Mo vs. R30021 Cobalt
AWS E310Mo belongs to the iron alloys classification, while R30021 cobalt belongs to the cobalt alloys. They have a modest 33% of their average alloy composition in common, which, by itself, doesn't mean much. There are 23 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 E310Mo and the bottom bar is R30021 cobalt.
Metric UnitsUS Customary Units
Mechanical Properties
Elastic (Young's, Tensile) Modulus, GPa | 200 | |
220 |
Elongation at Break, % | 34 | |
9.0 |
Poisson's Ratio | 0.27 | |
0.29 |
Shear Modulus, GPa | 80 | |
86 |
Tensile Strength: Ultimate (UTS), MPa | 620 | |
700 |
Thermal Properties
Latent Heat of Fusion, J/g | 310 | |
330 |
Melting Completion (Liquidus), °C | 1420 | |
1350 |
Melting Onset (Solidus), °C | 1370 | |
1190 |
Specific Heat Capacity, J/kg-K | 470 | |
450 |
Thermal Conductivity, W/m-K | 14 | |
15 |
Thermal Expansion, µm/m-K | 14 | |
11 |
Electrical Properties
Electrical Conductivity: Equal Volume, % IACS | 2.2 | |
1.9 |
Electrical Conductivity: Equal Weight (Specific), % IACS | 2.4 | |
2.1 |
Otherwise Unclassified Properties
Density, g/cm3 | 7.9 | |
8.4 |
Embodied Carbon, kg CO2/kg material | 5.1 | |
8.0 |
Embodied Energy, MJ/kg | 71 | |
110 |
Embodied Water, L/kg | 210 | |
520 |
Common Calculations
Stiffness to Weight: Axial, points | 14 | |
15 |
Stiffness to Weight: Bending, points | 25 | |
24 |
Strength to Weight: Axial, points | 22 | |
23 |
Strength to Weight: Bending, points | 20 | |
21 |
Thermal Diffusivity, mm2/s | 3.7 | |
3.8 |
Thermal Shock Resistance, points | 15 | |
21 |
Alloy Composition
Carbon (C), % | 0 to 0.12 | |
0.2 to 0.35 |
Chromium (Cr), % | 25 to 28 | |
26 to 29 |
Cobalt (Co), % | 0 | |
61.7 to 67.3 |
Copper (Cu), % | 0 to 0.75 | |
0 |
Iron (Fe), % | 42.8 to 52 | |
0 to 3.0 |
Manganese (Mn), % | 1.0 to 2.5 | |
0 |
Molybdenum (Mo), % | 2.0 to 3.0 | |
4.5 to 6.0 |
Nickel (Ni), % | 20 to 22 | |
2.0 to 3.0 |
Phosphorus (P), % | 0 to 0.030 | |
0 |
Silicon (Si), % | 0 to 0.75 | |
0 to 1.5 |
Sulfur (S), % | 0 to 0.030 | |
0 |