R30003 Cobalt vs. EN 1.7390 Steel
R30003 cobalt belongs to the cobalt alloys classification, while EN 1.7390 steel belongs to the iron alloys. They have a modest 22% of their average alloy composition in common, which, by itself, doesn't mean much. There are 27 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.
For each property being compared, the top bar is R30003 cobalt and the bottom bar is EN 1.7390 steel.
Metric UnitsUS Customary Units
Mechanical Properties
Elastic (Young's, Tensile) Modulus, GPa | 210 | |
190 |
Elongation at Break, % | 10 to 73 | |
16 |
Fatigue Strength, MPa | 320 to 560 | |
310 |
Poisson's Ratio | 0.29 | |
0.29 |
Shear Modulus, GPa | 83 | |
74 |
Tensile Strength: Ultimate (UTS), MPa | 970 to 1720 | |
710 |
Tensile Strength: Yield (Proof), MPa | 510 to 1090 | |
480 |
Thermal Properties
Latent Heat of Fusion, J/g | 310 | |
260 |
Melting Completion (Liquidus), °C | 1400 | |
1460 |
Melting Onset (Solidus), °C | 1440 | |
1420 |
Specific Heat Capacity, J/kg-K | 450 | |
470 |
Thermal Conductivity, W/m-K | 13 | |
40 |
Thermal Expansion, µm/m-K | 13 | |
13 |
Electrical Properties
Electrical Conductivity: Equal Volume, % IACS | 2.0 | |
8.1 |
Electrical Conductivity: Equal Weight (Specific), % IACS | 2.1 | |
9.3 |
Otherwise Unclassified Properties
Base Metal Price, % relative | 95 | |
4.3 |
Density, g/cm3 | 8.4 | |
7.8 |
Embodied Carbon, kg CO2/kg material | 8.0 | |
1.7 |
Embodied Energy, MJ/kg | 110 | |
23 |
Embodied Water, L/kg | 400 | |
69 |
Common Calculations
Resilience: Unit (Modulus of Resilience), kJ/m3 | 600 to 2790 | |
600 |
Stiffness to Weight: Axial, points | 14 | |
14 |
Stiffness to Weight: Bending, points | 24 | |
25 |
Strength to Weight: Axial, points | 32 to 57 | |
25 |
Strength to Weight: Bending, points | 26 to 38 | |
23 |
Thermal Diffusivity, mm2/s | 3.3 | |
11 |
Thermal Shock Resistance, points | 26 to 45 | |
20 |
Alloy Composition
Boron (B), % | 0 to 0.1 | |
0 |
Carbon (C), % | 0 to 0.15 | |
0 to 0.18 |
Chromium (Cr), % | 19 to 21 | |
4.0 to 6.0 |
Cobalt (Co), % | 39 to 41 | |
0 |
Iron (Fe), % | 10 to 20.5 | |
91.9 to 95.3 |
Manganese (Mn), % | 1.5 to 2.5 | |
0.3 to 0.8 |
Molybdenum (Mo), % | 6.0 to 8.0 | |
0.45 to 0.65 |
Nickel (Ni), % | 14 to 16 | |
0 |
Phosphorus (P), % | 0 to 0.015 | |
0 to 0.025 |
Silicon (Si), % | 0 to 1.2 | |
0 to 0.4 |
Sulfur (S), % | 0 to 0.015 | |
0 to 0.015 |