R30075 Cobalt vs. S13800 Stainless Steel
R30075 cobalt belongs to the cobalt alloys classification, while S13800 stainless steel belongs to the iron alloys. There are 28 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 R30075 cobalt and the bottom bar is S13800 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 210 to 250 | |
| 200 |
| Elongation at Break, % | 12 | |
| 11 to 18 |
| Fatigue Strength, MPa | 250 to 840 | |
| 410 to 870 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Reduction in Area, % | 20 | |
| 39 to 62 |
| Shear Modulus, GPa | 82 to 98 | |
| 77 |
| Tensile Strength: Ultimate (UTS), MPa | 780 to 1280 | |
| 980 to 1730 |
| Tensile Strength: Yield (Proof), MPa | 480 to 840 | |
| 660 to 1580 |
Thermal Properties
| Latent Heat of Fusion, J/g | 320 | |
| 280 |
| Melting Completion (Liquidus), °C | 1360 | |
| 1450 |
| Melting Onset (Solidus), °C | 1290 | |
| 1410 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 470 |
| Thermal Conductivity, W/m-K | 13 | |
| 16 |
| Thermal Expansion, µm/m-K | 12 | |
| 11 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.0 | |
| 2.3 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.1 | |
| 2.6 |
Otherwise Unclassified Properties
| Density, g/cm3 | 8.4 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 8.1 | |
| 3.4 |
| Embodied Energy, MJ/kg | 110 | |
| 46 |
| Embodied Water, L/kg | 530 | |
| 140 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 84 to 140 | |
| 150 to 190 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 560 to 1410 | |
| 1090 to 5490 |
| Stiffness to Weight: Axial, points | 14 to 17 | |
| 14 |
| Stiffness to Weight: Bending, points | 24 to 25 | |
| 25 |
| Strength to Weight: Axial, points | 26 to 42 | |
| 35 to 61 |
| Strength to Weight: Bending, points | 22 to 31 | |
| 28 to 41 |
| Thermal Diffusivity, mm2/s | 3.5 | |
| 4.3 |
| Thermal Shock Resistance, points | 21 to 29 | |
| 33 to 58 |
Alloy Composition
| Aluminum (Al), % | 0 to 0.1 | |
| 0.9 to 1.4 |
| Boron (B), % | 0 to 0.010 | |
| 0 |
| Carbon (C), % | 0 to 0.35 | |
| 0 to 0.050 |
| Chromium (Cr), % | 27 to 30 | |
| 12.3 to 13.2 |
| Cobalt (Co), % | 58.7 to 68 | |
| 0 |
| Iron (Fe), % | 0 to 0.75 | |
| 73.6 to 77.3 |
| Manganese (Mn), % | 0 to 1.0 | |
| 0 to 0.2 |
| Molybdenum (Mo), % | 5.0 to 7.0 | |
| 2.0 to 3.0 |
| Nickel (Ni), % | 0 to 0.5 | |
| 7.5 to 8.5 |
| Nitrogen (N), % | 0 to 0.25 | |
| 0 to 0.010 |
| Phosphorus (P), % | 0 to 0.020 | |
| 0 to 0.010 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 0.1 |
| Sulfur (S), % | 0 to 0.010 | |
| 0 to 0.0080 |
| Titanium (Ti), % | 0 to 0.1 | |
| 0 |
| Tungsten (W), % | 0 to 0.2 | |
| 0 |