R30035 Cobalt vs. EN 1.4303 Stainless Steel
R30035 cobalt belongs to the cobalt alloys classification, while EN 1.4303 stainless steel belongs to the iron alloys. They have a modest 31% of their average alloy composition in common, which, by itself, doesn't mean much. 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 R30035 cobalt and the bottom bar is EN 1.4303 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 220 to 230 | |
| 200 |
| Elongation at Break, % | 9.0 to 46 | |
| 13 to 49 |
| Fatigue Strength, MPa | 170 to 740 | |
| 220 to 320 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Shear Modulus, GPa | 84 to 89 | |
| 77 |
| Tensile Strength: Ultimate (UTS), MPa | 900 to 1900 | |
| 590 to 900 |
| Tensile Strength: Yield (Proof), MPa | 300 to 1650 | |
| 230 to 560 |
Thermal Properties
| Latent Heat of Fusion, J/g | 320 | |
| 290 |
| Melting Completion (Liquidus), °C | 1440 | |
| 1420 |
| Melting Onset (Solidus), °C | 1320 | |
| 1380 |
| Specific Heat Capacity, J/kg-K | 440 | |
| 480 |
| Thermal Conductivity, W/m-K | 11 | |
| 15 |
| Thermal Expansion, µm/m-K | 13 | |
| 16 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 1.7 | |
| 2.4 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 1.8 | |
| 2.7 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 100 | |
| 17 |
| Density, g/cm3 | 8.7 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 10 | |
| 3.2 |
| Embodied Energy, MJ/kg | 140 | |
| 46 |
| Embodied Water, L/kg | 410 | |
| 150 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 160 to 320 | |
| 110 to 230 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 210 to 5920 | |
| 140 to 800 |
| Stiffness to Weight: Axial, points | 14 to 15 | |
| 14 |
| Stiffness to Weight: Bending, points | 23 to 24 | |
| 25 |
| Strength to Weight: Axial, points | 29 to 61 | |
| 21 to 32 |
| Strength to Weight: Bending, points | 24 to 39 | |
| 20 to 26 |
| Thermal Diffusivity, mm2/s | 3.0 | |
| 4.0 |
| Thermal Shock Resistance, points | 23 to 46 | |
| 13 to 20 |
Alloy Composition
| Boron (B), % | 0 to 0.015 | |
| 0 |
| Carbon (C), % | 0 to 0.025 | |
| 0 to 0.060 |
| Chromium (Cr), % | 19 to 21 | |
| 17 to 19 |
| Cobalt (Co), % | 29.1 to 39 | |
| 0 |
| Iron (Fe), % | 0 to 1.0 | |
| 64.8 to 72 |
| Manganese (Mn), % | 0 to 0.15 | |
| 0 to 2.0 |
| Molybdenum (Mo), % | 9.0 to 10.5 | |
| 0 |
| Nickel (Ni), % | 33 to 37 | |
| 11 to 13 |
| Nitrogen (N), % | 0 | |
| 0 to 0.1 |
| Phosphorus (P), % | 0 to 0.015 | |
| 0 to 0.045 |
| Silicon (Si), % | 0 to 0.15 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.010 | |
| 0 to 0.015 |
| Titanium (Ti), % | 0 to 1.0 | |
| 0 |