EN 1.4938 Stainless Steel vs. R30035 Cobalt
EN 1.4938 stainless steel belongs to the iron alloys classification, while R30035 cobalt belongs to the cobalt alloys. There are 28 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.
For each property being compared, the top bar is EN 1.4938 stainless steel and the bottom bar is R30035 cobalt.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 220 to 230 |
| Elongation at Break, % | 16 to 17 | |
| 9.0 to 46 |
| Fatigue Strength, MPa | 390 to 520 | |
| 170 to 740 |
| Poisson's Ratio | 0.28 | |
| 0.29 |
| Shear Modulus, GPa | 76 | |
| 84 to 89 |
| Tensile Strength: Ultimate (UTS), MPa | 870 to 1030 | |
| 900 to 1900 |
| Tensile Strength: Yield (Proof), MPa | 640 to 870 | |
| 300 to 1650 |
Thermal Properties
| Latent Heat of Fusion, J/g | 270 | |
| 320 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1440 |
| Melting Onset (Solidus), °C | 1420 | |
| 1320 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 440 |
| Thermal Conductivity, W/m-K | 30 | |
| 11 |
| Thermal Expansion, µm/m-K | 11 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.9 | |
| 1.7 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 3.3 | |
| 1.8 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 10 | |
| 100 |
| Density, g/cm3 | 7.8 | |
| 8.7 |
| Embodied Carbon, kg CO2/kg material | 3.3 | |
| 10 |
| Embodied Energy, MJ/kg | 47 | |
| 140 |
| Embodied Water, L/kg | 110 | |
| 410 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 140 to 160 | |
| 160 to 320 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 1050 to 1920 | |
| 210 to 5920 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 to 15 |
| Stiffness to Weight: Bending, points | 25 | |
| 23 to 24 |
| Strength to Weight: Axial, points | 31 to 37 | |
| 29 to 61 |
| Strength to Weight: Bending, points | 26 to 29 | |
| 24 to 39 |
| Thermal Diffusivity, mm2/s | 8.1 | |
| 3.0 |
| Thermal Shock Resistance, points | 30 to 35 | |
| 23 to 46 |
Alloy Composition
| Boron (B), % | 0 | |
| 0 to 0.015 |
| Carbon (C), % | 0.080 to 0.15 | |
| 0 to 0.025 |
| Chromium (Cr), % | 11 to 12.5 | |
| 19 to 21 |
| Cobalt (Co), % | 0 | |
| 29.1 to 39 |
| Iron (Fe), % | 80.5 to 84.8 | |
| 0 to 1.0 |
| Manganese (Mn), % | 0.4 to 0.9 | |
| 0 to 0.15 |
| Molybdenum (Mo), % | 1.5 to 2.0 | |
| 9.0 to 10.5 |
| Nickel (Ni), % | 2.0 to 3.0 | |
| 33 to 37 |
| Nitrogen (N), % | 0.020 to 0.040 | |
| 0 |
| Phosphorus (P), % | 0 to 0.025 | |
| 0 to 0.015 |
| Silicon (Si), % | 0 to 0.5 | |
| 0 to 0.15 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 to 0.010 |
| Titanium (Ti), % | 0 | |
| 0 to 1.0 |
| Vanadium (V), % | 0.25 to 0.4 | |
| 0 |