EN 1.4938 Stainless Steel vs. R30075 Cobalt
EN 1.4938 stainless steel belongs to the iron alloys classification, while R30075 cobalt belongs to the cobalt alloys. There are 27 material properties with values for both materials. Properties with values for just one material (6, 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 R30075 cobalt.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 210 to 250 |
| Elongation at Break, % | 16 to 17 | |
| 12 |
| Fatigue Strength, MPa | 390 to 520 | |
| 250 to 840 |
| Poisson's Ratio | 0.28 | |
| 0.29 |
| Shear Modulus, GPa | 76 | |
| 82 to 98 |
| Tensile Strength: Ultimate (UTS), MPa | 870 to 1030 | |
| 780 to 1280 |
| Tensile Strength: Yield (Proof), MPa | 640 to 870 | |
| 480 to 840 |
Thermal Properties
| Latent Heat of Fusion, J/g | 270 | |
| 320 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1360 |
| Melting Onset (Solidus), °C | 1420 | |
| 1290 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 450 |
| Thermal Conductivity, W/m-K | 30 | |
| 13 |
| Thermal Expansion, µm/m-K | 11 | |
| 12 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.9 | |
| 2.0 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 3.3 | |
| 2.1 |
Otherwise Unclassified Properties
| Density, g/cm3 | 7.8 | |
| 8.4 |
| Embodied Carbon, kg CO2/kg material | 3.3 | |
| 8.1 |
| Embodied Energy, MJ/kg | 47 | |
| 110 |
| Embodied Water, L/kg | 110 | |
| 530 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 140 to 160 | |
| 84 to 140 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 1050 to 1920 | |
| 560 to 1410 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 to 17 |
| Stiffness to Weight: Bending, points | 25 | |
| 24 to 25 |
| Strength to Weight: Axial, points | 31 to 37 | |
| 26 to 42 |
| Strength to Weight: Bending, points | 26 to 29 | |
| 22 to 31 |
| Thermal Diffusivity, mm2/s | 8.1 | |
| 3.5 |
| Thermal Shock Resistance, points | 30 to 35 | |
| 21 to 29 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 0 to 0.1 |
| Boron (B), % | 0 | |
| 0 to 0.010 |
| Carbon (C), % | 0.080 to 0.15 | |
| 0 to 0.35 |
| Chromium (Cr), % | 11 to 12.5 | |
| 27 to 30 |
| Cobalt (Co), % | 0 | |
| 58.7 to 68 |
| Iron (Fe), % | 80.5 to 84.8 | |
| 0 to 0.75 |
| Manganese (Mn), % | 0.4 to 0.9 | |
| 0 to 1.0 |
| Molybdenum (Mo), % | 1.5 to 2.0 | |
| 5.0 to 7.0 |
| Nickel (Ni), % | 2.0 to 3.0 | |
| 0 to 0.5 |
| Nitrogen (N), % | 0.020 to 0.040 | |
| 0 to 0.25 |
| Phosphorus (P), % | 0 to 0.025 | |
| 0 to 0.020 |
| Silicon (Si), % | 0 to 0.5 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 to 0.010 |
| Titanium (Ti), % | 0 | |
| 0 to 0.1 |
| Tungsten (W), % | 0 | |
| 0 to 0.2 |
| Vanadium (V), % | 0.25 to 0.4 | |
| 0 |