EN 1.4028 Stainless Steel vs. R30155 Cobalt
Both EN 1.4028 stainless steel and R30155 cobalt are iron alloys. They have 45% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.
For each property being compared, the top bar is EN 1.4028 stainless steel and the bottom bar is R30155 cobalt.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 210 |
| Elongation at Break, % | 11 to 17 | |
| 34 |
| Fatigue Strength, MPa | 230 to 400 | |
| 310 |
| Poisson's Ratio | 0.28 | |
| 0.29 |
| Shear Modulus, GPa | 76 | |
| 81 |
| Shear Strength, MPa | 410 to 550 | |
| 570 |
| Tensile Strength: Ultimate (UTS), MPa | 660 to 930 | |
| 850 |
| Tensile Strength: Yield (Proof), MPa | 390 to 730 | |
| 390 |
Thermal Properties
| Latent Heat of Fusion, J/g | 270 | |
| 300 |
| Maximum Temperature: Corrosion, °C | 390 | |
| 570 |
| Maximum Temperature: Mechanical, °C | 760 | |
| 1100 |
| Melting Completion (Liquidus), °C | 1440 | |
| 1470 |
| Melting Onset (Solidus), °C | 1400 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 450 |
| Thermal Conductivity, W/m-K | 30 | |
| 12 |
| Thermal Expansion, µm/m-K | 11 | |
| 14 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 7.0 | |
| 80 |
| Density, g/cm3 | 7.7 | |
| 8.5 |
| Embodied Carbon, kg CO2/kg material | 1.9 | |
| 9.7 |
| Embodied Energy, MJ/kg | 27 | |
| 150 |
| Embodied Water, L/kg | 100 | |
| 300 |
Common Calculations
| PREN (Pitting Resistance) | 13 | |
| 37 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 94 to 96 | |
| 230 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 380 to 1360 | |
| 370 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 23 |
| Strength to Weight: Axial, points | 24 to 33 | |
| 28 |
| Strength to Weight: Bending, points | 22 to 27 | |
| 24 |
| Thermal Diffusivity, mm2/s | 8.1 | |
| 3.2 |
| Thermal Shock Resistance, points | 23 to 32 | |
| 21 |
Alloy Composition
| Carbon (C), % | 0.26 to 0.35 | |
| 0.080 to 0.16 |
| Chromium (Cr), % | 12 to 14 | |
| 20 to 22.5 |
| Cobalt (Co), % | 0 | |
| 18.5 to 21 |
| Iron (Fe), % | 83.1 to 87.7 | |
| 24.3 to 36.2 |
| Manganese (Mn), % | 0 to 1.5 | |
| 1.0 to 2.0 |
| Molybdenum (Mo), % | 0 | |
| 2.5 to 3.5 |
| Nickel (Ni), % | 0 | |
| 19 to 21 |
| Niobium (Nb), % | 0 | |
| 0.75 to 1.3 |
| Nitrogen (N), % | 0 | |
| 0 to 0.2 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 to 0.030 |
| Tantalum (Ta), % | 0 | |
| 0.75 to 1.3 |
| Tungsten (W), % | 0 | |
| 2.0 to 3.0 |