EN 1.7233 Steel vs. R30155 Cobalt
Both EN 1.7233 steel and R30155 cobalt are iron alloys. They have a modest 33% of their average alloy composition in common, which, by itself, doesn't mean much. 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 1.7233 steel and the bottom bar is R30155 cobalt.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 210 to 290 | |
| 220 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 210 |
| Elongation at Break, % | 18 to 23 | |
| 34 |
| Fatigue Strength, MPa | 270 to 530 | |
| 310 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 73 | |
| 81 |
| Shear Strength, MPa | 450 to 590 | |
| 570 |
| Tensile Strength: Ultimate (UTS), MPa | 700 to 960 | |
| 850 |
| Tensile Strength: Yield (Proof), MPa | 380 to 780 | |
| 390 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 300 |
| Maximum Temperature: Mechanical, °C | 430 | |
| 1100 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1470 |
| Melting Onset (Solidus), °C | 1420 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 450 |
| Thermal Conductivity, W/m-K | 39 | |
| 12 |
| Thermal Expansion, µm/m-K | 13 | |
| 14 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 3.0 | |
| 80 |
| Density, g/cm3 | 7.8 | |
| 8.5 |
| Embodied Carbon, kg CO2/kg material | 1.6 | |
| 9.7 |
| Embodied Energy, MJ/kg | 21 | |
| 150 |
| Embodied Water, L/kg | 53 | |
| 300 |
Common Calculations
| PREN (Pitting Resistance) | 3.3 | |
| 37 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 110 to 200 | |
| 230 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 380 to 1630 | |
| 370 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 24 | |
| 23 |
| Strength to Weight: Axial, points | 25 to 34 | |
| 28 |
| Strength to Weight: Bending, points | 22 to 28 | |
| 24 |
| Thermal Diffusivity, mm2/s | 11 | |
| 3.2 |
| Thermal Shock Resistance, points | 21 to 28 | |
| 21 |
Alloy Composition
| Carbon (C), % | 0.39 to 0.45 | |
| 0.080 to 0.16 |
| Chromium (Cr), % | 1.2 to 1.5 | |
| 20 to 22.5 |
| Cobalt (Co), % | 0 | |
| 18.5 to 21 |
| Iron (Fe), % | 96.2 to 97.5 | |
| 24.3 to 36.2 |
| Manganese (Mn), % | 0.4 to 0.7 | |
| 1.0 to 2.0 |
| Molybdenum (Mo), % | 0.5 to 0.7 | |
| 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 0.025 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 0.4 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.035 | |
| 0 to 0.030 |
| Tantalum (Ta), % | 0 | |
| 0.75 to 1.3 |
| Tungsten (W), % | 0 | |
| 2.0 to 3.0 |