EN 1.1170 Steel vs. R30816 Cobalt
EN 1.1170 steel belongs to the iron alloys classification, while R30816 cobalt belongs to the cobalt alloys. There are 26 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 EN 1.1170 steel and the bottom bar is R30816 cobalt.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 180 to 210 | |
| 280 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 210 |
| Elongation at Break, % | 16 to 17 | |
| 23 |
| Fatigue Strength, MPa | 220 to 330 | |
| 250 |
| Poisson's Ratio | 0.29 | |
| 0.3 |
| Shear Modulus, GPa | 73 | |
| 81 |
| Tensile Strength: Ultimate (UTS), MPa | 640 to 730 | |
| 1020 |
| Tensile Strength: Yield (Proof), MPa | 330 to 500 | |
| 460 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 300 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1540 |
| Melting Onset (Solidus), °C | 1420 | |
| 1460 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 420 |
| Thermal Conductivity, W/m-K | 50 | |
| 13 |
| Thermal Expansion, µm/m-K | 12 | |
| 12 |
Otherwise Unclassified Properties
| Density, g/cm3 | 7.8 | |
| 9.1 |
| Embodied Carbon, kg CO2/kg material | 1.5 | |
| 20 |
| Embodied Energy, MJ/kg | 19 | |
| 320 |
| Embodied Water, L/kg | 49 | |
| 440 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 91 to 100 | |
| 190 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 290 to 670 | |
| 510 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 22 |
| Strength to Weight: Axial, points | 23 to 26 | |
| 31 |
| Strength to Weight: Bending, points | 21 to 23 | |
| 25 |
| Thermal Diffusivity, mm2/s | 13 | |
| 3.3 |
| Thermal Shock Resistance, points | 20 to 23 | |
| 28 |
Alloy Composition
| Carbon (C), % | 0.25 to 0.32 | |
| 0.32 to 0.42 |
| Chromium (Cr), % | 0 to 0.4 | |
| 19 to 21 |
| Cobalt (Co), % | 0 | |
| 40 to 49.8 |
| Iron (Fe), % | 96.7 to 98.5 | |
| 0 to 5.0 |
| Manganese (Mn), % | 1.3 to 1.7 | |
| 1.0 to 2.0 |
| Molybdenum (Mo), % | 0 to 0.1 | |
| 3.5 to 4.5 |
| Nickel (Ni), % | 0 to 0.4 | |
| 19 to 21 |
| Niobium (Nb), % | 0 | |
| 3.5 to 4.5 |
| Phosphorus (P), % | 0 to 0.035 | |
| 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 | |
| 3.5 to 4.5 |
| Tungsten (W), % | 0 | |
| 3.5 to 4.5 |