EN 1.7386 Steel vs. R30155 Cobalt
Both EN 1.7386 steel and R30155 cobalt are iron alloys. They have 41% of their average alloy composition in common. There are 30 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 1.7386 steel and the bottom bar is R30155 cobalt.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 170 to 200 | |
| 220 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 210 |
| Elongation at Break, % | 18 to 21 | |
| 34 |
| Fatigue Strength, MPa | 170 to 290 | |
| 310 |
| Poisson's Ratio | 0.28 | |
| 0.29 |
| Shear Modulus, GPa | 75 | |
| 81 |
| Shear Strength, MPa | 340 to 410 | |
| 570 |
| Tensile Strength: Ultimate (UTS), MPa | 550 to 670 | |
| 850 |
| Tensile Strength: Yield (Proof), MPa | 240 to 440 | |
| 390 |
Thermal Properties
| Latent Heat of Fusion, J/g | 270 | |
| 300 |
| Maximum Temperature: Mechanical, °C | 600 | |
| 1100 |
| Melting Completion (Liquidus), °C | 1450 | |
| 1470 |
| Melting Onset (Solidus), °C | 1410 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 450 |
| Thermal Conductivity, W/m-K | 26 | |
| 12 |
| Thermal Expansion, µm/m-K | 13 | |
| 14 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 6.5 | |
| 80 |
| Density, g/cm3 | 7.8 | |
| 8.5 |
| Embodied Carbon, kg CO2/kg material | 2.0 | |
| 9.7 |
| Embodied Energy, MJ/kg | 28 | |
| 150 |
| Embodied Water, L/kg | 88 | |
| 300 |
Common Calculations
| PREN (Pitting Resistance) | 12 | |
| 37 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 92 to 110 | |
| 230 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 150 to 490 | |
| 370 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 23 |
| Strength to Weight: Axial, points | 20 to 24 | |
| 28 |
| Strength to Weight: Bending, points | 19 to 22 | |
| 24 |
| Thermal Diffusivity, mm2/s | 6.9 | |
| 3.2 |
| Thermal Shock Resistance, points | 15 to 18 | |
| 21 |
Alloy Composition
| Aluminum (Al), % | 0 to 0.040 | |
| 0 |
| Carbon (C), % | 0.080 to 0.15 | |
| 0.080 to 0.16 |
| Chromium (Cr), % | 8.0 to 10 | |
| 20 to 22.5 |
| Cobalt (Co), % | 0 | |
| 18.5 to 21 |
| Copper (Cu), % | 0 to 0.3 | |
| 0 |
| Iron (Fe), % | 86.8 to 90.5 | |
| 24.3 to 36.2 |
| Manganese (Mn), % | 0.3 to 0.6 | |
| 1.0 to 2.0 |
| Molybdenum (Mo), % | 0.9 to 1.1 | |
| 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), % | 0.25 to 1.0 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.010 | |
| 0 to 0.030 |
| Tantalum (Ta), % | 0 | |
| 0.75 to 1.3 |
| Tungsten (W), % | 0 | |
| 2.0 to 3.0 |