R30155 Cobalt vs. EN 1.4640 Stainless Steel
Both R30155 cobalt and EN 1.4640 stainless steel are iron alloys. They have 57% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.
For each property being compared, the top bar is R30155 cobalt and the bottom bar is EN 1.4640 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 220 | |
| 190 to 200 |
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 200 |
| Elongation at Break, % | 34 | |
| 51 |
| Fatigue Strength, MPa | 310 | |
| 230 to 250 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Shear Modulus, GPa | 81 | |
| 77 |
| Shear Strength, MPa | 570 | |
| 440 to 460 |
| Tensile Strength: Ultimate (UTS), MPa | 850 | |
| 620 to 650 |
| Tensile Strength: Yield (Proof), MPa | 390 | |
| 240 to 260 |
Thermal Properties
| Latent Heat of Fusion, J/g | 300 | |
| 280 |
| Maximum Temperature: Corrosion, °C | 570 | |
| 420 |
| Maximum Temperature: Mechanical, °C | 1100 | |
| 930 |
| Melting Completion (Liquidus), °C | 1470 | |
| 1420 |
| Melting Onset (Solidus), °C | 1420 | |
| 1380 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 480 |
| Thermal Conductivity, W/m-K | 12 | |
| 15 |
| Thermal Expansion, µm/m-K | 14 | |
| 16 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 80 | |
| 14 |
| Density, g/cm3 | 8.5 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 9.7 | |
| 2.8 |
| Embodied Energy, MJ/kg | 150 | |
| 40 |
| Embodied Water, L/kg | 300 | |
| 150 |
Common Calculations
| PREN (Pitting Resistance) | 37 | |
| 20 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 230 | |
| 250 to 260 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 370 | |
| 150 to 170 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 23 | |
| 25 |
| Strength to Weight: Axial, points | 28 | |
| 22 to 23 |
| Strength to Weight: Bending, points | 24 | |
| 21 |
| Thermal Diffusivity, mm2/s | 3.2 | |
| 4.0 |
| Thermal Shock Resistance, points | 21 | |
| 14 to 15 |
Alloy Composition
| Carbon (C), % | 0.080 to 0.16 | |
| 0.030 to 0.080 |
| Chromium (Cr), % | 20 to 22.5 | |
| 18 to 19 |
| Cobalt (Co), % | 18.5 to 21 | |
| 0 |
| Copper (Cu), % | 0 | |
| 1.3 to 2.0 |
| Iron (Fe), % | 24.3 to 36.2 | |
| 67.4 to 73.6 |
| Manganese (Mn), % | 1.0 to 2.0 | |
| 1.5 to 4.0 |
| Molybdenum (Mo), % | 2.5 to 3.5 | |
| 0 |
| Nickel (Ni), % | 19 to 21 | |
| 5.5 to 6.9 |
| Niobium (Nb), % | 0.75 to 1.3 | |
| 0 |
| Nitrogen (N), % | 0 to 0.2 | |
| 0.030 to 0.11 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.045 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 0.5 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.015 |
| Tantalum (Ta), % | 0.75 to 1.3 | |
| 0 |
| Tungsten (W), % | 2.0 to 3.0 | |
| 0 |