R30155 Cobalt vs. EN 1.4571 Stainless Steel
Both R30155 cobalt and EN 1.4571 stainless steel are iron alloys. They have 64% 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 1.4571 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 220 | |
| 190 to 270 |
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 200 |
| Elongation at Break, % | 34 | |
| 14 to 40 |
| Fatigue Strength, MPa | 310 | |
| 200 to 330 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Shear Modulus, GPa | 81 | |
| 78 |
| Shear Strength, MPa | 570 | |
| 410 to 550 |
| Tensile Strength: Ultimate (UTS), MPa | 850 | |
| 600 to 900 |
| Tensile Strength: Yield (Proof), MPa | 390 | |
| 230 to 570 |
Thermal Properties
| Latent Heat of Fusion, J/g | 300 | |
| 290 |
| Maximum Temperature: Corrosion, °C | 570 | |
| 480 |
| Maximum Temperature: Mechanical, °C | 1100 | |
| 950 |
| Melting Completion (Liquidus), °C | 1470 | |
| 1440 |
| Melting Onset (Solidus), °C | 1420 | |
| 1400 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 470 |
| Thermal Conductivity, W/m-K | 12 | |
| 15 |
| Thermal Expansion, µm/m-K | 14 | |
| 17 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 80 | |
| 19 |
| Density, g/cm3 | 8.5 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 9.7 | |
| 3.9 |
| Embodied Energy, MJ/kg | 150 | |
| 54 |
| Embodied Water, L/kg | 300 | |
| 150 |
Common Calculations
| PREN (Pitting Resistance) | 37 | |
| 25 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 230 | |
| 110 to 190 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 370 | |
| 130 to 820 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 23 | |
| 25 |
| Strength to Weight: Axial, points | 28 | |
| 21 to 32 |
| Strength to Weight: Bending, points | 24 | |
| 20 to 26 |
| Thermal Diffusivity, mm2/s | 3.2 | |
| 4.0 |
| Thermal Shock Resistance, points | 21 | |
| 13 to 20 |
Alloy Composition
| Carbon (C), % | 0.080 to 0.16 | |
| 0 to 0.080 |
| Chromium (Cr), % | 20 to 22.5 | |
| 16.5 to 18.5 |
| Cobalt (Co), % | 18.5 to 21 | |
| 0 |
| Iron (Fe), % | 24.3 to 36.2 | |
| 61.7 to 71 |
| Manganese (Mn), % | 1.0 to 2.0 | |
| 0 to 2.0 |
| Molybdenum (Mo), % | 2.5 to 3.5 | |
| 2.0 to 2.5 |
| Nickel (Ni), % | 19 to 21 | |
| 10.5 to 13.5 |
| Niobium (Nb), % | 0.75 to 1.3 | |
| 0 |
| Nitrogen (N), % | 0 to 0.2 | |
| 0 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.045 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.015 |
| Tantalum (Ta), % | 0.75 to 1.3 | |
| 0 |
| Titanium (Ti), % | 0 | |
| 0 to 0.7 |
| Tungsten (W), % | 2.0 to 3.0 | |
| 0 |