R30155 Cobalt vs. EN 1.4525 Stainless Steel
Both R30155 cobalt and EN 1.4525 stainless steel are iron alloys. They have 52% of their average alloy composition in common. There are 29 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 R30155 cobalt and the bottom bar is EN 1.4525 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 190 |
| Elongation at Break, % | 34 | |
| 5.6 to 13 |
| Fatigue Strength, MPa | 310 | |
| 480 to 540 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Shear Modulus, GPa | 81 | |
| 76 |
| Tensile Strength: Ultimate (UTS), MPa | 850 | |
| 1030 to 1250 |
| Tensile Strength: Yield (Proof), MPa | 390 | |
| 840 to 1120 |
Thermal Properties
| Latent Heat of Fusion, J/g | 300 | |
| 280 |
| Maximum Temperature: Corrosion, °C | 570 | |
| 430 |
| Maximum Temperature: Mechanical, °C | 1100 | |
| 860 |
| Melting Completion (Liquidus), °C | 1470 | |
| 1430 |
| Melting Onset (Solidus), °C | 1420 | |
| 1390 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 480 |
| Thermal Conductivity, W/m-K | 12 | |
| 18 |
| Thermal Expansion, µm/m-K | 14 | |
| 11 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 80 | |
| 13 |
| Density, g/cm3 | 8.5 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 9.7 | |
| 2.8 |
| Embodied Energy, MJ/kg | 150 | |
| 39 |
| Embodied Water, L/kg | 300 | |
| 130 |
Common Calculations
| PREN (Pitting Resistance) | 37 | |
| 18 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 230 | |
| 68 to 130 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 370 | |
| 1820 to 3230 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 23 | |
| 25 |
| Strength to Weight: Axial, points | 28 | |
| 36 to 45 |
| Strength to Weight: Bending, points | 24 | |
| 29 to 33 |
| Thermal Diffusivity, mm2/s | 3.2 | |
| 4.7 |
| Thermal Shock Resistance, points | 21 | |
| 34 to 41 |
Alloy Composition
| Carbon (C), % | 0.080 to 0.16 | |
| 0 to 0.070 |
| Chromium (Cr), % | 20 to 22.5 | |
| 15 to 17 |
| Cobalt (Co), % | 18.5 to 21 | |
| 0 |
| Copper (Cu), % | 0 | |
| 2.5 to 4.0 |
| Iron (Fe), % | 24.3 to 36.2 | |
| 70.4 to 79 |
| Manganese (Mn), % | 1.0 to 2.0 | |
| 0 to 1.0 |
| Molybdenum (Mo), % | 2.5 to 3.5 | |
| 0 to 0.8 |
| Nickel (Ni), % | 19 to 21 | |
| 3.5 to 5.5 |
| Niobium (Nb), % | 0.75 to 1.3 | |
| 0 to 0.35 |
| Nitrogen (N), % | 0 to 0.2 | |
| 0 to 0.050 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.035 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 0.8 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.025 |
| Tantalum (Ta), % | 0.75 to 1.3 | |
| 0 |
| Tungsten (W), % | 2.0 to 3.0 | |
| 0 |