R30155 Cobalt vs. EN 1.4923 Stainless Steel
Both R30155 cobalt and EN 1.4923 stainless steel are iron alloys. They have 45% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.
For each property being compared, the top bar is R30155 cobalt and the bottom bar is EN 1.4923 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 190 |
| Elongation at Break, % | 34 | |
| 12 to 21 |
| Fatigue Strength, MPa | 310 | |
| 300 to 440 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Reduction in Area, % | 34 | |
| 40 to 46 |
| Shear Modulus, GPa | 81 | |
| 76 |
| Shear Strength, MPa | 570 | |
| 540 to 590 |
| Tensile Strength: Ultimate (UTS), MPa | 850 | |
| 870 to 980 |
| Tensile Strength: Yield (Proof), MPa | 390 | |
| 470 to 780 |
Thermal Properties
| Latent Heat of Fusion, J/g | 300 | |
| 270 |
| Maximum Temperature: Corrosion, °C | 570 | |
| 380 |
| Maximum Temperature: Mechanical, °C | 1100 | |
| 740 |
| Melting Completion (Liquidus), °C | 1470 | |
| 1450 |
| Melting Onset (Solidus), °C | 1420 | |
| 1410 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 480 |
| Thermal Conductivity, W/m-K | 12 | |
| 24 |
| Thermal Expansion, µm/m-K | 14 | |
| 11 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 80 | |
| 8.0 |
| Density, g/cm3 | 8.5 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 9.7 | |
| 2.9 |
| Embodied Energy, MJ/kg | 150 | |
| 41 |
| Embodied Water, L/kg | 300 | |
| 100 |
Common Calculations
| PREN (Pitting Resistance) | 37 | |
| 15 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 230 | |
| 110 to 150 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 370 | |
| 570 to 1580 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 23 | |
| 25 |
| Strength to Weight: Axial, points | 28 | |
| 31 to 35 |
| Strength to Weight: Bending, points | 24 | |
| 26 to 28 |
| Thermal Diffusivity, mm2/s | 3.2 | |
| 6.5 |
| Thermal Shock Resistance, points | 21 | |
| 30 to 34 |
Alloy Composition
| Carbon (C), % | 0.080 to 0.16 | |
| 0.18 to 0.24 |
| Chromium (Cr), % | 20 to 22.5 | |
| 11 to 12.5 |
| Cobalt (Co), % | 18.5 to 21 | |
| 0 |
| Iron (Fe), % | 24.3 to 36.2 | |
| 83.5 to 87.1 |
| Manganese (Mn), % | 1.0 to 2.0 | |
| 0.4 to 0.9 |
| Molybdenum (Mo), % | 2.5 to 3.5 | |
| 0.8 to 1.2 |
| Nickel (Ni), % | 19 to 21 | |
| 0.3 to 0.8 |
| Niobium (Nb), % | 0.75 to 1.3 | |
| 0 |
| Nitrogen (N), % | 0 to 0.2 | |
| 0 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.025 |
| 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 |
| Vanadium (V), % | 0 | |
| 0.25 to 0.35 |