R30155 Cobalt vs. EN 1.4477 Stainless Steel
Both R30155 cobalt and EN 1.4477 stainless steel are iron alloys. They have 62% 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 1.4477 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 220 | |
| 270 |
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 210 |
| Elongation at Break, % | 34 | |
| 22 to 23 |
| Fatigue Strength, MPa | 310 | |
| 420 to 490 |
| Poisson's Ratio | 0.29 | |
| 0.27 |
| Shear Modulus, GPa | 81 | |
| 81 |
| Shear Strength, MPa | 570 | |
| 550 to 580 |
| Tensile Strength: Ultimate (UTS), MPa | 850 | |
| 880 to 930 |
| Tensile Strength: Yield (Proof), MPa | 390 | |
| 620 to 730 |
Thermal Properties
| Latent Heat of Fusion, J/g | 300 | |
| 300 |
| Maximum Temperature: Corrosion, °C | 570 | |
| 460 |
| Maximum Temperature: Mechanical, °C | 1100 | |
| 1100 |
| Melting Completion (Liquidus), °C | 1470 | |
| 1430 |
| Melting Onset (Solidus), °C | 1420 | |
| 1380 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 480 |
| Thermal Conductivity, W/m-K | 12 | |
| 13 |
| Thermal Expansion, µm/m-K | 14 | |
| 13 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 80 | |
| 20 |
| Density, g/cm3 | 8.5 | |
| 7.7 |
| Embodied Carbon, kg CO2/kg material | 9.7 | |
| 3.7 |
| Embodied Energy, MJ/kg | 150 | |
| 52 |
| Embodied Water, L/kg | 300 | |
| 190 |
Common Calculations
| PREN (Pitting Resistance) | 37 | |
| 41 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 230 | |
| 180 to 190 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 370 | |
| 940 to 1290 |
| Stiffness to Weight: Axial, points | 14 | |
| 15 |
| Stiffness to Weight: Bending, points | 23 | |
| 25 |
| Strength to Weight: Axial, points | 28 | |
| 31 to 33 |
| Strength to Weight: Bending, points | 24 | |
| 26 to 27 |
| Thermal Diffusivity, mm2/s | 3.2 | |
| 3.5 |
| Thermal Shock Resistance, points | 21 | |
| 23 to 25 |
Alloy Composition
| Carbon (C), % | 0.080 to 0.16 | |
| 0 to 0.030 |
| Chromium (Cr), % | 20 to 22.5 | |
| 28 to 30 |
| Cobalt (Co), % | 18.5 to 21 | |
| 0 |
| Copper (Cu), % | 0 | |
| 0 to 0.8 |
| Iron (Fe), % | 24.3 to 36.2 | |
| 56.6 to 63.6 |
| Manganese (Mn), % | 1.0 to 2.0 | |
| 0.8 to 1.5 |
| Molybdenum (Mo), % | 2.5 to 3.5 | |
| 1.5 to 2.6 |
| Nickel (Ni), % | 19 to 21 | |
| 5.8 to 7.5 |
| Niobium (Nb), % | 0.75 to 1.3 | |
| 0 |
| Nitrogen (N), % | 0 to 0.2 | |
| 0.3 to 0.4 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.030 |
| 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 |