EN 1.4729 Stainless Steel vs. R30155 Cobalt
Both EN 1.4729 stainless steel and R30155 cobalt are iron alloys. They have 45% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.
For each property being compared, the top bar is EN 1.4729 stainless steel and the bottom bar is R30155 cobalt.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 260 | |
| 220 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 210 |
| Elongation at Break, % | 15 | |
| 34 |
| Poisson's Ratio | 0.28 | |
| 0.29 |
| Shear Modulus, GPa | 75 | |
| 81 |
Thermal Properties
| Latent Heat of Fusion, J/g | 300 | |
| 300 |
| Maximum Temperature: Corrosion, °C | 390 | |
| 570 |
| Maximum Temperature: Mechanical, °C | 850 | |
| 1100 |
| Melting Completion (Liquidus), °C | 1420 | |
| 1470 |
| Melting Onset (Solidus), °C | 1380 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 490 | |
| 450 |
| Thermal Conductivity, W/m-K | 24 | |
| 12 |
| Thermal Expansion, µm/m-K | 10 | |
| 14 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 7.5 | |
| 80 |
| Density, g/cm3 | 7.6 | |
| 8.5 |
| Embodied Carbon, kg CO2/kg material | 2.1 | |
| 9.7 |
| Embodied Energy, MJ/kg | 29 | |
| 150 |
| Embodied Water, L/kg | 100 | |
| 300 |
Common Calculations
| PREN (Pitting Resistance) | 14 | |
| 37 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 23 |
| Thermal Diffusivity, mm2/s | 6.5 | |
| 3.2 |
Alloy Composition
| Carbon (C), % | 0.3 to 0.5 | |
| 0.080 to 0.16 |
| Chromium (Cr), % | 12 to 14 | |
| 20 to 22.5 |
| Cobalt (Co), % | 0 | |
| 18.5 to 21 |
| Iron (Fe), % | 80.4 to 86.7 | |
| 24.3 to 36.2 |
| Manganese (Mn), % | 0 to 1.0 | |
| 1.0 to 2.0 |
| Molybdenum (Mo), % | 0 to 0.5 | |
| 2.5 to 3.5 |
| Nickel (Ni), % | 0 to 1.0 | |
| 19 to 21 |
| Niobium (Nb), % | 0 | |
| 0.75 to 1.3 |
| Nitrogen (N), % | 0 | |
| 0 to 0.2 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.040 |
| Silicon (Si), % | 1.0 to 2.5 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.030 |
| Tantalum (Ta), % | 0 | |
| 0.75 to 1.3 |
| Tungsten (W), % | 0 | |
| 2.0 to 3.0 |