AISI 205 Stainless Steel vs. R30035 Cobalt
AISI 205 stainless steel belongs to the iron alloys classification, while R30035 cobalt belongs to the cobalt alloys. There are 24 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.
For each property being compared, the top bar is AISI 205 stainless steel and the bottom bar is R30035 cobalt.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 220 to 230 |
| Elongation at Break, % | 11 to 51 | |
| 9.0 to 46 |
| Fatigue Strength, MPa | 410 to 640 | |
| 170 to 740 |
| Poisson's Ratio | 0.28 | |
| 0.29 |
| Shear Modulus, GPa | 77 | |
| 84 to 89 |
| Tensile Strength: Ultimate (UTS), MPa | 800 to 1430 | |
| 900 to 1900 |
| Tensile Strength: Yield (Proof), MPa | 450 to 1100 | |
| 300 to 1650 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 320 |
| Melting Completion (Liquidus), °C | 1380 | |
| 1440 |
| Melting Onset (Solidus), °C | 1340 | |
| 1320 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 440 |
| Thermal Expansion, µm/m-K | 18 | |
| 13 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 11 | |
| 100 |
| Density, g/cm3 | 7.6 | |
| 8.7 |
| Embodied Carbon, kg CO2/kg material | 2.6 | |
| 10 |
| Embodied Energy, MJ/kg | 37 | |
| 140 |
| Embodied Water, L/kg | 150 | |
| 410 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 150 to 430 | |
| 160 to 320 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 510 to 3060 | |
| 210 to 5920 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 to 15 |
| Stiffness to Weight: Bending, points | 26 | |
| 23 to 24 |
| Strength to Weight: Axial, points | 29 to 52 | |
| 29 to 61 |
| Strength to Weight: Bending, points | 25 to 37 | |
| 24 to 39 |
| Thermal Shock Resistance, points | 16 to 29 | |
| 23 to 46 |
Alloy Composition
| Boron (B), % | 0 | |
| 0 to 0.015 |
| Carbon (C), % | 0.12 to 0.25 | |
| 0 to 0.025 |
| Chromium (Cr), % | 16.5 to 18.5 | |
| 19 to 21 |
| Cobalt (Co), % | 0 | |
| 29.1 to 39 |
| Iron (Fe), % | 62.6 to 68.1 | |
| 0 to 1.0 |
| Manganese (Mn), % | 14 to 15.5 | |
| 0 to 0.15 |
| Molybdenum (Mo), % | 0 | |
| 9.0 to 10.5 |
| Nickel (Ni), % | 1.0 to 1.7 | |
| 33 to 37 |
| Nitrogen (N), % | 0.32 to 0.4 | |
| 0 |
| Phosphorus (P), % | 0 to 0.060 | |
| 0 to 0.015 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 0.15 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.010 |
| Titanium (Ti), % | 0 | |
| 0 to 1.0 |