R30155 Cobalt vs. S13800 Stainless Steel
Both R30155 cobalt and S13800 stainless steel are iron alloys. They have 54% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.
For each property being compared, the top bar is R30155 cobalt and the bottom bar is S13800 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 220 | |
| 290 to 480 |
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 200 |
| Elongation at Break, % | 34 | |
| 11 to 18 |
| Fatigue Strength, MPa | 310 | |
| 410 to 870 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Reduction in Area, % | 34 | |
| 39 to 62 |
| Shear Modulus, GPa | 81 | |
| 77 |
| Shear Strength, MPa | 570 | |
| 610 to 1030 |
| Tensile Strength: Ultimate (UTS), MPa | 850 | |
| 980 to 1730 |
| Tensile Strength: Yield (Proof), MPa | 390 | |
| 660 to 1580 |
Thermal Properties
| Latent Heat of Fusion, J/g | 300 | |
| 280 |
| Maximum Temperature: Corrosion, °C | 570 | |
| 390 |
| Maximum Temperature: Mechanical, °C | 1100 | |
| 810 |
| Melting Completion (Liquidus), °C | 1470 | |
| 1450 |
| Melting Onset (Solidus), °C | 1420 | |
| 1410 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 470 |
| Thermal Conductivity, W/m-K | 12 | |
| 16 |
| Thermal Expansion, µm/m-K | 14 | |
| 11 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 80 | |
| 15 |
| Density, g/cm3 | 8.5 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 9.7 | |
| 3.4 |
| Embodied Energy, MJ/kg | 150 | |
| 46 |
| Embodied Water, L/kg | 300 | |
| 140 |
Common Calculations
| PREN (Pitting Resistance) | 37 | |
| 21 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 230 | |
| 150 to 190 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 370 | |
| 1090 to 5490 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 23 | |
| 25 |
| Strength to Weight: Axial, points | 28 | |
| 35 to 61 |
| Strength to Weight: Bending, points | 24 | |
| 28 to 41 |
| Thermal Diffusivity, mm2/s | 3.2 | |
| 4.3 |
| Thermal Shock Resistance, points | 21 | |
| 33 to 58 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 0.9 to 1.4 |
| Carbon (C), % | 0.080 to 0.16 | |
| 0 to 0.050 |
| Chromium (Cr), % | 20 to 22.5 | |
| 12.3 to 13.2 |
| Cobalt (Co), % | 18.5 to 21 | |
| 0 |
| Iron (Fe), % | 24.3 to 36.2 | |
| 73.6 to 77.3 |
| Manganese (Mn), % | 1.0 to 2.0 | |
| 0 to 0.2 |
| Molybdenum (Mo), % | 2.5 to 3.5 | |
| 2.0 to 3.0 |
| Nickel (Ni), % | 19 to 21 | |
| 7.5 to 8.5 |
| Niobium (Nb), % | 0.75 to 1.3 | |
| 0 |
| Nitrogen (N), % | 0 to 0.2 | |
| 0 to 0.010 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.010 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 0.1 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.0080 |
| Tantalum (Ta), % | 0.75 to 1.3 | |
| 0 |
| Tungsten (W), % | 2.0 to 3.0 | |
| 0 |