S17600 Stainless Steel vs. R30155 Cobalt
Both S17600 stainless steel and R30155 cobalt are iron alloys. They have 55% 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 S17600 stainless steel and the bottom bar is R30155 cobalt.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 270 to 410 | |
| 220 |
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 210 |
| Elongation at Break, % | 8.6 to 11 | |
| 34 |
| Fatigue Strength, MPa | 300 to 680 | |
| 310 |
| Poisson's Ratio | 0.28 | |
| 0.29 |
| Reduction in Area, % | 28 to 50 | |
| 34 |
| Shear Modulus, GPa | 76 | |
| 81 |
| Shear Strength, MPa | 560 to 880 | |
| 570 |
| Tensile Strength: Ultimate (UTS), MPa | 940 to 1490 | |
| 850 |
| Tensile Strength: Yield (Proof), MPa | 580 to 1310 | |
| 390 |
Thermal Properties
| Latent Heat of Fusion, J/g | 290 | |
| 300 |
| Maximum Temperature: Corrosion, °C | 550 | |
| 570 |
| Maximum Temperature: Mechanical, °C | 890 | |
| 1100 |
| Melting Completion (Liquidus), °C | 1430 | |
| 1470 |
| Melting Onset (Solidus), °C | 1390 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 450 |
| Thermal Conductivity, W/m-K | 15 | |
| 12 |
| Thermal Expansion, µm/m-K | 11 | |
| 14 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 13 | |
| 80 |
| Density, g/cm3 | 7.8 | |
| 8.5 |
| Embodied Carbon, kg CO2/kg material | 2.9 | |
| 9.7 |
| Embodied Energy, MJ/kg | 42 | |
| 150 |
| Embodied Water, L/kg | 130 | |
| 300 |
Common Calculations
| PREN (Pitting Resistance) | 17 | |
| 37 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 70 to 150 | |
| 230 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 850 to 4390 | |
| 370 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 23 |
| Strength to Weight: Axial, points | 34 to 54 | |
| 28 |
| Strength to Weight: Bending, points | 28 to 37 | |
| 24 |
| Thermal Diffusivity, mm2/s | 4.1 | |
| 3.2 |
| Thermal Shock Resistance, points | 31 to 50 | |
| 21 |
Alloy Composition
| Aluminum (Al), % | 0 to 0.4 | |
| 0 |
| Carbon (C), % | 0 to 0.080 | |
| 0.080 to 0.16 |
| Chromium (Cr), % | 16 to 17.5 | |
| 20 to 22.5 |
| Cobalt (Co), % | 0 | |
| 18.5 to 21 |
| Iron (Fe), % | 71.3 to 77.6 | |
| 24.3 to 36.2 |
| Manganese (Mn), % | 0 to 1.0 | |
| 1.0 to 2.0 |
| Molybdenum (Mo), % | 0 | |
| 2.5 to 3.5 |
| Nickel (Ni), % | 6.0 to 7.5 | |
| 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), % | 0 to 1.0 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.030 |
| Tantalum (Ta), % | 0 | |
| 0.75 to 1.3 |
| Titanium (Ti), % | 0.4 to 1.2 | |
| 0 |
| Tungsten (W), % | 0 | |
| 2.0 to 3.0 |