R30155 Cobalt vs. AISI 403 Stainless Steel
Both R30155 cobalt and AISI 403 stainless steel are iron alloys. They have 44% 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 AISI 403 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 220 | |
| 190 to 240 |
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 190 |
| Elongation at Break, % | 34 | |
| 16 to 25 |
| Fatigue Strength, MPa | 310 | |
| 200 to 340 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Reduction in Area, % | 34 | |
| 47 to 50 |
| Shear Modulus, GPa | 81 | |
| 76 |
| Shear Strength, MPa | 570 | |
| 340 to 480 |
| Tensile Strength: Ultimate (UTS), MPa | 850 | |
| 530 to 780 |
| Tensile Strength: Yield (Proof), MPa | 390 | |
| 280 to 570 |
Thermal Properties
| Latent Heat of Fusion, J/g | 300 | |
| 270 |
| Maximum Temperature: Corrosion, °C | 570 | |
| 390 |
| Maximum Temperature: Mechanical, °C | 1100 | |
| 740 |
| Melting Completion (Liquidus), °C | 1470 | |
| 1450 |
| Melting Onset (Solidus), °C | 1420 | |
| 1400 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 480 |
| Thermal Conductivity, W/m-K | 12 | |
| 28 |
| Thermal Expansion, µm/m-K | 14 | |
| 9.9 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 80 | |
| 6.5 |
| Density, g/cm3 | 8.5 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 9.7 | |
| 1.9 |
| Embodied Energy, MJ/kg | 150 | |
| 27 |
| Embodied Water, L/kg | 300 | |
| 99 |
Common Calculations
| PREN (Pitting Resistance) | 37 | |
| 12 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 230 | |
| 110 to 120 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 370 | |
| 210 to 840 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 23 | |
| 25 |
| Strength to Weight: Axial, points | 28 | |
| 19 to 28 |
| Strength to Weight: Bending, points | 24 | |
| 19 to 24 |
| Thermal Diffusivity, mm2/s | 3.2 | |
| 7.6 |
| Thermal Shock Resistance, points | 21 | |
| 20 to 29 |
Alloy Composition
| Carbon (C), % | 0.080 to 0.16 | |
| 0 to 0.15 |
| Chromium (Cr), % | 20 to 22.5 | |
| 11.5 to 13 |
| Cobalt (Co), % | 18.5 to 21 | |
| 0 |
| Iron (Fe), % | 24.3 to 36.2 | |
| 84.7 to 88.5 |
| Manganese (Mn), % | 1.0 to 2.0 | |
| 0 to 1.0 |
| Molybdenum (Mo), % | 2.5 to 3.5 | |
| 0 |
| Nickel (Ni), % | 19 to 21 | |
| 0 to 0.6 |
| Niobium (Nb), % | 0.75 to 1.3 | |
| 0 |
| Nitrogen (N), % | 0 to 0.2 | |
| 0 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 0.5 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.030 |
| Tantalum (Ta), % | 0.75 to 1.3 | |
| 0 |
| Tungsten (W), % | 2.0 to 3.0 | |
| 0 |