R30155 Cobalt vs. ASTM A182 Grade F23
Both R30155 cobalt and ASTM A182 grade F23 are iron alloys. They have a modest 35% of their average alloy composition in common, which, by itself, doesn't mean much. There are 31 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 ASTM A182 grade F23.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 220 | |
| 190 |
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 190 |
| Elongation at Break, % | 34 | |
| 22 |
| Fatigue Strength, MPa | 310 | |
| 320 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Reduction in Area, % | 34 | |
| 46 |
| Shear Modulus, GPa | 81 | |
| 74 |
| Shear Strength, MPa | 570 | |
| 360 |
| Tensile Strength: Ultimate (UTS), MPa | 850 | |
| 570 |
| Tensile Strength: Yield (Proof), MPa | 390 | |
| 460 |
Thermal Properties
| Latent Heat of Fusion, J/g | 300 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 1100 | |
| 450 |
| Melting Completion (Liquidus), °C | 1470 | |
| 1500 |
| Melting Onset (Solidus), °C | 1420 | |
| 1450 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 470 |
| Thermal Conductivity, W/m-K | 12 | |
| 41 |
| Thermal Expansion, µm/m-K | 14 | |
| 13 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 80 | |
| 7.0 |
| Density, g/cm3 | 8.5 | |
| 8.0 |
| Embodied Carbon, kg CO2/kg material | 9.7 | |
| 2.5 |
| Embodied Energy, MJ/kg | 150 | |
| 36 |
| Embodied Water, L/kg | 300 | |
| 59 |
Common Calculations
| PREN (Pitting Resistance) | 37 | |
| 5.7 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 230 | |
| 120 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 370 | |
| 550 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 23 | |
| 24 |
| Strength to Weight: Axial, points | 28 | |
| 20 |
| Strength to Weight: Bending, points | 24 | |
| 19 |
| Thermal Diffusivity, mm2/s | 3.2 | |
| 11 |
| Thermal Shock Resistance, points | 21 | |
| 17 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 0 to 0.030 |
| Boron (B), % | 0 | |
| 0.0010 to 0.0060 |
| Carbon (C), % | 0.080 to 0.16 | |
| 0.040 to 0.1 |
| Chromium (Cr), % | 20 to 22.5 | |
| 1.9 to 2.6 |
| Cobalt (Co), % | 18.5 to 21 | |
| 0 |
| Iron (Fe), % | 24.3 to 36.2 | |
| 93.2 to 96.2 |
| Manganese (Mn), % | 1.0 to 2.0 | |
| 0.1 to 0.6 |
| Molybdenum (Mo), % | 2.5 to 3.5 | |
| 0.050 to 0.3 |
| Nickel (Ni), % | 19 to 21 | |
| 0 to 0.4 |
| Niobium (Nb), % | 0.75 to 1.3 | |
| 0.020 to 0.080 |
| Nitrogen (N), % | 0 to 0.2 | |
| 0 to 0.015 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.030 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 0.5 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.010 |
| Tantalum (Ta), % | 0.75 to 1.3 | |
| 0 |
| Titanium (Ti), % | 0 | |
| 0.0050 to 0.060 |
| Tungsten (W), % | 2.0 to 3.0 | |
| 1.5 to 1.8 |
| Vanadium (V), % | 0 | |
| 0.2 to 0.3 |