ASTM A266 Carbon Steel vs. R30155 Cobalt
Both ASTM A266 carbon steel and R30155 cobalt are iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.
For each property being compared, the top bar is ASTM A266 carbon steel and the bottom bar is R30155 cobalt.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 150 to 180 | |
| 220 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 210 |
| Elongation at Break, % | 21 to 26 | |
| 34 |
| Fatigue Strength, MPa | 170 to 200 | |
| 310 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Reduction in Area, % | 34 to 43 | |
| 34 |
| Shear Modulus, GPa | 73 | |
| 81 |
| Shear Strength, MPa | 320 to 380 | |
| 570 |
| Tensile Strength: Ultimate (UTS), MPa | 500 to 600 | |
| 850 |
| Tensile Strength: Yield (Proof), MPa | 230 to 290 | |
| 390 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 300 |
| Maximum Temperature: Mechanical, °C | 400 | |
| 1100 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1470 |
| Melting Onset (Solidus), °C | 1420 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 450 |
| Thermal Conductivity, W/m-K | 51 to 52 | |
| 12 |
| Thermal Expansion, µm/m-K | 12 | |
| 14 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 1.8 | |
| 80 |
| Density, g/cm3 | 7.8 | |
| 8.5 |
| Embodied Carbon, kg CO2/kg material | 1.4 | |
| 9.7 |
| Embodied Energy, MJ/kg | 18 to 19 | |
| 150 |
| Embodied Water, L/kg | 46 to 47 | |
| 300 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 110 | |
| 230 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 140 to 230 | |
| 370 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 24 | |
| 23 |
| Strength to Weight: Axial, points | 18 to 21 | |
| 28 |
| Strength to Weight: Bending, points | 18 to 20 | |
| 24 |
| Thermal Diffusivity, mm2/s | 14 | |
| 3.2 |
| Thermal Shock Resistance, points | 16 to 19 | |
| 21 |