ASTM A217 Cast Steel vs. R31539 Cobalt
ASTM A217 cast steel belongs to the iron alloys classification, while R31539 cobalt belongs to the cobalt alloys. There are 28 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.
For each property being compared, the top bar is ASTM A217 cast steel and the bottom bar is R31539 cobalt.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 220 |
| Elongation at Break, % | 21 to 27 | |
| 13 to 22 |
| Fatigue Strength, MPa | 200 to 320 | |
| 310 to 480 |
| Poisson's Ratio | 0.28 to 0.29 | |
| 0.29 |
| Reduction in Area, % | 39 to 50 | |
| 13 to 23 |
| Shear Modulus, GPa | 73 to 75 | |
| 86 |
| Tensile Strength: Ultimate (UTS), MPa | 540 to 710 | |
| 1000 to 1340 |
| Tensile Strength: Yield (Proof), MPa | 270 to 460 | |
| 590 to 940 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 to 270 | |
| 320 |
| Melting Completion (Liquidus), °C | 1450 to 1460 | |
| 1360 |
| Melting Onset (Solidus), °C | 1410 to 1420 | |
| 1290 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 450 |
| Thermal Conductivity, W/m-K | 26 to 50 | |
| 13 |
| Thermal Expansion, µm/m-K | 13 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.3 to 9.2 | |
| 2.0 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.4 to 11 | |
| 2.1 |
Otherwise Unclassified Properties
| Density, g/cm3 | 7.8 | |
| 8.4 |
| Embodied Carbon, kg CO2/kg material | 1.5 to 2.1 | |
| 8.2 |
| Embodied Energy, MJ/kg | 20 to 28 | |
| 110 |
| Embodied Water, L/kg | 47 to 87 | |
| 530 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 110 to 130 | |
| 140 to 190 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 190 to 570 | |
| 780 to 2000 |
| Stiffness to Weight: Axial, points | 13 to 14 | |
| 15 |
| Stiffness to Weight: Bending, points | 24 to 25 | |
| 24 |
| Strength to Weight: Axial, points | 19 to 25 | |
| 33 to 44 |
| Strength to Weight: Bending, points | 19 to 23 | |
| 27 to 32 |
| Thermal Diffusivity, mm2/s | 6.9 to 14 | |
| 3.5 |
| Thermal Shock Resistance, points | 16 to 20 | |
| 24 to 32 |