R30605 Cobalt vs. ASTM A302 Alloy Steel
R30605 cobalt belongs to the cobalt alloys classification, while ASTM A302 alloy steel belongs to the iron alloys. There are 25 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.
For each property being compared, the top bar is R30605 cobalt and the bottom bar is ASTM A302 alloy steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 190 |
| Elongation at Break, % | 34 | |
| 20 to 23 |
| Fatigue Strength, MPa | 260 to 590 | |
| 250 to 280 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 81 | |
| 73 |
| Tensile Strength: Ultimate (UTS), MPa | 1130 to 1900 | |
| 590 to 620 |
| Tensile Strength: Yield (Proof), MPa | 470 to 1600 | |
| 350 to 390 |
Thermal Properties
| Latent Heat of Fusion, J/g | 290 | |
| 250 |
| Melting Completion (Liquidus), °C | 1410 | |
| 1460 |
| Melting Onset (Solidus), °C | 1330 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 410 | |
| 470 |
| Thermal Conductivity, W/m-K | 9.6 | |
| 39 to 51 |
| Thermal Expansion, µm/m-K | 12 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.0 | |
| 7.2 to 7.4 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 1.8 | |
| 8.2 to 8.4 |
Otherwise Unclassified Properties
| Density, g/cm3 | 9.6 | |
| 7.8 to 7.9 |
| Embodied Carbon, kg CO2/kg material | 9.8 | |
| 1.5 to 1.6 |
| Embodied Energy, MJ/kg | 140 | |
| 20 to 21 |
| Embodied Water, L/kg | 450 | |
| 48 to 50 |
Common Calculations
| Stiffness to Weight: Axial, points | 12 | |
| 13 |
| Stiffness to Weight: Bending, points | 21 | |
| 24 |
| Strength to Weight: Axial, points | 33 to 55 | |
| 21 to 22 |
| Strength to Weight: Bending, points | 25 to 36 | |
| 20 to 21 |
| Thermal Diffusivity, mm2/s | 2.5 | |
| 10 to 14 |
| Thermal Shock Resistance, points | 31 to 52 | |
| 17 to 18 |