R30075 Cobalt vs. K94200 Alloy
R30075 cobalt belongs to the cobalt alloys classification, while K94200 alloy belongs to the iron alloys. There are 21 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.
For each property being compared, the top bar is R30075 cobalt and the bottom bar is K94200 alloy.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 210 to 250 | |
| 140 |
| Elongation at Break, % | 12 | |
| 5.0 to 32 |
| Poisson's Ratio | 0.29 | |
| 0.34 |
| Shear Modulus, GPa | 82 to 98 | |
| 54 |
| Tensile Strength: Ultimate (UTS), MPa | 780 to 1280 | |
| 500 to 710 |
| Tensile Strength: Yield (Proof), MPa | 480 to 840 | |
| 270 to 650 |
Thermal Properties
| Melting Onset (Solidus), °C | 1290 | |
| 1440 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 500 |
| Thermal Conductivity, W/m-K | 13 | |
| 15 |
| Thermal Expansion, µm/m-K | 12 | |
| 5.0 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.0 | |
| 2.7 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.1 | |
| 3.0 |
Otherwise Unclassified Properties
| Density, g/cm3 | 8.4 | |
| 8.2 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 84 to 140 | |
| 35 to 130 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 560 to 1410 | |
| 250 to 1460 |
| Stiffness to Weight: Axial, points | 14 to 17 | |
| 9.8 |
| Stiffness to Weight: Bending, points | 24 to 25 | |
| 21 |
| Strength to Weight: Axial, points | 26 to 42 | |
| 17 to 24 |
| Strength to Weight: Bending, points | 22 to 31 | |
| 17 to 22 |
| Thermal Diffusivity, mm2/s | 3.5 | |
| 3.7 |
| Thermal Shock Resistance, points | 21 to 29 | |
| 49 to 70 |