R30155 Cobalt vs. ASTM B522 Class I
R30155 cobalt belongs to the iron alloys classification, while ASTM B522 class I belongs to the otherwise unclassified metals. There are 20 material properties with values for both materials. Properties with values for just one material (15, in this case) are not shown.
For each property being compared, the top bar is R30155 cobalt and the bottom bar is ASTM B522 class I.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 96 |
| Elongation at Break, % | 34 | |
| 1.1 to 29 |
| Poisson's Ratio | 0.29 | |
| 0.41 |
| Shear Modulus, GPa | 81 | |
| 34 |
| Shear Strength, MPa | 570 | |
| 180 to 280 |
| Tensile Strength: Ultimate (UTS), MPa | 850 | |
| 280 to 490 |
| Tensile Strength: Yield (Proof), MPa | 390 | |
| 120 to 210 |
Thermal Properties
| Latent Heat of Fusion, J/g | 300 | |
| 77 |
| Melting Completion (Liquidus), °C | 1470 | |
| 1030 |
| Melting Onset (Solidus), °C | 1420 | |
| 1030 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 160 |
| Thermal Expansion, µm/m-K | 14 | |
| 15 |
Otherwise Unclassified Properties
| Density, g/cm3 | 8.5 | |
| 17 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 230 | |
| 4.5 to 64 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 370 | |
| 75 to 230 |
| Stiffness to Weight: Axial, points | 14 | |
| 3.1 |
| Stiffness to Weight: Bending, points | 23 | |
| 8.9 |
| Strength to Weight: Axial, points | 28 | |
| 4.4 to 7.8 |
| Strength to Weight: Bending, points | 24 | |
| 5.5 to 8.0 |
| Thermal Shock Resistance, points | 21 | |
| 13 to 24 |
Alloy Composition
| Carbon (C), % | 0.080 to 0.16 | |
| 0 |
| Chromium (Cr), % | 20 to 22.5 | |
| 0 |
| Cobalt (Co), % | 18.5 to 21 | |
| 0 |
| Gold (Au), % | 0 | |
| 68 to 70 |
| Iron (Fe), % | 24.3 to 36.2 | |
| 0 |
| Manganese (Mn), % | 1.0 to 2.0 | |
| 0 |
| Molybdenum (Mo), % | 2.5 to 3.5 | |
| 0 |
| Nickel (Ni), % | 19 to 21 | |
| 0 |
| Niobium (Nb), % | 0.75 to 1.3 | |
| 0 |
| Nitrogen (N), % | 0 to 0.2 | |
| 0 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 |
| Platinum (Pt), % | 0 | |
| 5.0 to 7.0 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 |
| Silver (Ag), % | 0 | |
| 23.5 to 26.5 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 |
| Tantalum (Ta), % | 0.75 to 1.3 | |
| 0 |
| Tungsten (W), % | 2.0 to 3.0 | |
| 0 |
| Residuals, % | 0 | |
| 0 to 0.35 |