R30155 Cobalt vs. Commercially Pure Silver
R30155 cobalt belongs to the iron alloys classification, while commercially pure silver belongs to the otherwise unclassified metals. There are 19 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 commercially pure silver.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 71 |
| Elongation at Break, % | 34 | |
| 1.1 to 29 |
| Poisson's Ratio | 0.29 | |
| 0.37 |
| Shear Modulus, GPa | 81 | |
| 26 |
| Shear Strength, MPa | 570 | |
| 120 to 190 |
| Tensile Strength: Ultimate (UTS), MPa | 850 | |
| 190 to 340 |
Thermal Properties
| Latent Heat of Fusion, J/g | 300 | |
| 110 |
| Melting Completion (Liquidus), °C | 1470 | |
| 960 |
| Melting Onset (Solidus), °C | 1420 | |
| 960 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 240 |
| Thermal Conductivity, W/m-K | 12 | |
| 420 |
| Thermal Expansion, µm/m-K | 14 | |
| 20 |
Otherwise Unclassified Properties
| Density, g/cm3 | 8.5 | |
| 10 |
Common Calculations
| Stiffness to Weight: Axial, points | 14 | |
| 3.8 |
| Stiffness to Weight: Bending, points | 23 | |
| 13 |
| Strength to Weight: Axial, points | 28 | |
| 4.9 to 8.9 |
| Strength to Weight: Bending, points | 24 | |
| 6.9 to 10 |
| Thermal Diffusivity, mm2/s | 3.2 | |
| 170 |
| Thermal Shock Resistance, points | 21 | |
| 9.5 to 17 |
Alloy Composition
| Carbon (C), % | 0.080 to 0.16 | |
| 0 |
| Chromium (Cr), % | 20 to 22.5 | |
| 0 |
| Cobalt (Co), % | 18.5 to 21 | |
| 0 |
| 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 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 |
| Silver (Ag), % | 0 | |
| 99.9 to 100 |
| 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 0.1 |