85-silver 15-nickel vs. R30021 Cobalt
85-silver 15-nickel belongs to the otherwise unclassified metals classification, while R30021 cobalt belongs to the cobalt alloys. There are 17 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.
For each property being compared, the top bar is 85-silver 15-nickel and the bottom bar is R30021 cobalt.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 88 | |
| 220 |
| Poisson's Ratio | 0.36 | |
| 0.29 |
| Shear Modulus, GPa | 32 | |
| 86 |
| Tensile Strength: Ultimate (UTS), MPa | 260 to 470 | |
| 700 |
Thermal Properties
| Latent Heat of Fusion, J/g | 140 | |
| 330 |
| Melting Completion (Liquidus), °C | 870 | |
| 1350 |
| Melting Onset (Solidus), °C | 960 | |
| 1190 |
| Specific Heat Capacity, J/kg-K | 270 | |
| 450 |
| Thermal Expansion, µm/m-K | 18 | |
| 11 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 86 | |
| 1.9 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 75 | |
| 2.1 |
Otherwise Unclassified Properties
| Density, g/cm3 | 10 | |
| 8.4 |
Common Calculations
| Stiffness to Weight: Axial, points | 4.8 | |
| 15 |
| Stiffness to Weight: Bending, points | 14 | |
| 24 |
| Strength to Weight: Axial, points | 7.1 to 13 | |
| 23 |
| Strength to Weight: Bending, points | 8.9 to 13 | |
| 21 |
| Thermal Shock Resistance, points | 12 to 21 | |
| 21 |
Alloy Composition
| Carbon (C), % | 0 | |
| 0.2 to 0.35 |
| Chromium (Cr), % | 0 | |
| 26 to 29 |
| Cobalt (Co), % | 0 | |
| 61.7 to 67.3 |
| Iron (Fe), % | 0 | |
| 0 to 3.0 |
| Molybdenum (Mo), % | 0 | |
| 4.5 to 6.0 |
| Nickel (Ni), % | 13.8 to 16 | |
| 2.0 to 3.0 |
| Silicon (Si), % | 0 | |
| 0 to 1.5 |
| Silver (Ag), % | 84 to 86 | |
| 0 |
| Residuals, % | 0 to 0.2 | |
| 0 |