R30035 Cobalt vs. ASTM B628 Ag-Cu
R30035 cobalt belongs to the cobalt alloys classification, while ASTM B628 Ag-Cu belongs to the otherwise unclassified metals. There are 18 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 R30035 cobalt and the bottom bar is ASTM B628 Ag-Cu.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 220 to 230 | |
| 83 |
| Elongation at Break, % | 9.0 to 46 | |
| 1.1 to 17 |
| Poisson's Ratio | 0.29 | |
| 0.36 |
| Shear Modulus, GPa | 84 to 89 | |
| 31 |
| Tensile Strength: Ultimate (UTS), MPa | 900 to 1900 | |
| 350 to 760 |
Thermal Properties
| Latent Heat of Fusion, J/g | 320 | |
| 140 |
| Melting Completion (Liquidus), °C | 1440 | |
| 780 |
| Melting Onset (Solidus), °C | 1320 | |
| 780 |
| Specific Heat Capacity, J/kg-K | 440 | |
| 280 |
| Thermal Expansion, µm/m-K | 13 | |
| 19 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 1.7 | |
| 84 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 1.8 | |
| 75 |
Otherwise Unclassified Properties
| Density, g/cm3 | 8.7 | |
| 10 |
Common Calculations
| Stiffness to Weight: Axial, points | 14 to 15 | |
| 4.6 |
| Stiffness to Weight: Bending, points | 23 to 24 | |
| 14 |
| Strength to Weight: Axial, points | 29 to 61 | |
| 9.5 to 21 |
| Strength to Weight: Bending, points | 24 to 39 | |
| 11 to 18 |
| Thermal Shock Resistance, points | 23 to 46 | |
| 16 to 34 |
Alloy Composition
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| Aluminum (Al), % | 0 | |
| 0 to 0.0050 |
| Boron (B), % | 0 to 0.015 | |
| 0 |
| Cadmium (Cd), % | 0 | |
| 0 to 0.050 |
| Carbon (C), % | 0 to 0.025 | |
| 0 |
| Chromium (Cr), % | 19 to 21 | |
| 0 |
| Cobalt (Co), % | 29.1 to 39 | |
| 0 |
| Copper (Cu), % | 0 | |
| 26.6 to 29 |
| Iron (Fe), % | 0 to 1.0 | |
| 0 to 0.050 |
| Lead (Pb), % | 0 | |
| 0 to 0.030 |
| Manganese (Mn), % | 0 to 0.15 | |
| 0 |
| Molybdenum (Mo), % | 9.0 to 10.5 | |
| 0 |
| Nickel (Ni), % | 33 to 37 | |
| 0 to 0.010 |
| Phosphorus (P), % | 0 to 0.015 | |
| 0 to 0.030 |
| Silicon (Si), % | 0 to 0.15 | |
| 0 |
| Silver (Ag), % | 0 | |
| 71 to 73 |
| Sulfur (S), % | 0 to 0.010 | |
| 0 |
| Titanium (Ti), % | 0 to 1.0 | |
| 0 |
| Zinc (Zn), % | 0 | |
| 0 to 0.060 |
| Residuals, % | 0 | |
| 0 to 0.21 |