ASTM B541 Gold vs. R30035 Cobalt
ASTM B541 gold belongs to the otherwise unclassified metals classification, while R30035 cobalt belongs to the cobalt alloys. There are 21 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.
For each property being compared, the top bar is ASTM B541 gold and the bottom bar is R30035 cobalt.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 110 | |
| 220 to 230 |
| Elongation at Break, % | 6.0 to 14 | |
| 9.0 to 46 |
| Poisson's Ratio | 0.4 | |
| 0.29 |
| Shear Modulus, GPa | 38 | |
| 84 to 89 |
| Tensile Strength: Ultimate (UTS), MPa | 670 to 1180 | |
| 900 to 1900 |
| Tensile Strength: Yield (Proof), MPa | 480 to 900 | |
| 300 to 1650 |
Thermal Properties
| Latent Heat of Fusion, J/g | 90 | |
| 320 |
| Melting Completion (Liquidus), °C | 1110 | |
| 1440 |
| Melting Onset (Solidus), °C | 930 | |
| 1320 |
| Specific Heat Capacity, J/kg-K | 170 | |
| 440 |
| Thermal Expansion, µm/m-K | 13 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.7 to 12 | |
| 1.7 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 4.0 to 6.2 | |
| 1.8 |
Otherwise Unclassified Properties
| Density, g/cm3 | 17 | |
| 8.7 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 65 to 91 | |
| 160 to 320 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 1090 to 3830 | |
| 210 to 5920 |
| Stiffness to Weight: Axial, points | 3.4 | |
| 14 to 15 |
| Stiffness to Weight: Bending, points | 9.0 | |
| 23 to 24 |
| Strength to Weight: Axial, points | 11 to 19 | |
| 29 to 61 |
| Strength to Weight: Bending, points | 9.8 to 14 | |
| 24 to 39 |
| Thermal Shock Resistance, points | 36 to 63 | |
| 23 to 46 |
Alloy Composition
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| Boron (B), % | 0 | |
| 0 to 0.015 |
| Carbon (C), % | 0 | |
| 0 to 0.025 |
| Chromium (Cr), % | 0 | |
| 19 to 21 |
| Cobalt (Co), % | 0 | |
| 29.1 to 39 |
| Copper (Cu), % | 13.5 to 15.5 | |
| 0 |
| Gold (Au), % | 70.5 to 72.5 | |
| 0 |
| Iron (Fe), % | 0 | |
| 0 to 1.0 |
| Manganese (Mn), % | 0 | |
| 0 to 0.15 |
| Molybdenum (Mo), % | 0 | |
| 9.0 to 10.5 |
| Nickel (Ni), % | 0 | |
| 33 to 37 |
| Phosphorus (P), % | 0 | |
| 0 to 0.015 |
| Platinum (Pt), % | 8.0 to 9.0 | |
| 0 |
| Silicon (Si), % | 0 | |
| 0 to 0.15 |
| Silver (Ag), % | 4.0 to 5.0 | |
| 0 |
| Sulfur (S), % | 0 | |
| 0 to 0.010 |
| Titanium (Ti), % | 0 | |
| 0 to 1.0 |
| Zinc (Zn), % | 0.7 to 1.3 | |
| 0 |
| Residuals, % | 0 to 0.4 | |
| 0 |