R30035 Cobalt vs. ASTM B541 Gold
R30035 cobalt belongs to the cobalt alloys classification, while ASTM B541 gold belongs to the otherwise unclassified metals. 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 R30035 cobalt and the bottom bar is ASTM B541 gold.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 220 to 230 | |
| 110 |
| Elongation at Break, % | 9.0 to 46 | |
| 6.0 to 14 |
| Poisson's Ratio | 0.29 | |
| 0.4 |
| Shear Modulus, GPa | 84 to 89 | |
| 38 |
| Tensile Strength: Ultimate (UTS), MPa | 900 to 1900 | |
| 670 to 1180 |
| Tensile Strength: Yield (Proof), MPa | 300 to 1650 | |
| 480 to 900 |
Thermal Properties
| Latent Heat of Fusion, J/g | 320 | |
| 90 |
| Melting Completion (Liquidus), °C | 1440 | |
| 1110 |
| Melting Onset (Solidus), °C | 1320 | |
| 930 |
| Specific Heat Capacity, J/kg-K | 440 | |
| 170 |
| Thermal Expansion, µm/m-K | 13 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 1.7 | |
| 7.7 to 12 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 1.8 | |
| 4.0 to 6.2 |
Otherwise Unclassified Properties
| Density, g/cm3 | 8.7 | |
| 17 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 160 to 320 | |
| 65 to 91 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 210 to 5920 | |
| 1090 to 3830 |
| Stiffness to Weight: Axial, points | 14 to 15 | |
| 3.4 |
| Stiffness to Weight: Bending, points | 23 to 24 | |
| 9.0 |
| Strength to Weight: Axial, points | 29 to 61 | |
| 11 to 19 |
| Strength to Weight: Bending, points | 24 to 39 | |
| 9.8 to 14 |
| Thermal Shock Resistance, points | 23 to 46 | |
| 36 to 63 |
Alloy Composition
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| Boron (B), % | 0 to 0.015 | |
| 0 |
| Carbon (C), % | 0 to 0.025 | |
| 0 |
| Chromium (Cr), % | 19 to 21 | |
| 0 |
| Cobalt (Co), % | 29.1 to 39 | |
| 0 |
| Copper (Cu), % | 0 | |
| 13.5 to 15.5 |
| Gold (Au), % | 0 | |
| 70.5 to 72.5 |
| Iron (Fe), % | 0 to 1.0 | |
| 0 |
| Manganese (Mn), % | 0 to 0.15 | |
| 0 |
| Molybdenum (Mo), % | 9.0 to 10.5 | |
| 0 |
| Nickel (Ni), % | 33 to 37 | |
| 0 |
| Phosphorus (P), % | 0 to 0.015 | |
| 0 |
| Platinum (Pt), % | 0 | |
| 8.0 to 9.0 |
| Silicon (Si), % | 0 to 0.15 | |
| 0 |
| Silver (Ag), % | 0 | |
| 4.0 to 5.0 |
| Sulfur (S), % | 0 to 0.010 | |
| 0 |
| Titanium (Ti), % | 0 to 1.0 | |
| 0 |
| Zinc (Zn), % | 0 | |
| 0.7 to 1.3 |
| Residuals, % | 0 | |
| 0 to 0.4 |