ASTM B541 Gold vs. ASTM B477 Au-Ni-Ag
Both ASTM B541 gold and ASTM B477 Au-Ni-Ag are otherwise unclassified metals. They have 76% of their average alloy composition in common. There are 20 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.
For each property being compared, the top bar is ASTM B541 gold and the bottom bar is ASTM B477 Au-Ni-Ag.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 110 | |
| 95 |
| Elongation at Break, % | 6.0 to 14 | |
| 5.5 to 11 |
| Knoop Hardness | 220 to 340 | |
| 100 to 190 |
| Poisson's Ratio | 0.4 | |
| 0.41 |
| Shear Modulus, GPa | 38 | |
| 34 |
| Shear Strength, MPa | 410 to 690 | |
| 190 to 320 |
| Tensile Strength: Ultimate (UTS), MPa | 670 to 1180 | |
| 310 to 550 |
Thermal Properties
| Latent Heat of Fusion, J/g | 90 | |
| 80 |
| Melting Completion (Liquidus), °C | 1110 | |
| 1010 |
| Melting Onset (Solidus), °C | 930 | |
| 930 |
| Specific Heat Capacity, J/kg-K | 170 | |
| 160 |
| Thermal Expansion, µm/m-K | 13 | |
| 15 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.7 to 12 | |
| 14 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 4.0 to 6.2 | |
| 7.5 |
Otherwise Unclassified Properties
| Density, g/cm3 | 17 | |
| 17 |
Common Calculations
| Stiffness to Weight: Axial, points | 3.4 | |
| 3.1 |
| Stiffness to Weight: Bending, points | 9.0 | |
| 8.9 |
| Strength to Weight: Axial, points | 11 to 19 | |
| 5.0 to 9.0 |
| Strength to Weight: Bending, points | 9.8 to 14 | |
| 6.0 to 8.8 |
| Thermal Shock Resistance, points | 36 to 63 | |
| 16 to 28 |
Alloy Composition
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| Copper (Cu), % | 13.5 to 15.5 | |
| 0 |
| Gold (Au), % | 70.5 to 72.5 | |
| 74.2 to 75.8 |
| Nickel (Ni), % | 0 | |
| 2.6 to 3.4 |
| Platinum (Pt), % | 8.0 to 9.0 | |
| 0 |
| Silver (Ag), % | 4.0 to 5.0 | |
| 21.4 to 22.6 |
| Zinc (Zn), % | 0.7 to 1.3 | |
| 0 |
| Residuals, % | 0 to 0.4 | |
| 0 to 0.3 |