ASTM B522 Class I vs. ASTM B477 Au-Ni-Ag
Both ASTM B522 class I and ASTM B477 Au-Ni-Ag are otherwise unclassified metals. They have a moderately high 91% 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 B522 class I and the bottom bar is ASTM B477 Au-Ni-Ag.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 96 | |
| 95 |
| Elongation at Break, % | 1.1 to 29 | |
| 5.5 to 11 |
| Knoop Hardness | 88 to 150 | |
| 100 to 190 |
| Poisson's Ratio | 0.41 | |
| 0.41 |
| Shear Modulus, GPa | 34 | |
| 34 |
| Shear Strength, MPa | 180 to 280 | |
| 190 to 320 |
| Tensile Strength: Ultimate (UTS), MPa | 280 to 490 | |
| 310 to 550 |
Thermal Properties
| Latent Heat of Fusion, J/g | 77 | |
| 80 |
| Melting Completion (Liquidus), °C | 1030 | |
| 1010 |
| Melting Onset (Solidus), °C | 1030 | |
| 930 |
| Specific Heat Capacity, J/kg-K | 160 | |
| 160 |
| Thermal Expansion, µm/m-K | 15 | |
| 15 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 11 | |
| 14 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 5.8 | |
| 7.5 |
Otherwise Unclassified Properties
| Density, g/cm3 | 17 | |
| 17 |
Common Calculations
| Stiffness to Weight: Axial, points | 3.1 | |
| 3.1 |
| Stiffness to Weight: Bending, points | 8.9 | |
| 8.9 |
| Strength to Weight: Axial, points | 4.4 to 7.8 | |
| 5.0 to 9.0 |
| Strength to Weight: Bending, points | 5.5 to 8.0 | |
| 6.0 to 8.8 |
| Thermal Shock Resistance, points | 13 to 24 | |
| 16 to 28 |
Alloy Composition
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| Gold (Au), % | 68 to 70 | |
| 74.2 to 75.8 |
| Nickel (Ni), % | 0 | |
| 2.6 to 3.4 |
| Platinum (Pt), % | 5.0 to 7.0 | |
| 0 |
| Silver (Ag), % | 23.5 to 26.5 | |
| 21.4 to 22.6 |
| Residuals, % | 0 to 0.35 | |
| 0 to 0.3 |