Ductile Hardened ASTM B540 vs. Work Hardened 90-platinum 10-iridium
Both ductile hardened ASTM B540 and work hardened 90-platinum 10-iridium are otherwise unclassified metals. Both are furnished in the cold worked (strain hardened) condition. There are 16 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.
For each property being compared, the top bar is ductile hardened ASTM B540 and the bottom bar is work hardened 90-platinum 10-iridium.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 110 | |
| 200 |
| Elongation at Break, % | 9.1 | |
| 5.5 |
| Poisson's Ratio | 0.38 | |
| 0.38 |
| Shear Modulus, GPa | 39 | |
| 74 |
| Shear Strength, MPa | 690 | |
| 320 |
| Tensile Strength: Ultimate (UTS), MPa | 1170 | |
| 550 |
Thermal Properties
| Latent Heat of Fusion, J/g | 140 | |
| 100 |
| Melting Completion (Liquidus), °C | 1220 | |
| 1830 |
| Specific Heat Capacity, J/kg-K | 240 | |
| 130 |
| Thermal Expansion, µm/m-K | 14 | |
| 8.6 |
Otherwise Unclassified Properties
| Density, g/cm3 | 13 | |
| 22 |
Common Calculations
| Stiffness to Weight: Axial, points | 4.7 | |
| 5.3 |
| Stiffness to Weight: Bending, points | 12 | |
| 9.1 |
| Strength to Weight: Axial, points | 26 | |
| 7.1 |
| Strength to Weight: Bending, points | 19 | |
| 6.9 |
| Thermal Shock Resistance, points | 58 | |
| 22 |
Alloy Composition
| Copper (Cu), % | 13.5 to 14.5 | |
| 0 |
| Gold (Au), % | 9.5 to 10.5 | |
| 0 |
| Iridium (Ir), % | 0 | |
| 9.5 to 10.5 |
| Palladium (Pd), % | 34 to 36 | |
| 0 |
| Platinum (Pt), % | 9.5 to 10.5 | |
| 89.3 to 90.5 |
| Silver (Ag), % | 29 to 31 | |
| 0 |
| Zinc (Zn), % | 0.8 to 1.2 | |
| 0 |
| Residuals, % | 0 | |
| 0 to 0.2 |