ASTM B540 Palladium vs. ASTM A229 Spring Steel
ASTM B540 palladium belongs to the otherwise unclassified metals classification, while ASTM A229 spring steel belongs to the iron alloys. There are 23 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.
For each property being compared, the top bar is ASTM B540 palladium and the bottom bar is ASTM A229 spring steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 110 | |
| 190 |
| Elongation at Break, % | 1.1 to 14 | |
| 14 |
| Fatigue Strength, MPa | 350 | |
| 710 to 790 |
| Poisson's Ratio | 0.38 | |
| 0.29 |
| Shear Modulus, GPa | 39 | |
| 72 |
| Shear Strength, MPa | 500 to 700 | |
| 1020 to 1140 |
| Tensile Strength: Ultimate (UTS), MPa | 830 to 1240 | |
| 1690 to 1890 |
| Tensile Strength: Yield (Proof), MPa | 620 to 1000 | |
| 1100 to 1230 |
Thermal Properties
| Latent Heat of Fusion, J/g | 140 | |
| 250 |
| Melting Completion (Liquidus), °C | 1220 | |
| 1450 |
| Melting Onset (Solidus), °C | 1020 | |
| 1410 |
| Specific Heat Capacity, J/kg-K | 240 | |
| 470 |
| Thermal Expansion, µm/m-K | 14 | |
| 12 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 4.9 to 5.5 | |
| 7.2 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 3.5 to 3.9 | |
| 8.3 |
Otherwise Unclassified Properties
| Density, g/cm3 | 13 | |
| 7.8 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 13 to 100 | |
| 200 to 230 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 1790 to 4660 | |
| 3260 to 4080 |
| Stiffness to Weight: Axial, points | 4.7 | |
| 13 |
| Stiffness to Weight: Bending, points | 12 | |
| 24 |
| Strength to Weight: Axial, points | 18 to 27 | |
| 60 to 67 |
| Strength to Weight: Bending, points | 15 to 20 | |
| 40 to 43 |
| Thermal Shock Resistance, points | 41 to 61 | |
| 54 to 60 |
Alloy Composition
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| Carbon (C), % | 0 | |
| 0.55 to 0.85 |
| Copper (Cu), % | 13.5 to 14.5 | |
| 0 |
| Gold (Au), % | 9.5 to 10.5 | |
| 0 |
| Iron (Fe), % | 0 | |
| 97.5 to 99 |
| Manganese (Mn), % | 0 | |
| 0.3 to 1.2 |
| Palladium (Pd), % | 34 to 36 | |
| 0 |
| Phosphorus (P), % | 0 | |
| 0 to 0.040 |
| Platinum (Pt), % | 9.5 to 10.5 | |
| 0 |
| Silicon (Si), % | 0 | |
| 0.15 to 0.35 |
| Silver (Ag), % | 29 to 31 | |
| 0 |
| Sulfur (S), % | 0 | |
| 0 to 0.050 |
| Zinc (Zn), % | 0.8 to 1.2 | |
| 0 |
| Residuals, % | 0 to 0.3 | |
| 0 |