Stress Relieved ASTM B540 vs. Stress Relieved ASTM B541
Both stress relieved ASTM B540 and stress relieved ASTM B541 are otherwise unclassified metals. Both are furnished in the stress relieved condition. They have a modest 38% of their average alloy composition in common, which, by itself, doesn't mean much. There are 23 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.
For each property being compared, the top bar is stress relieved ASTM B540 and the bottom bar is stress relieved ASTM B541.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 110 | |
| 110 |
| Elongation at Break, % | 9.1 | |
| 9.5 |
| Knoop Hardness | 310 | |
| 310 |
| Poisson's Ratio | 0.38 | |
| 0.4 |
| Shear Modulus, GPa | 39 | |
| 38 |
| Shear Strength, MPa | 610 | |
| 600 |
| Tensile Strength: Ultimate (UTS), MPa | 1040 | |
| 1020 |
| Tensile Strength: Yield (Proof), MPa | 930 | |
| 830 |
Thermal Properties
| Latent Heat of Fusion, J/g | 140 | |
| 90 |
| Melting Completion (Liquidus), °C | 1220 | |
| 1110 |
| Melting Onset (Solidus), °C | 1020 | |
| 930 |
| Specific Heat Capacity, J/kg-K | 240 | |
| 170 |
| Thermal Expansion, µm/m-K | 14 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 5.2 | |
| 8.3 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 3.7 | |
| 4.3 |
Otherwise Unclassified Properties
| Density, g/cm3 | 13 | |
| 17 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 91 | |
| 91 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 4030 | |
| 3260 |
| Stiffness to Weight: Axial, points | 4.7 | |
| 3.4 |
| Stiffness to Weight: Bending, points | 12 | |
| 9.0 |
| Strength to Weight: Axial, points | 23 | |
| 16 |
| Strength to Weight: Bending, points | 18 | |
| 13 |
| Thermal Shock Resistance, points | 51 | |
| 54 |
Alloy Composition
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| Copper (Cu), % | 13.5 to 14.5 | |
| 13.5 to 15.5 |
| Gold (Au), % | 9.5 to 10.5 | |
| 70.5 to 72.5 |
| Palladium (Pd), % | 34 to 36 | |
| 0 |
| Platinum (Pt), % | 9.5 to 10.5 | |
| 8.0 to 9.0 |
| Silver (Ag), % | 29 to 31 | |
| 4.0 to 5.0 |
| Zinc (Zn), % | 0.8 to 1.2 | |
| 0.7 to 1.3 |
| Residuals, % | 0 to 0.3 | |
| 0 to 0.4 |