Work Hardened ASTM B522 Class I vs. Work Hardened ASTM B522 Class II
Both work hardened ASTM B522 class I and work hardened ASTM B522 class II are otherwise unclassified metals. Both are furnished in the cold worked (strain hardened) condition. Their average alloy composition is basically identical.
For each property being compared, the top bar is work hardened ASTM B522 class I and the bottom bar is work hardened ASTM B522 class II.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 96 | |
| 96 |
| Elongation at Break, % | 1.1 | |
| 1.1 |
| Knoop Hardness | 150 | |
| 150 |
| Poisson's Ratio | 0.41 | |
| 0.41 |
| Shear Modulus, GPa | 34 | |
| 34 |
| Shear Strength, MPa | 280 | |
| 280 |
| Tensile Strength: Ultimate (UTS), MPa | 490 | |
| 490 |
| Tensile Strength: Yield (Proof), MPa | 210 | |
| 210 |
Thermal Properties
| Latent Heat of Fusion, J/g | 77 | |
| 77 |
| Melting Completion (Liquidus), °C | 1030 | |
| 1030 |
| Melting Onset (Solidus), °C | 1030 | |
| 1030 |
| Specific Heat Capacity, J/kg-K | 160 | |
| 160 |
| Thermal Expansion, µm/m-K | 15 | |
| 15 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 11 | |
| 11 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 5.8 | |
| 5.7 |
Otherwise Unclassified Properties
| Density, g/cm3 | 17 | |
| 17 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 4.5 | |
| 4.4 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 230 | |
| 230 |
| Stiffness to Weight: Axial, points | 3.1 | |
| 3.1 |
| Stiffness to Weight: Bending, points | 8.9 | |
| 8.9 |
| Strength to Weight: Axial, points | 7.8 | |
| 7.8 |
| Strength to Weight: Bending, points | 8.0 | |
| 8.0 |
| Thermal Shock Resistance, points | 24 | |
| 24 |
Alloy Composition
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| Gold (Au), % | 68 to 70 | |
| 68.5 to 69.5 |
| Platinum (Pt), % | 5.0 to 7.0 | |
| 5.5 to 6.5 |
| Silver (Ag), % | 23.5 to 26.5 | |
| 24.5 to 25.5 |
| Sulfur (S), % | 0 | |
| 0 to 0.010 |
| Residuals, % | 0 to 0.35 | |
| 0 to 0.26 |