Half-hard ASTM B617 vs. Half-hard ASTM B628
Both half-hard ASTM B617 and half-hard ASTM B628 are otherwise unclassified metals. Both are furnished in the half-hard temper. They have 82% of their average alloy composition in common.
For each property being compared, the top bar is half-hard ASTM B617 and the bottom bar is half-hard ASTM B628.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 75 | |
| 83 |
| Elongation at Break, % | 4.5 | |
| 3.4 |
| Poisson's Ratio | 0.37 | |
| 0.36 |
| Shear Modulus, GPa | 28 | |
| 31 |
| Shear Strength, MPa | 230 | |
| 270 |
| Tensile Strength: Ultimate (UTS), MPa | 390 | |
| 470 |
Thermal Properties
| Latent Heat of Fusion, J/g | 120 | |
| 140 |
| Melting Completion (Liquidus), °C | 870 | |
| 780 |
| Melting Onset (Solidus), °C | 780 | |
| 780 |
| Specific Heat Capacity, J/kg-K | 250 | |
| 280 |
| Thermal Expansion, µm/m-K | 19 | |
| 19 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 83 | |
| 84 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 72 | |
| 75 |
Otherwise Unclassified Properties
| Density, g/cm3 | 10 | |
| 10 |
Common Calculations
| Stiffness to Weight: Axial, points | 4.1 | |
| 4.6 |
| Stiffness to Weight: Bending, points | 14 | |
| 14 |
| Strength to Weight: Axial, points | 10 | |
| 13 |
| Strength to Weight: Bending, points | 11 | |
| 13 |
| Thermal Shock Resistance, points | 19 | |
| 21 |
Alloy Composition
| Aluminum (Al), % | 0 to 0.0050 | |
| 0 to 0.0050 |
| Cadmium (Cd), % | 0 to 0.050 | |
| 0 to 0.050 |
| Copper (Cu), % | 9.0 to 10.4 | |
| 26.6 to 29 |
| Iron (Fe), % | 0 to 0.050 | |
| 0 to 0.050 |
| Lead (Pb), % | 0 to 0.030 | |
| 0 to 0.030 |
| Nickel (Ni), % | 0 to 0.010 | |
| 0 to 0.010 |
| Phosphorus (P), % | 0 to 0.020 | |
| 0 to 0.030 |
| Silver (Ag), % | 89.6 to 91 | |
| 71 to 73 |
| Zinc (Zn), % | 0 to 0.060 | |
| 0 to 0.060 |
| Residuals, % | 0 | |
| 0 to 0.21 |