Zamak 4
Zamak 4 was developed for the Asian markets to reduce the effects of die soldering while maintaining the ductility of zamak 3. This was achieved by using half the amount of copper from the zamak 5 composition.
| Alloying elements | Impurities | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Standard | Limit | Al | Cu | Mg | Pb | Cd | Sn | Fe | Ni | Si | In | Tl |
| Ningbo Jinyi Alloy Material Co. | min | 3.9 | 0.3 | 0.03 | - | - | - | - | - | - | - | - |
| max | 4.3 | 0.5 | 0.06 | 0.003 | 0.002 | 0.002 | 0.075 | - | - | - | - | |
| Genesis Alloys Ltd. | min | 3.9 | 0.3 | 0.04 | - | - | - | - | - | - | - | - |
| max | 4.2 | 0.4 | 0.05 | 0.003 | 0.002 | 0.001 | 0.02 | 0.001 | 0.02 | 0.0005 | 0.001 | |
| Property | Metric value | English value |
|---|---|---|
| Mechanical properties | ||
| Ultimate tensile strength | 317 MPa | 46,000 psi |
| Yield strength (0.2% offset) | 221—269 MPa | 32,000—39,000 psi |
| Impact strength | 61 J (7 J aged) | 45 ft-lbf (5 ft-lbf aged) |
| Elongation | 7% | |
| Shear strength | 214—262 MPa | 31,000—38,000 psi |
| Compressive yield strength | 414—600 MPa | 60,000—87,000 psi |
| Fatigue strength (rotary bending 5x108 cycles) | 48—57 MPa | 7,000—8,300 psi |
| Hardness | 91 Brinell | |
| Physical properties | ||
| Solidification range (melting range) | 380—386 °C | 716—727 °F |
| Density | 6.6 g/cm3 | 0.24 lb/in3 |
| Coefficient of thermal expansion | 27.4 μm/m-°C | 15.2 μin/in-°F |
| Thermal conductivity | 108.9—113.0 W/m-K @ 100 °C | 755.6—784.0 BTU-in/hr-ft2-°F @ 212 °F |
| Electrical conductivity | 26-27% IACS | |
| Specific heat capacity | 418.7 J/kg-°C | 0.100 BTU/lb-°F |
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