What are zinc castings like
We use mainly ZP0410 zinc alloy according to ES 12844 for zinc castings. This alloy has an excellent castability and it is suitable for sections with complicated shape. Castings are produced by means of pressure die casting in the machines with heat chamber with high number of injections. Wear of the mould in this process is only negligible; the moulds can be used in more than 1 million cycles without any problems. Excellent castability of zinc alloys enables to reach very accurate dimensions and good quality of castings surface, which allows their galvanizing and lacquering with only minimal demand of further working.
Composition and characteristics of castings from zinc alloys at 200C
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Extract from ČSN EN 12844 |
| Type of alloy | ZP0410 (ZnAl4Cu1) |
ZP0430 (ZnAl4Cu3) |
|
| Amount of elements | |||
| Al | % | 3,7 - 4,3 | 3,7 - 4,3 |
| Cu | % | 0,7 - 1,2 | 2,7 - 3,3 |
| Mg | % | 0,025 - 0,06 | 0,025 - 0,06 |
| Zn | % | Residue | Residue |
| Permissible admixtures | |||
| Pb | % | max. 0,005 | max. 0,005 |
| Cd | % | max. 0,005 | max. 0,005 |
| Sn | % | max. 0,002 | max. 0,002 |
| Fe | % | max. 0,05 | max. 0,05 |
| Ni | % | max. 0,02 | max. 0,02 |
| Si | % | max. 0,03 | max. 0,03 |
| Properties | |||
| Tensile strength | MPa | 330 | 355 |
| Drawing quality A (50 mm) | % | 5 | 5 |
| Brinell hardness HBS 500-10-30 | 92 | 102 | |
| Impact energy (a bar without a notch 6,3 x 6,3 mm) | J | 58 | 59 |
| Modulus of elasticity in tension | GPa | 85 | 85 |
| 0,2 % yield point | MPa | 250 | 270 |
| Fatigue limit (108 cycles) | MPa | 56 | 60 |
| Creep limit for 0,5 % deformation (3000 h) | MPa | 100 | 130 |
| Density | kg/dm3 | 6,7 | 6,8 |
| Range of smelting temperature | 0C | 379 bis 388 | 379 bis 389 |
| Coefficient of thermal expansivity | µm/(m.K) | 27 | 27 |
| Thermal conductivity | W/(m.K) | 110 | 119 |
| Conductivity | % IACS | 26 | 26 |
|
Notes: |
COMPARISON OF FEATURES OF PRESSURE DIE CASTED ZINC ALLOY WITH OTHER METALS
