How to choose zinc alloy?

Which type of zinc alloy to choose is mainly considered from three aspects
1. The purpose of the die-casting parts themselves and the performance requirements that need to be met. include:
(1) Mechanical properties, tensile strength, are the maximum resistance of materials when they break;
Elongation is a measure of material brittleness and plasticity;
Hardness is the resistance of a material surface to plastic deformation caused by the pressing or friction of a hard object.
(2) Working environment status: working temperature, humidity, medium in contact with the workpiece, and air tightness requirements.
(3) Accuracy requirements: achievable precision and dimensional stability.
2. Good process performance:
(1) Casting process;
(2) Mechanical processing processability;
(3) Surface treatment processability.
3. Good economy: The cost of raw materials and the requirements for production equipment (including melting equipment, die-casting machines, molds, etc.), as well as production costs.