Aluminum alloy is the general name of the alloy based on aluminium. The main alloying elements are copper, silicon, magnesium, zinc and manganese, while the minor alloying elements are nickel, iron, titanium, chromium and lithium. Aluminum alloy is one of the most widely used non-ferrous metal structural materials in industry. It is widely used in aviation, aerospace, automobile, machinery manufacturing, shipping and chemical industry.
Zinc alloys are alloys based on zinc with other elements added. Aluminum, copper, magnesium, cadmium, lead, titanium and other low-temperature zinc alloys are commonly added. Zinc alloy has low melting point, good fluidity, easy melting, brazing and plastic processing, corrosion resistance in the atmosphere, easy recovery and remelting of residual materials, but low creep strength, easy to change size due to natural aging. Zinc alloys are prepared by melting, die casting or pressure processing. According to the manufacturing process, it can be divided into cast zinc alloy and deformed zinc alloy. It can be used for galvanizing and anti-corrosion of die-casting instruments, automotive parts shell and pole surface, hot-dipping treatment of boiler water wall pipeline to improve high temperature corrosion resistance, etc.

The differences in die casting process between aluminium alloy and zinc alloy are as follows:
1. The melting temperature of the two alloys is different. Zinc alloys are more than 400 degrees and aluminium alloys are more than 700 degrees.
2. Processing equipment is different. Although they are called die-casting machines, they can not be used in general.
3. Different processing technology and parameters.

Difference of Mechanical Properties between Aluminum Alloy and Zinc Alloy
Zinc alloy hardness 65-140, tensile strength 260-440
Aluminum alloy hardness 45-90, tensile strength 120-290
Overall, zinc alloy has higher hardness and tensile strength than aluminium alloy.

The difference is:
Aluminum alloy has low density but high strength, close to or over high quality steel, good plasticity, and can be processed into various profiles. It has excellent electrical conductivity, thermal conductivity and corrosion resistance. It is widely used in industry, and its usage is second only to steel. Some aluminium alloys can obtain good mechanical properties, physical properties and corrosion resistance by heat treatment. Hard aluminium alloy belongs to AI-Cu-Mg system, which generally contains a small amount of Mn and can be strengthened by heat treatment. Its characteristics are high hardness but poor plasticity. Superhard aluminium belongs to Al-Cu-Mg-Zn system, which can be strengthened by heat treatment. It is the highest strength aluminium alloy at room temperature, but it has poor corrosion resistance and fast softening at high temperature. Forged aluminium alloys are mainly Al-Zn-Mg-Si alloys. Although many kinds of elements are added, the content is small, so they have excellent thermoplasticity and are suitable for forging, so they are also called forged aluminium alloys.
Zinc alloys are alloys based on zinc with other elements added. Aluminum, copper, magnesium, cadmium, lead, titanium and other low-temperature zinc alloys are commonly added. Zinc alloy has low melting point, good fluidity, easy melting, brazing and plastic processing, corrosion resistance in the atmosphere, easy recovery and remelting of residual materials, but low creep strength, easy to change size due to natural aging. Molten method, die casting or pressure processing into materials. According to the manufacturing process, it can be divided into cast zinc alloy and deformed zinc alloy.
Zinc alloys can be divided into deformation and casting zinc alloys according to processing technology. Cast zinc alloys have good fluidity and corrosion resistance, and are suitable for die-casting instruments, automotive parts shell and so on.

The characteristics are:
1. Relatively significant.
2. The casting performance is good. It can die-cast precision parts with complex shape and thin wall, and the surface of the castings is smooth.
3.Surface treatment: electroplating, spraying, painting, polishing, grinding, etc.
4. No iron absorption, no corrosion and no sticking during melting and die casting.
5. It has good mechanical properties and wear resistance at room temperature.
6. Low melting point, melting at 385 C, easy to die-casting.
Aluminum alloy has low density but high strength, close to or over high quality steel, good plasticity, and can be processed into various profiles. It has excellent electrical conductivity, thermal conductivity and corrosion resistance. It is widely used in industry, and its usage is second only to steel.
Zinc alloy has low melting point, good fluidity, easy melting, brazing and plastic processing, corrosion resistance in the atmosphere, easy recovery and remelting of residual materials, but low creep strength, easy to change size due to natural aging.

Elements in aluminium alloys:
Aluminum alloy is the general name of the alloy based on aluminium. The main alloying elements are copper, silicon, magnesium, zinc and manganese, while the minor alloying

elements are nickel, iron, titanium, chromium and lithium.

Elements in zinc alloys:
Zinc alloys are alloys based on zinc with other elements added. Aluminum, copper, magnesium, cadmium, lead, titanium and other alloying elements are commonly added.