FAQ

Frequently Asked Question(FAQ)

Contents Of Table

• What is Zinc Die Casting ?
• Which products are made from zinc casting and popular ?
• What Alloys Are Made With Zinc ?
• Which Are Used Zinc Cast Parts In Automotive Industry ?
• What Is The Surface Finish Of Die Cast Aluminium ?
• What Are The Advantages Of Zinc Alloys ?
• How Much Is Zinc Die Casting Part Cheaper Than Aluminum One ?
• Why Is Zinc Commonly Used In Die Casting Applications ?
• Which Are Zinc Die Casting Component Electrical Conductivity ?

Q: What is Zinc Die Casting ?

A: Zinc die casting is zinc cast parts manufacturing process, means the worker will melt solid zinc alloy block into liquid, and under the strong pressure of hot chamber die casting machine, pushes the molten zinc into precision steel die, then cooling the die , makes the molten zinc to return various shaped solid. Then eject the solid zinc shaped parts from the die. In general, zinc die casting process can run at the temperature range from 380℃-450℃. ——FAQ NO.1

Q: Which Products Are Made From Zinc Die Casting And Popular ?

A: Zinc cast products are common and popular, from automotive components, consumer electrics to furniture hardware. Like belt buckles, door handles, lock cores, smart device housings, connectors, signal propagator and smart lock housings. This dues to metal properties of the zinc alloy, which has excellent fluidity and ductility, ensure accurate dimension and flexible integrated structure of the cast parts, even though its lower process cost. ——FAQ No. 2

Q: What Alloys Are Made With Zinc ?

A: Zinc alloys are commonly used in die casting due to their excellent fluidity, cost-efficiency production and resistance to corrosion. These zinc alloys Include the below types.

Zamak Alloy

• Zamak 2 (Zn + 4% Al, 3% Cu, 0.06% Mg) – Highest strength, good hardness, with excellent wear resistance and anti-collision.
• Zamak 3 (Zn + 4% Al, 0.03% Mg) – Excellent balance of strength and ductility (most common), create thin wall and complex structure small size parts.
• Zamak 5 (Zn + 4% Al, 1% Cu, 0.06% Mg) – Improved hardness and creep resistance, suitable for precision dimensions die castings.
• Zamak 7 (Low-Aluminum variant) – Better corrosion resistance, maintain good performance when exposed to harsh environments

ZA Alloys

• ZA-8 (Zn + 8% Al, 1% Cu, 0.03% Mg) – Used for gravity casting, reduce viberations of heavy mechanical components.
• ZA-12 & ZA-27 (Higher Al, Cu, Mg) – Stronger but less castable than Zamak, And keep good fluidity of melting material.

———-FAQ No.3

Q: Which Are Used Zinc Cast Parts In Automotive Industry ?

A: Zinc cast parts have used for automtive industry widely due to their excellent wear resistance,corrosion resistance,flexible castability and precision process. Whenever automotive interiors or automotive extoriors, the medium and small sized components can always be made at lower production cost.

• Interior serial parts: safety belt buckles, lock cores, switch fixed bracket and some interior decorative parts.
• Exterior serial parts: Door handles, Anntenant, brake system parts, sensor housings and fuel way fittings.

——-FAQ No. 4

Q: What Is The Surface Finish Of Die Cast Aluminium ?

A: Die cast aluminum typically has a variety of surface finishes, they can protect these cast parts better, makes them more durable and better decorative appearance. surface finishing options for die casting aluminum include the below options.

• Machined Finish: Improve the roughnesss of the surface powerfully
• Electroplating: enhanced appearance and aesthetic, increased wear resistance
• Paint & Powder Coating: corrosion resistance and build a good appearance and decoration
• Anodizing: create a protective oxide layer, improving corrosion resistance and surface hardness.

—— FAQ No. 5

Q: What Are The Advantages Of Using Zinc alloy?

A: Zinc alloys offer several advantages,which are excellent ductility, good molten metal fluidity and high corrosion resistance. The unique metal is molten at lower temperature, overflow the impurities and entrapped gas inside the metal easily, makes the metal part gain a superious surface finish, less post-processing in further. Additionally zinc alloys are 100% recycled and even though scrips and waste zinc parts reused again.

—— FAQ No. 6

Q: How Much Is Zinc Die Casting Part Cheaper Than Aluminum One ?

A: The cost difference between zinc casting parts and aluminum casting parts can vary based on several factors such as production volume, production cycle time, the raw material cost, consumption energy cost and specific alloys material used. Generally speaking, zinc alloy casting parts tend to be 20% to 40% cheaper than aluminum alloy casting parts. Defined From several aspects, which is material cost, process cost, cast die cost, post-processing cost and order quantity etc.

—— FAQ No. 7

Q: Why Is Zinc Commonly Used In Die Casting Applications ?

A: Zinc is commonly used due to the metal is so easy to cast at lower production cost, excellent corrosion and flexible design structure. The zinc belongs to lower melting point metal, allows cast the intended parts in a few seconds, and create superious surface finish and steady dimension and integrated structure, compare to higher melting points metal, which require lower cooling process, the rough surface of them need more post-processing to treat. From the below tips, let you learn more about it.

• Excellent Ductility: The molten zinc has excellent ductility, ensure thin walled structural parts steady dimension and strong integrated structure of the cast parts completely.
• Tight tolerance In Dimension: The superious fluidity molten metal can fill the die fully, ensure the cast part has an accurate dimension.
• Superier Fluidity: The zinc molten metal has supperior fluidity, fill the die completely quickly, ensure the complex cast parts integrated structure and satified complex geometries.
• Lower Melting Points: Zinc alloy is a lower melting points metal, consumpt less heat energy, and save more the cost of heat energy.
• ECO-friendly And Sustainablity: The material is eco-friendly, 100% reused and recyled, maintain friendly balance of nature, and beneficial to environmental protection.
• High Corrosion Resistance: Its high corrosion resistance makes them applications of worse environments and durablity.

—— FAQ No. 8

Q: Which Are Zinc Die Casting Component Electrical Conductivity ?

A: Zinc die casting components are used in various industries, including electric communication, due to their strength, durability, miniature and ability to form intricate shapes. However, when it comes to electrical conductivity, zinc has moderate conductivity compared to other metals.

Zinc’s Electrical Conductivity

Zinc has an electrical conductivity of approximately 16.6% IACS (International Annealed Copper Standard). This means zinc conducts electricity at about 16.6% of the efficiency of copper, which is the standard at 100% IACS.

Zinc Alloy Compostion

Comparison with Other Metals: Copper: 100% IACS (very high conductivity) Aluminum: Around 61% IACS (widely used for electrical purposes) Zinc: Around 16.6% IACS (moderate conductivity)

While zinc’s conductivity is significantly lower than copper and aluminum, it is still usable in applications where moderate electrical conduction is sufficient or where the primary function of the component is mechanical support, shielding, or corrosion resistance rather than optimal conductivity.

—— FAQ No. 9