Zinc Die Casting Sevices

10 Years OEM/ODM

48Hours 3D prototype

Zinc Alloy Tooling: 8-Day Fast Delivery

Zinc Die Casting Supplier in China

Are you looking for a reliable partner to provide zinc die cast services?

Backed by a global supplier network of over 200 factories across China, Vietnam, and the US, Lex Hardware delivers fast zinc casting solutions.

Why choose us?

Low MOQ: Orders start at 100 units (or less).

Fast Prototyping: Expert engineering support for rapid prototyping.

End-to-End Service: One-stop manufacturing for your final products.

Choosing the Right Zinc Alloy for Your Project

Zamak 3 is the most widely used zinc die casting alloy, offering an optimal balance of strength, ductility, and excellent castability for complex, thin-walled precision parts with superior surface finishing.

Zamak3 Zinc Alloy Typical Application Scenarios:

Mobile phone accessories, camera housings, power tool casings
Door handles, rearview mirror brackets, dashboard decorative parts, seatbelt buckles
Faucet handles, shower fittings, lock housings, and zipper pulls
Toys & Decorative Items
Micro gears, electrical connectors, and instrument housings

Zamak 5 zinc alloy offers slightly higher strength, hardness, and creep resistance than Zamak 3, making it ideal for die casting components that require greater mechanical performance and wear resistance.

Zamak5 Typical Application Scenarios:

Automotive door lock assemblies, seatbelt buckles, rearview mirror brackets
Gears, bearing housings, motor casings, heavy machinery connectors, heavy-duty hinges
Industrial equipment door handles, plumbing hardware

Zamak 7 is a high-purity zinc alloy with low magnesium content and added nickel, offering superior ductility, excellent surface quality, and enhanced corrosion resistance—ideal for thin-walled, complex parts requiring superior finishing.

Typical Application Scenarios：

Zipper pulls, shoe buckles, photo frames, nameplates/medals, keychains
Mobile phone decorative parts, appliance knobs, lighting fixtures
Automotive interior decorative parts, emblems
High-precision die-cast toys, craft ornaments

If you have special customization requirements, we can source specific raw materials to manufacture the products you need. Other available zinc alloy options include:

Zamak 2
Zamak 8
Zamak 12
ZA-8 / ZA-12 / ZA-27
(Custom alloys upon request)

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Finishes for Zinc Die Cast

Electroplating

As the primary surface treatment for zinc alloys, electroplating significantly improves corrosion resistance, wear resistance, and aesthetic appearance.

Painting & Powder Coating

Applied via electrostatic powder spraying and cured at around 180-200°C, this coating offers outstanding durability, extensive color options, and excellent impact and chemical resistance.

PVD Vacuum Coating

PVD coating is an eco-friendly surface treatment that offers a wide range of premium metallic finishes and colors. It maintains a pristine, fade-resistant appearance over time. With an exceptionally high surface hardness exceeding 2500HV, its scratch, wear, and corrosion resistance far surpass traditional processes

What is zinc die casting?

Zinc Die Casting is a manufacturing process in which molten zinc alloy is injected at high pressure and high speed into a steel mold cavity, then cooled and solidified to produce precision metal components. It is the most mainstream and core processing method for zinc alloys, primarily utilizing hot chamber die casting.Zinc die casting is a highly durable and cost-efficient process that matches or surpasses the mechanical performance of cast aluminum, magnesium, bronze, and most cast irons. It stands out as one of the few alloy systems that perfectly balances strength, toughness, rigidity, and excellent castability.Through the die casting process, zinc alloy leverages its superior fluidity and low melting point to efficiently and cost-effectively produce complex, thin-walled, and high-precision components.

Zinc Die Casting Process

The complete zinc die casting process involves the following key steps:

Die Preparation: Pre-heating and lubricating the mold to ensure optimal casting conditions.
Melt Preparation: Heating the zinc alloy in the holding pot to the precise casting temperature.
Injection: Forcing the molten metal through the gooseneck into the die cavity under high pressure.
Recharge: Refilling the injection chamber with molten metal for the next cycle.
Cooling and Solidification: Allowing the metal to cool and harden within the closed die.
Die Opening and Ejection: Separating the mold halves and pushing out the solidified part.
Trimming and Finishing: Removing excess material (such as gates and flash) and applying final surface treatments.

Advantages of Using Zinc Alloy

Faster Production and Lower Energy Costs. Zinc alloy has a very low melting point of around 385°C. This allows the metal to melt quickly and use less energy. It also cools down fast inside the mold. As a result, the production cycle is much shorter, and factories can produce more parts in less time.

Exceptional Precision and Thin Walls. Molten zinc has excellent fluidity. It flows easily into every tiny corner of the mold. This makes it possible to create complex shapes and very thin walls that other metals cannot achieve. Because the metal fills the mold perfectly, the final parts have very high dimensional accuracy.

Long Mold Life and Lower Tooling Costs. Zinc does not stick to the steel mold. It also causes very little wear and tear on the mold surface. Therefore, zinc die casting molds can last for over one million cycles. This is much longer than aluminum molds, which greatly reduces the tooling cost per part.

Superior Surface Finish for Plating. The high fluidity leads to a very smooth surface right out of the mold. The parts have almost no surface pores. This makes zinc the perfect base for electroplating and powder coating. It saves a lot of money on surface preparation and gives a premium finish.

Excellent Strength and Rigidity. Zinc alloy is denser than aluminum. This extra weight gives the parts better rigidity and impact resistance. They feel solid and heavy in hand. Even though zinc is heavier, its excellent flow allows designers to make thinner walls. This helps balance the overall weight while keeping the part strong.

Cost-Effective for Precision Parts. While zinc is denser than aluminum or magnesium, its overall manufacturing cost is often lower for precision components. The combination of fast cycle times, long mold life, and low surface preparation costs makes zinc the most economical choice for hardware, locks, and decorative parts.

Disdvantages of Using Zinc Alloy

Internal Defects (Porosity, Shrinkage Cavities, Blistering): Die castings are prone to trapping air or developing shrinkage voids during the manufacturing process. This leads to surface blistering and pitting, severely affecting the appearance and the yield rate of subsequent plating or painting processes.

Poor corrosion resistance (white rust and intergranular corrosion). Zinc alloys are very susceptible to electrochemical corrosion (white rust) in humid or high salt-spray environments. Intergranular corrosion can occur when impurities such as lead or cadmium are present, which can lead to aging, swelling or even cracking of the parts.

Susceptibility to Creep and Low-Temperature Embrittlement: Mechanical strength drops significantly at temperatures above 100°C and dimensional expansion/deformation may occur. The toughness drops to a very low level below 0°C and the material becomes susceptible to brittle fracture.

High Density and Heavy Weight: Zinc has a density of about 6.7 g/cm³, which is significantly higher than aluminum (2.7 g/cm³). This is detrimental to lightweight design requirements.

Zinc Die Casting FAQs

1. We are unfamiliar with casting services. How should we begin the process?

You can send us 2D or 3D drawings, or offer a picture of the product you want. We can provide Design for Manufacturing (DFM) services for you. Please contact mailto:custom@lexhardware.com for assistance.

2. Do you provide finishing, machining, or assembly services for zinc die cast parts?

Yes, absolutely. We provide comprehensive secondary operations for our zinc die cast components to meet your exact specifications. Our capabilities include precision CNC machining, various surface finishing treatments (such as polishing, plating, powder coating, and painting), as well as custom assembly. This allows us to deliver fully finished, ready-to-install parts directly to you.

3. What are your minmum order quantities (MOQ's) for die casting parts?

We are highly flexible with order quantities. Our quotes always provide a tiered pricing breakdown based on MOQs. For example, the minimum order could start from just 100 pcs, depending on the size of the item, and larger quantities will unlock more competitive pricing.

4. How do you ensure quality and consistency in your die casting process?

We have implemented robust quality control measures to ensure consistency and reliability throughout the die casting process. Our Quality Management System is certified to ISO 9001:2015 and IATF 16949 standards, demonstrating our commitment to meeting the highest industry benchmarks. Our strict process includes thorough pre-production confirmation, multiple in-process quality inspections, and final photographic verification for customer approval. Additionally, we provide relevant material and industry certificates, and fully support third-party sample testing.