Zamak 3 (ASTM AG40A, Z33520 UNS,) is a zinc alloy that is widely used in the die-casting industry. It has excellent physical and mechanical properties, superb cast-ability, and long-term dimensional stability. Zamak 3 is used in a wide variety of applications, and it is the alloy of choice for about 70-80% of die-castings in the United States. Zamak is the acronym for zinc, aluminum, magnesium, and copper.
Physical and Mechanical Properties
Zamak 3 zinc alloy has excellent physical and mechanical properties, which make it ideal for use in die-casting applications. It has a high strength-to-weight ratio, which makes it a good choice for parts that need to be strong but lightweight. It is also highly resistant to corrosion, which makes it suitable for use in harsh environments.
Zamak 3 zinc alloy, similar to other zinc alloys, has a low melting point, which makes it easy to work with. It can be easily melted and poured into a mold, which makes it ideal for use in die-casting. It also has good fluidity, which means that it can fill even complex molds with ease.
Zamak 3 Superb Cast-ability
Zamak 3 alloy is known for its superb cast-ability. It can be easily cast into a wide variety of shapes and sizes, which makes it suitable for use in a wide variety of applications. It is also highly resistant to cracking and other defects that can occur during the casting process.
Long-Term Dimensional Stability
One of the most important properties of Zamak No. 3 is its long-term dimensional stability. It does not shrink or warp over time, which makes it ideal for use in applications where tight tolerances are required. It is also highly resistant to fatigue, which means that it can withstand repeated use without degrading.
Applications
Zamak 3 zinc alloy is used in a wide variety of applications, including fasteners, brackets, electrical components, and consumer goods. It is often used in applications where strength, durability, cost, and dimensional stability are important.
In the electrical industry, Zamak 3 is used to make a wide variety of components, including connectors, terminals, and switches. It is also used to make electrical enclosures and housings.
In the consumer goods industry, Zamak 3 is used to make a wide variety of products, including hardware, hand tools, and sporting goods. It is also used to make decorative items, such as jewelry, figurines, and ornaments.
Conclusion
Zamak No. 3 is the most widely used zinc alloy in the die-casting industry. Its excellent all-around physical and mechanical properties, superb cast-ability, and long-term dimensional stability have made it the alloy of choice for about 85% of die-castings in the United States. In most design applications using a zinc alloy, Zamak 3 will do the job. Only after casting design improvements have been evaluated and found inadequate should another alloy be considered.
If you are looking for a zinc alloy for your die-casting application, Zamak 3 zinc is an excellent choice. Its properties make it ideal for use in a wide variety of applications, and it is widely available from a variety of suppliers. With its combination of strength, durability, and dimensional stability, Zamak 3 is sure to meet your needs for years to come.
Download our zinc alloy property guide below for additional information.
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Dave Magner
Dave Magner is the Director of Sales and Marketing and has been with Deco Products since 2015. He has a +20 years of engineering experience in mechanical and electrical testing and design and zinc die casting, plastic injection molding, stamping, assembly, and automation processes.
