Zinc Die Castings

Zinc gets a bad rap.  People just don’t realize how much Zinc they touch every day.  Zinc is most commonly used in aesthetic parts such as door handles, sink hardware, semi-horns,  belt buckles; the list goes on.  It’s easier not to notice Zinc because it is commonly chrome plated, polished, colored bronze or painted.

Zinc Benefits:

  • High strength and hardness
  • Heavy (~2x the weight of aluminum)
  • Corrosion resistant
  • Excellent as cast surface finish
  • Easily plated
  • Better castability when compared to Aluminum (allows for thinner walls and less draft)
  • Recyclable

Zinc alloys we cast

  • Zinc alloy 3
  • Zinc alloy 5
  • ZA 8

Additional zinc alloys available at your request.

Dynacast is a world leading precision zinc die caster. We have produced billions of zinc die cast components—from one hundredth of a gram to one kilogram in size.

Characteristics of Zinc Alloys

  • High strength and hardness
  • Excellent electrical conductivity
  • High thermal conductivity
  • Cost-effective raw material
  • High dimensional accuracy and stability
  • Outstanding thin wall capabilities
  • Cold formability, facilitating easier joining
  • High-quality finishing properties
  • Superior corrosion resistance
  • Fully recyclable

Zinc Creep

Despite being heavier than some other metals, zinc stands out for its strength and durability, often offering a more cost-effective solution. Zinc’s higher melting point results in lower energy consumption during manufacturing. Many manufacturers prefer zinc die casting over machining, pressing, stamping, and fabricating components.

Applications for Zinc:

  • Complex net-shaped zinc housings with precise thin walls provide excellent electrical performance and shielding properties.
  • Our proprietary multi-slide die casting process and superior thin-wall capabilities make us a leading supplier of zinc components for a wide range of consumer electronic devices.
  • Zinc’s castability, wear resistance, and structural integrity make it ideal for creating multifaceted, highly complex shapes used in automotive safety and electronics industries.

Zinc Alloys

Zamak 2

Zamak 2 (ASTM AC43A), also known as Zinc Alloy 2 or Kirksite, boasts the highest strength and hardness in the Zamak family.

Zamak 3

Zamak 3 (ASTM AG40A), or Zinc Alloy 3, is the most commonly used zinc alloy in North America and is typically the first choice for zinc die casting due to its numerous advantages.

Zamak 5

Zamak 5 (ASTM AC41A), or Zinc Alloy 5, is the most prevalent zinc alloy in Europe.

Zamak 7

Zamak 7 (ASTM AG40B), or Zinc Alloy 7, is a modified version of Zamak 3. It features lower magnesium content and stricter impurity specifications, resulting in improved casting fluidity, ductility, and surface finish.

ZA 8

ZA-8, a zinc-aluminum alloy, contains significantly more aluminum than the Zamak group of alloys, with approximately 8.4% aluminum. It is the only ZA alloy that can be hot-chamber die cast, a crucial factor when selecting material for specific components.

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