Zamak 7

Zamak Alloy 8: The Ultimate FAQ Guide

Choosing a suitable Zamak alloy 8 can be an overwhelming task.

A reason this guide will make everything simple and easy for you to understand.

So, keep reading to learn more.

What Is Zamak Alloy 8?

Zamak alloy 8 is a suitable gravity casting alloy, compared to the different Zamak alloys.

It has an improved strength, hardness and creep properties.

It is swiftly growing for pressure die casting.

Compared to the other Zamak group of alloys, this has extra aluminum.

Zamak alloy 8 is best suited for decorative applications due to its finishing and plating features.

 Zamak alloy components

Zamak 8 components

Are There Other Zamak Alloys Apart From Zamak Alloy 8?

There are several Zamak alloys and they include;

  • Zamak 2 – Zamak 2 compared to the other Zamak alloys has the greatest strength. It retains its strength and hardness better with time.

However, it more fragile, it shrinks and it is much less stretchy. Originally it was once designed for low volume sheet metal dies.

  • Zamak 3 – for the Zamak alloys Zamak 3 has the base composition.

It has excellent castability and lengthy term dimensional stability. Zinc die castings are forged from Zamak 3 at times.

  • Zamak 4 – Zamak 4 minimizes the results of die soldering as it continues the ductility of Zamak 3.

The quantity of copper that was used was half the amount from the Zamak 5 composition for this to be achieved.

  • Zamak 5 – it has the identical composition as Zamak 3.

However with 1% extra copper so that it will increase strength, hardness and corrosive resistance but also reduces ductility.

It has much less dimensional accuracy. It is commonly used in Europe.

  • Zamak 7 – compared to Zamak 3, Zamak 7 has a smaller amount of magnesium.

This is to increase fluidity and ductility which is beneficial all through casting thin wall components.

  • Zamak 12 – Zamak 12 is the suitable gravity casting alloy for sand, permanent and the graphite mold casting alloy.

To add to that it is also a suitable cold chamber die casting alloy and a perfect bearing alloy.

Zamak 12 also allows for plating although plating adhesion is minimized.

  • Zamak 27 – Zamak 27 is a cold chamber die casting alloy which is no longer approved for plating.

With a yield strength of 380MPa Zamak 27 is an extremely booming alloy.

It is light and has outstanding bearing and wear performance.

It has demonstrated perfect performance when wear properties and brute strength are required.

Is Zamak Alloy 8 Stronger Than Aluminum Alloy?

Zamak alloy 8 is stronger than aluminum alloy.

Zamak alloy 8 contains zinc which makes it stronger and very long lasting than aluminum alloy.

For that reason tools that are made from aluminum die casts don’t last longer compared to those tools that are forged from zinc die casts which are very durable.

Which Physical Properties Do Zamak Alloy 8 Have?

Some of the main properties include:

Zamak Ignot

Zamak Ignot

It has a Solidification range of 1.1

Besides, the density is 6.3

Its coefficient of thermal expansion is 23.3

Furthermore, it has a specific heat capacity of 435.4

It has thermal conductivity of 114.7

What Is The Composition Of Zamak Alloy 8?

Zamak alloy 8 has a composition that consist of the following;

  • Aluminum 0-8.8
  • Lead (max) 006
  • Magnesium 015-0.03
  • Tin (max) 003
  • Iron (max) 075
  • copper 8-1.3
  • Cadmium (max) 006
  • Zinc

Can You Die Cast Zamak Alloy 8?


Zamak alloy 8 can be die casted.

Die casting Zamak alloy 8 provides quite a few benefits and additionally has countless advantages.

Die cast Zamak alloy 8

Die cast Zamak alloy 8

What Is Zamak Alloy 8 Compared To Zamak Alloy 3?

Zamak alloy 8 and Zamak alloy 3 both are from a group of alloys which has a base metal of zinc and alloying elements of aluminum, magnesium and copper.

Zamak alloy 8 is a good gravity casting alloy.

It is unexpectedly growing for pressure die casting.

Besides, it is commonly used for decorative applications and it contains more aluminum while Zamak alloy 3 has base composition for the Zamak alloys.

Also, it has long term dimensional stability and exceptional castability.

Most of zinc die casting in North America is made from Zamak 3.

What Benefits Do Zamak Alloy 8 Have?

Some of the main benefits include:

  • Zamak alloy 8 has high mechanical properties such as creep performance, firmness and better tensile strength.
  • Of all the hot chamber zinc die casting alloys Zamak alloy 8 is the brightest.
  • Zamak alloy 8 contains a lot more aluminum which is important to consider when selecting material for a component.
  • Zamak alloy 8 is perfect for decorative applications because of its perfect surface quality and finishing features.

Where Can You Use Zamak Alloy 8?

  • It can also be used for bearings
  • This alloy is suitable for most decorative uses.
  • Zamak alloy 8 can also be beneficial during die casting.

Which Chemical Properties Do Zamak Alloy 8 Have?

Zamak alloy 8 has the following chemical properties;

  • Zinc remainder
  • Aluminum 8
  • Copper 3
  • Iron 075
  • Magnesium 03
  • Lead 006
  • Cadmium 006
  • Tin 003

What Are The Characteristics Of Zamak Alloy 8?

Some of the main characteristics include:

  • Zamak alloy 8 is the only hot chamber zinc die casting alloy.
  • It was bloomed before as a lasting mold alloy and it has a perfect finishing and plating features.
  • Zamak alloy 8 has the highest creep strength.
  • Of all the hot chamber zinc die casting alloys Zamak alloy 8 is the lightest.

What Are Wear Properties For Modified Zamak Alloy 8 Compared To Conventional Bearing Bronze?

Bearing bronze has less wear resistance and mechanical properties compared to Zamak alloy 8.

Also, modified lead, tin and cadmium alloys which revealed higher wear resistance and good mechanical properties.

Compared to bronze alloy, Zamak based alloys are more water resistant at varying sliding speeds.

At all sliding speed bronze alloy has very high wear rates compared with Zamak 8 alloys.

Compared to the abrasion coefficient of Zamak alloy 8 and its modified alloys, bearing bronze is superior.

Zamak 8 based alloys showed increased wear resistance when subjected to varying sliding speeds compared to bearing bronze.

For any questions or inquiry about Zamak alloy 8 die casting or testing, contact us now.

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