ZA8 Zinc-Aluminum Alloy

Aug 6 2013

Topics Covered

Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Other Designations
Applications

Introduction

Zinc aluminum (ZA) alloys are alloys with zinc as the base metal with higher concentrations of aluminum than traditional zinc alloys. Other metals that are present on these alloys are magnesium and copper. The concentration of aluminum in the alloy is represented in the number of the alloy, for e.g. ZA27 means the aluminum percentage is 27.

Zinc aluminum alloys are high performance alloys that exhibit good strength and hardness. They also show good wear resistant properties when compared to zinc or aluminum alloys. Some of the common zinc-aluminum alloys are ZA8, ZA12 and ZA27. Another class of zinc aluminum alloys is ZAMAK alloys.

ZA8 alloy is a die cast alloy with short freezing and excellent fluidity during die casting. It is suitable for use in thin wall components due to its good hardness, strength and pressure tightness. This datasheet will elaborate on the chemical composition and properties of ZA8 alloy.

Chemical Composition

The chemical composition of zinc-aluminum ZA8 alloy is given in the following table.

Element Content (%)
Zinc,Zn Remainder
Aluminum,Al 8.8
Copper, Cu 1.3
Iron, Fe 0.075
Magnesium, Mn 0.03
Lead, Pb 0.006
Cadmium, Cd 0.006
Tin, Sn 0.003

Physical Properties

The following table discusses the physical properties of zinc-aluminum ZA8 alloy.

Properties Metric Imperial
Density 6.3 gm/cm3 0.227 lb/in3

Mechanical Properties

The mechanical properties of zinc-aluminum ZA8 alloy are tabulated below.

Properties Metric Imperial
Tensile strength 263 MPa 38 ksi
Yield strength 200 MPa 29 ksi
Modulus of elasticity 85.5 GPa 12400 ksi
Poisson’s ratio 0.29 0.29

Other Designations

Some of the other designations that are used to denote zinc-aluminum ZA8 alloy are as below:-

  • AC43A
  • Z35636

Applications

The zinc-aluminum ZA8 alloy is used in the following applications:

  • Bearings
  • Die casting
  • Thin wall decorations

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