Magnesium ZK51A-T5 Alloy (UNS M16510)

Aug 5 2013

Topics Covered

Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Other Designations
Fabrication
Applications

Introduction

Magnesium alloys are designated using the ASTM and SAE system, in which the first part indicates the two main alloying elements in the alloy and the second part represents their percentages.

Magnesium ZK51A-T5 alloy has good room-temperature strength, high yield strength, and good ductility, though is relatively expensive. 

The following datasheet gives an overview of magnesium ZK51A-T5 alloy.

Chemical Composition

The following table shows the chemical composition of magnesium ZK51A-T5 alloy.

Element Content (%)
Magnesium, Mg 95
Zinc, Zn 3.6- 5.5
Zirconium, Zr 0.50-1
Copper, Cu ≤ 0.10
Nickel, Ni ≤ 0.010

Physical Properties

The physical properties of magnesium ZK51A-T5 alloy are given in the following table.

Properties Metric Imperial
Density 1.83 g/cm3 0.0661 lb/in3

Mechanical Properties

The mechanical properties of cast magnesium ZK51A-T5 alloy are outlined in the following table.

Properties Metric Imperial
Tensile strength 205 MPa 29700 psi
Yield strength (@strain 0.200 %) 165 MPa 23900 psi
Elongation at break 3.5% 3.5 %
Poisson's ratio 0.35 0.35
Elastic modulus 45.0 GPa 6530 ksi
Shear modulus 17.0 GPa 2470 ksi
Hardness, Brinell 65 65
Hardness, Knoop 88 88
Hardness, Rockwell E 72 72
Hardness, Vickers 75 75
Machinability 100 100

Thermal Properties

The thermal properties of magnesium ZK51A-T5 alloy are highlighted in the following table.

Properties Metric Imperial
Thermal expansion co-efficient (@0.000-100°C/32-212°F) 26 µm/m°C 14.4 µin/in°F
Thermal conductivity 110 W/mK 763 BTU in/hr.ft².°F

Other Designations

The other designations used to denote magnesium ZK51A-T5 alloy are listed below:

  • AMS 4443
  • ASTM B 80
  • SAE J465

Fabrication

Heat treatment recommended for magnesium ZK51A-T5 alloy is artificial aging.

Applications

Magnesium ZK51A-T5 alloy are used in the following sectors:

  • Aerospace and military sectors for highly stressed aerospace castings and military castings of uniform cross-section

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