Magnesium ZK40A-T5 Alloy (UNS M16400)

Aug 5 2013

Topics Covered

Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties

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 ZK40A-T5 is a high strength alloy, and is more extrudable than magnesium ZK60A. This alloy however is not weldable.

The following datasheet gives an overview of magnesium ZK40A-T5 alloy.

Chemical Composition

The following table shows the chemical composition of magnesium ZK40A-T5 alloy.

Element Content (%)
Magnesium, Mg 95
Zinc. Zn 3.5 - 4.5
Zirconium, Zr ≥ 0.45

Physical Properties

The physical properties of magnesium ZK40A-T5 alloy are given in the following table.

Properties Metric Imperial
Density 1.82 g/cm3 0.0658 lb/in3

Mechanical Properties

The mechanical properties of extruded magnesium ZK40A-T5 alloy are outlined in the following table.

Properties Metric Imperial
Tensile strength 276 MPa 40000 psi
Yield strength (@strain 0.200 %) 255 MPa 37000 psi
Elongation at break 4% 4%
Poisson's ratio 0.35 0.35
Elastic modulus 45.0 GPa 6530 ksi
Shear modulus 17.0 GPa 2470 ksi

Thermal Properties

The thermal properties of magnesium ZK40A-T5 alloy are highlighted in the following table.

Properties Metric Imperial
Thermal expansion co-efficient (@0.000-100°C/32-212°F) 26.0 µm/m°C 14.4 µin/in°F
Thermal conductivity 110 W/mK 763 BTU in/hr.ft².°F

 

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