Magnesium ZK61A-T6 Alloy (UNS M16611)

Aug 5 2013

Topics Covered

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

Introduction

Magnesium alloys are preferred by many designers due to their low density. These alloys are also known to have good high temperature mechanical properties and good to excellent corrosion resistance.

Magnesium ZK61A-T6 alloy has better yield strength than ZK61A-T5. It has good room-temperature strength and ductility.

The following datasheet gives an overview of magnesium ZK61A- T6 alloy.

Chemical Composition

The following table shows the chemical composition of magnesium ZK61A- T6 alloy.

Element Content (%)
Magnesium, Mg 92.1-93.9
Zinc. Zn 5.5-6.5
Zirconium, Zr 0.60-1
Copper, Cu ≤ 0.10
Nickel, Ni ≤ 0.010
Remainder ≤ 0.30

Physical Properties

The physical properties of magnesium ZK61A- T6 alloy are given in the following table.

Properties Metric Imperial
Density 1.83 g/cm³ 0.0661 lb/in³
Melting point 520 - 635 °C 968 - 1180 °F

Mechanical Properties

The mechanical properties of magnesium ZK61A- T6 cast alloy are outlined in the following table.

Properties Metric Imperial
Tensile strength 310 MPa 45000 psi
Yield strength (@strain 0.200 %) 195 MPa 28300 psi
Elongation at break 10% 10%
Poisson's ratio 0.35 0.35
Elastic modulus 45 GPa 6530 ksi
Shear modulus 17 GPa 2470 ksi
Hardness, Brinell 70 70
Hardness, Knoop 93 93
Hardness, Vickers 80 80
Machinability 100 100

Thermal Properties

The thermal properties of magnesium ZK61A- T6 alloy are highlighted in the following table.

Properties Metric Imperial
Thermal expansion co-efficient (@0.000-100°C/32-212°F) 27 µm/m°C 15 µin/in°F
Thermal conductivity 120 W/mK 833 BTU in/hr.ft².°F

Fabrication

Magnesium ZK61A- T6 alloy is solution treated and then artificially aged.

Other Designations

The other designations used to denote magnesium ZK61A- T6 alloy are listed below:

  • AMS 4444
  • ASTM B 80
  • SAE J465

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