Aug 5 2013
Topics Covered
Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Introduction
Designers often prefer to work with magnesium alloys due to their characteristic low density. These alloys are also known to possess good high temperature mechanical properties and good to excellent corrosion resistance.
They 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.
The following datasheet gives an overview of magnesium ZH62A-T5 alloy.
Chemical Composition
The following table shows the chemical composition of magnesium ZH62A-T5 alloy.
|
Element |
Content (%) |
|
Magnesium, Mg |
92 |
|
Zinc, Zn |
5.2 - 6.2 |
|
Thorium, Th |
1.4-2.2 |
|
Copper, Cu |
≤0.10 |
|
Zirconium, Zr |
0.50 - 1.0 |
|
Nickel, Ni |
≤ 0.010 |
Physical Properties
The physical properties of magnesium ZH62A-T5 alloy are given in the following table.
|
Properties |
Metric |
Imperial |
|
Density |
1.86 g/cm³ |
0.0672 lb/in³ |
|
Melting point |
520-630°C |
968-1170°F |
Mechanical Properties
The mechanical properties of cast magnesium ZH62A-T5 are outlined in the following table.
|
Properties |
Metric |
Imperial |
|
Tensile strength |
240 MPa |
34800 psi |
|
Yield strength (@strain 0.200 %) |
170 MPa |
24700 psi |
|
Elastic modulus |
45 GPa |
6530 ksi |
|
Shear modulus |
17 GPa |
2470 ksi |
|
Poisson's ratio |
0.3 |
0.3 |
|
Elongation at break |
4% |
4% |
|
Hardness, Brinell |
70 |
70 |
|
Hardness, Knoop |
93 |
93 |
|
Hardness, Vickers |
80 |
80 |
|
Machinability |
100 |
100 |
Thermal Properties
The thermal properties of magnesium ZH62A-T5 alloy are highlighted in the following table.
|
Properties |
Metric |
Imperial |
|
Thermal expansion co-efficient (@20-200°C/68-392°F ) |
27 µm/m°C |
15 µin/in°F |
|
Thermal conductivity |
110 W/mK |
763 BTU in/hr.ft².°F |