Jul 15 2013
Topics Covered
Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Applications
Introduction
Magnesium is a silvery-white metal that is found in large deposits of dolomite, magnesite and other non-ferrous alloys. It tarnishes slightly when exposed to air. It also reacts exothermically with most acids such as hydrochloric acid. Magnesium alloys have good machining properties and corrosion resistance.
The following datasheet gives an overview of magnesium EA55RS-T4 alloy.
Chemical Composition
The following table shows the chemical composition of magnesium EA55RS-T4 alloy.
|
Element |
Content (%) |
|
Magnesium, Mg |
85 |
|
Zinc, Zn |
5 |
|
Aluminum, Al |
5 |
|
Neodymium, Nd |
4.9 |
Physical Properties
The physical properties of magnesium EA55RS-T4 alloy are given in the following table.
|
Properties |
Metric |
Imperial |
|
Density |
1.94 g/cm³ |
0.0701 lb/in³ |
Mechanical Properties
The mechanical properties of extruded magnesium EA55RS-T4 alloy are listed in the following table.
|
Properties |
Metric |
Imperial |
|
Tensile strength |
425 MPa |
61600 psi |
|
Yield strength |
370 MPa |
53700 psi |
|
Shear modulus (estimated from similar Mg alloys) |
17 GPa |
2470 ksi |
|
Elastic modulus (typical Mg alloy value in tension) |
45 GPa |
6530 ksi |
|
Poisson's ratio |
0.32 |
0.32 |
|
Elongation at break (in 50 mm) |
14% |
14% |
Applications
Magnesium EA55RS-T4 alloy is commonly used for aircraft applications.