Jun 26 2013
Topics Covered
Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Other Designations
Applications
Introduction
Magnesium is the fourth most common element in the Earth as a whole, and makes up 13% of the Earth’s mass. It is the third most commonly used structural metal, after iron and aluminium.
Magnesium alloys are known to be light in weight, and possess low density, good high temperature mechanical properties, and good to excellent corrosion resistance
Magnesium AZ91E-F alloy is a cast alloy type. The following datasheet gives an overview of magnesium AZ91E-F alloy.
Chemical Composition
The following table shows the chemical composition of magnesium AZ91E-F alloy.
|
Element |
Content (%) |
|
Magnesium, Mg |
88.51 - 91.22 |
|
Aluminum, Al |
8.1 - 9.3 |
|
Zinc, Zn |
0.40 - 1.0 |
|
Silicon, Si |
≤ 0.20 |
|
Manganese, Mn |
0.17 - 0.35 |
|
Copper, Cu |
≤ 0.015 |
|
Iron, Fe |
≤ 0.0050 |
|
Nickel, Ni |
≤ 0.0010 |
|
Other, total |
≤ 0.30 |
Physical Properties
The physical properties of magnesium AZ91E-F alloy are given in the following table.
|
Properties |
Metric |
Imperial |
|
Density |
1.81 g/cm³ |
0.0654 lb/in³ |
|
Melting point |
≥ 421 °C |
≥ 790 °F |
Mechanical Properties
The mechanical properties of magnesium AZ91E-F alloy are outlined in the following table.
|
Properties |
Metric |
Imperial |
|
Tensile strength |
165 MPa |
23900 psi |
|
Yield strength (@strain 0.200 %) |
97 MPa |
14100 psi |
|
Elastic modulus |
45 GPa |
6530 ksi |
|
Shear modulus |
17 GPa |
2470 ksi |
|
Poisson's ratio |
0.35 |
0.35 |
|
Elongation at break (in 50mm) |
2.50% |
2.50% |
|
Hardness, Brinell |
63 |
63 |
|
Hardness, Knoop (estimated from Brinell) |
84 |
84 |
|
Hardness, Rockwell E |
66 |
66 |
|
Hardness, Vickers (estimated from Brinell) |
71 |
71 |
Thermal Properties
The thermal properties of magnesium AZ91E-F 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 |
72.7 W/mK |
505 BTU in/hr.ft².°F |
Other Designations
Equivalent materials to magnesium AZ91E-F alloy are listed below:
-
EN 1753 MC 21120
-
AMS 4490
-
ASTM B 94
-
SAE J465
-
MIL-R-6944
-
DIN 3.5103
Applications
The following are the applications of magnesium AZ91E-F alloy:
-
Aerospace casting applications
-
In pressure-tight sand and permanent mold castings with moderate yield strength and high tensile strength.