May 27 2013
Topics Covered
Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Other Designations
Applications
Introduction
Magnesium (Mg) has the atomic number 12. It is a widely used metal, and is found in over 60 minerals.
Magnesium alloys are used in many engineering applications where light weight feature is a major advantage. Magnesium AZ91E-T6 is a cast alloy. It is a general purpose alloy with high strength.
The following datasheet gives an overview of magnesium AZ91E-T6 alloy.
Chemical Composition
The following table shows the chemical composition of magnesium AZ91E-T6 alloy.
|
Element |
Content (%) |
|
Magnesium, Mg |
88.51 - 91.22 |
|
Aluminum, Al |
8.1 - 9.3 |
|
Zinc, Zn |
0.40 - 1 |
|
Silicon, Si |
≤ 0.20 |
|
Manganese, Mn |
0.17 - 0.35 |
|
Copper, Cu |
≤ 0.015 |
|
Nickel, Ni |
≤ 0.0010 |
|
Iron, Fe |
≤ 0.0050 |
Physical Properties
The physical properties of magnesium AZ91E-T6 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-T6 alloy are outlined in the following table.
|
Properties |
Metric |
Imperial |
|
Tensile strength |
275 MPa |
39900 psi |
|
Yield strength (@strain 0.200 %) |
145 MPa |
21000 psi |
|
Elastic modulus |
44.8 GPa |
6500 ksi |
|
Shear modulus |
17 GPa |
2470 ksi |
|
Poisson's ratio |
0.35 |
0.35 |
|
Elongation at break (in 50mm) |
6% |
6% |
|
Hardness, Brinell |
70 |
70 |
|
Hardness, Knoop (estimated from Brinell) |
93 |
93 |
|
Hardness, Rockwell E |
77 |
77 |
|
Hardness, Vickers (estimated from Brinell) |
80 |
80 |
Thermal Properties
The thermal properties of magnesium AZ91E-T6 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-T6 alloy are listed below:
-
EN 1753 MC 21120
-
AMS 4446
-
ASTM B 94
-
SAE J465
Applications
The following are the applications of magnesium AZ91E-T6 alloy:
-
In pressure-tight sand and permanent mold castings with medium yield strength and high tensile strength.