Jul 29 2013
Topics Covered
Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Other Designations
Introduction
The magnesium Azxx alloy series is the most widely used series based on magnesium. These alloys have moderate strength, good ductility and toughness. They can be cast, formed, and forged.
The following sections will discuss in detail about magnesium AZ91A-F die cast alloy.
Chemical Composition
The chemical composition of magnesium AZ91A-F alloy is outlined in the following table.
|
Element |
Content (%) |
|
Aluminum, Al |
9 |
|
Zinc, Zn |
0.70 |
|
Manganese, Mn |
0.13 |
|
Magnesium, Mg |
Remainder |
Physical Properties
The physical properties of magnesium AZ91A-F alloy are tabulated below.
|
Properties |
Metric |
Imperial |
|
Density |
1.81 g/cm3 |
0.0654 lb/in3 |
|
Melting point |
≥ 421 °C |
≥ 790 °F |
Mechanical Properties
The following table shows mechanical properties of magnesium AZ91A-F alloy.
|
Properties |
Metric |
Imperial |
|
Tensile strength |
230 MPa |
33400 psi |
|
Yield strength |
150 MPa |
21800 psi |
|
Poisson’s ratio |
0.35 |
0.35 |
|
Elastic modulus |
44.8 GPa |
6500 ksi |
|
Elongation |
3% |
3% |
|
Hardness, Brinell |
63 |
63 |
|
Hardness, Knoop |
84 |
84 |
|
Hardness, Rockwell E |
75 |
75 |
|
Hardness, Vickers |
71 |
71 |
|
Machinability |
100 |
100 |
Thermal Properties
The thermal properties of magnesium AZ91A-F alloy are tabulated below.
|
Properties |
Metric |
Imperial |
|
Thermal expansion co-efficient (@0.000-100°C/32-212°F) |
26.0 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 AZ91A-F alloy are as follows:
-
AMS 4490
-
ASTM B 94
-
SAE J465
-
ASTM A276
-
ASTM A580
-
ASTM A412