Jul 29 2013
Topics Covered
Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Introduction
Magnesium alloys are easy to machine and are very lightweight. When magnesium is alloyed with other metals such as aluminum, zinc, silicon, and iron, magnesium alloys are derived. Magnesium AZ31B-F alloy is a medium strength alloy.
The following sections will discuss in detail about magnesium AZ31B-F alloy.
Chemical Composition
The chemical composition of magnesium AZ31B-F alloy is outlined in the following table.
|
Element |
Content (%) |
|
Magnesium, Mg |
97 |
|
Aluminum, Al |
2.5 - 3.5 |
|
Zinc, Zn |
0.60 - 1.4 |
|
Manganese, Mn |
≥ 0.20 |
|
Silicon, Si |
≤ 0.10 |
|
Copper, Cu |
≤ 0.050 |
|
Calcium, Ca |
≤ 0.040 |
|
Iron, Fe |
≤ 0.0050 |
|
Nickel, Ni |
≤ 0.0050 |
Physical Properties
The physical properties of magnesium AZ31B-F alloy are tabulated below.
|
Properties |
Metric |
Imperial |
|
Density |
1.77 g/cm3 |
0.0639 lb/in3 |
|
Melting point |
605 - 630°C |
1120 - 1170°F |
Mechanical Properties
The following table shows mechanical properties of magnesium AZ31B-F alloy.
|
Properties |
Metric |
Imperial |
|
Tensile strength |
260 MPa |
37700 psi |
|
Yield strength |
200 MPa |
29000 psi |
|
Poisson’s ratio |
0.35 |
0.35 |
|
Elastic modulus |
45 GPa |
6526 ksi |
|
Shear strength |
130 MPa |
18 ksi |
|
Elongation at break |
15% |
15% |
|
Hardness, Brinell |
49 |
49 |
Thermal Properties
The thermal properties of magnesium AZ31B-F alloy are tabulated below.
|
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 |
96 W/mK |
666 BTU in/hr.ft².°F |