Aug 9 2013
Topics Covered
Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Applications
Introduction
Magnesium AM20 is a die-cast alloy with aluminum and manganese playing key roles. This alloy is known to possess high ductility and impact strength. The following sections will discuss in detail about magnesium AM20 cast alloy.
Chemical Composition
The chemical composition of magnesium AM20 cast alloy is outlined in the following table.
|
Element |
Content (%) |
|
Aluminum, Al |
1.7-2.5 |
|
Manganese, Mn |
0.20 min |
|
Zinc, Zn |
0.20 max |
|
Silicon, Si |
0.05 max |
|
Copper, Cu |
0.008 max |
|
Nickel, Ni |
0.001 max |
|
Iron, Fe |
0.004 max |
|
Others, each max |
0.01 max |
|
Magnesium, Mg |
Remainder |
Physical Properties
The physical properties of magnesium AM20 cast alloy are tabulated below.
|
Properties |
Metric |
Imperial |
|
Density |
1.75 g/cm3 |
0.063 lb/in3 |
Mechanical Properties
The following table shows mechanical properties of magnesium AM20 cast alloy.
|
Properties |
Metric |
Imperial |
|
Tensile strength |
190-210 MPa |
27.5-30.4 ksi |
|
Yield strength |
90 MPa |
13 ksi |
|
Elastic modulus |
45 GPa |
6526 ksi |
|
Elongation |
12-20% |
12-20% |
|
Hardness |
45 |
45 |
Thermal Properties
The thermal properties of magnesium AM20 cast alloy are tabulated below.
|
Properties |
Metric |
Imperial |
|
Thermal expansion co-efficient (@20-100°C/68-212°F) |
26 µm/m°C |
14.4 µin/in°F |
|
Thermal conductivity (@20°C/68°F) |
94 W/mK |
651 BTU in/hr.ft².°F |
Applications
Magnesium AM20 cast alloy is primarily used in automotive safety parts.