Aug 5 2013
Topics Covered
Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Introduction
Magnesium alloys are preferred by many designers because of their low density. Magnesium EQ21-T6 alloy has high yield strengths up to 200°C (392°F) and are sand and permanent-mold cast.
The following datasheet gives an overview of magnesium EQ21-T6 alloy.
Chemical Composition
The following table shows the chemical composition of magnesium EQ21-T6 cast alloy.
|
Element |
Content (%) |
|
Magnesium, Mg |
96 |
|
Neodymium, Nd |
1.75-2.5 |
|
Silver, Ag |
1.3-1.7 |
|
Zirconium, Zr |
0.40-1 |
|
Copper, Cu |
0.050-0.10 |
|
Nickel, Ni |
≤ 0.010 |
Physical Properties
The physical properties of magnesium EQ21-T6 alloy are given in the following table.
|
Properties |
Metric |
Imperial |
|
Density |
1.81 g/cm³ |
0.0654 lb/in³ |
|
Melting point |
540-640°C |
1000-1180°F |
Mechanical Properties
The mechanical properties of magnesium EQ21-T6 cast alloy are outlined in the following table.
|
Properties |
Metric |
Imperial |
|
Tensile strength |
235 MPa |
34100 psi |
|
Yield strength (@strain 0.200 %) |
170 MPa |
24700 psi |
|
Elongation at break |
2% |
2% |
|
Poisson's ratio |
0.35 |
0.35 |
|
Elastic modulus |
45 GPa |
6530 ksi |
|
Shear modulus |
17 GPa |
2470 ksi |
|
Hardness, Brinell |
70 |
70 |
|
Hardness, Knoop |
93 |
93 |
|
Hardness, Vickers |
80 |
80 |
|
Machinability |
100 |
100 |
Thermal Properties
The thermal properties of magnesium EQ21-T6 alloy are highlighted in the following table.
|
Properties |
Metric |
Imperial |
|
Thermal expansion co-efficient (@0.000-100°C/32-212°F) |
26.7 µm/m°C |
14.8 µin/in°F |
|
Thermal conductivity |
113 W/mK |
784 BTU in/hr.ft².°F |