Aug 13 2013
Topics Covered
Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Introduction
Magnesium alloys are chosen by many designers for their low density. Magnesium ZM21 alloy series has good forgeability, medium strength, and good damping capacity.
The following datasheet gives an overview of magnesium ZM21-0 alloy.
Chemical Composition
The following table shows the chemical composition of magnesium ZM21-0 alloy.
Element |
Content (%) |
Magnesium, Mg |
97.5 |
Zinc, Zn |
2 |
Manganese, Mn |
≥ 0.50 |
Physical Properties
The physical properties of magnesium ZM21-0 alloy are given in the following table.
Properties |
Metric |
Imperial |
Density |
1.79 g/cm³ |
0.0647 lb/in³ |
Mechanical Properties
The mechanical properties of sheet and plate magnesium ZM21-0 alloy are outlined in the following table.
Properties |
Metric |
Imperial |
Tensile strength |
241 MPa |
35000 psi |
Yield strength (@strain 0.200 %) |
117 MPa |
17000 psi |
Elongation at break |
11% |
11% |
Poisson's ratio |
0.35 |
0.35 |
Elastic modulus |
45 GPa |
6530 ksi |
Shear modulus |
17 GPa |
2470 ksi |
Thermal Properties
The thermal properties of magnesium ZM21-0 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 |