Aug 5 2013
Topics Covered
Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Other Designations
Fabrication
Applications
Introduction
Magnesium ZK60A is a wrought magnesium base alloy containing zirconium and zinc. The alloy has increased strength obtained by artificial aging from the as-fabricated form. Magnesium ZK60A-T5 alloy has the best combination of strength and ductility at room temperature of all the wrought magnesium alloys.
The following datasheet gives an overview of magnesium ZK60A-T5 alloy.
Chemical Composition
The following table shows the chemical composition of magnesium ZK60A-T5 alloy.
|
Element |
Content (%) |
|
Magnesium, Mg |
94 |
|
Zinc. Zn |
4.8 - 6.2 |
|
Zirconium, Zr |
≥ 0.45 |
Physical Properties
The physical properties of magnesium ZK60A-T5 alloy are given in the following table.
|
Properties |
Metric |
Imperial |
|
Density |
1.83 g/cm3 |
0.0661 lb/in3 |
Mechanical Properties
The mechanical properties of magnesium ZK60A-T5 forgings alloy are outlined in the following table.
|
Properties |
Metric |
Imperial |
|
Tensile strength |
305 MPa |
44200 psi |
|
Yield strength (@strain 0.200 %) |
215 MPa |
31200 psi |
|
Elongation at break |
16% |
16% |
|
Poisson's ratio |
0.35 |
0.35 |
|
Elastic modulus |
45 GPa |
6530 ksi |
|
Shear modulus |
17 GPa |
2470 ksi |
|
Machinability |
100 |
100 |
Thermal Properties
The thermal properties of magnesium ZK60A-T5 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 |
|
Thermal conductivity |
120 W/mK |
833 BTU in/hr.ft².°F |
Other Designations
The other designations used to denote magnesium ZK60A-T5 alloy are listed below:
-
AMS 4362
-
ASTM B91
-
Federal QQ-M-40
Fabrication
As-fabricated forgings of magnesium ZK60A-T5 alloy can be converted to the precipitation treated temper (T5) by heating to 150°C (302°F) for 24h, followed by air cooling. Magnesium ZK60A can be machined easily and quickly. Regular chromating, plating, anodizing and finish treatments can be easily applied to this alloy. Magnesium ZK60A cannot be welded by traditional techniques because of hot-shortness cracking.
Applications
The following are the uses of magnesium ZK60A-T5 alloy:
-
High strength parts for use in elevated temperatures of 150°C (302°F)
-
In areas requiring pressure tightness or machinability
-
High strength parts for helicopters, satellites, rotor hubs, roadwheels, bicycle frames, missile frames, brake housings and landing gear struts