Topics CoveredIntroductionChemical CompositionPhysical PropertiesMechanical PropertiesThermal PropertiesOther DesignationsFabrication and Heat Treatment Machinability Forming Welding Heat Treatment Hot Working AgingApplications
Magnesium is a silvery-white metal which is used as an alloy element for zinc, lead, aluminum, and other nonferrous alloys. Magnesium alloys are designated using the ASTM and SAE system in which the first part denotes the two main alloying elements in the alloy and the second part represents their percentages. They are light weight and have high machinability. They are anodized to enhance their corrosion resistance property.
Magnesium ZK60A alloy is a heat treatable magnesium alloy. It has higher ductility than magnesium AZ60A alloy.
The following datasheet gives an overview of magnesium ZK60A alloy.
The following table shows the chemical composition of magnesium ZK60A alloy.
The physical properties of magnesium ZK60A alloy are given in the following table.
The mechanical properties of extruded magnesium ZK60A alloy are listed in the following table.
|Yield strength (@ strain 0.200%)
|Compressive yield strength (at 0.2% offset)
|Ultimate bearing strength
|Bearing yield strength
|Shear modulus (typical for steel)
|Elongation at break (in 50 mm)
|Hardness, Brinell (500 kg load, 10 mm ball)
|Hardness, Knoop (estimated from Brinell)
|Hardness, Rockwell A (estimated from Brinell)
|Hardness, Rockwell B (estimated from Brinell)
|Hardness, Vickers (estimated from Brinell)
|Machinability (relative rating, 100=best)
The following table outlines the thermal properties of magnesium ZK60A alloy.
|Thermal expansion co-efficient (@ 0-100°C/32-212°F)
||833 BTU in/hr.ft².°F|
Other designations that are equivalent to magnesium ZK60A alloy include:
Fabrication and Heat Treatment
Magnesium ZK60A alloy has high machinability. It is flammable and a lubricant is used to perform this operation. The machinist is required to constantly monitor the operation with a magnesium fire arresting kit.
Magnesium ZK60A alloy can be formed by preheating at 260°C (500°F).
Magnesium ZK60A alloy can be welded using resistance welding method. Arc welding method is not preferred for welding this alloy.
Magnesium ZK60A alloy is heat treated at 499°C (930°F) for 2 h followed by quenching in hot or warm water.
Magnesium ZK60A alloy can be hot worked at 260°C (500°F).
Magnesium ZK60A alloy is aged at 149°C (300°F) for 24 h.
Magnesium ZK60A alloy is used in different aircraft applications such as brake housings, instrumentation bodies, landing gear, ribs and spars.