ZK21A-F

Material Data Sheet

Magnesium ZK21A-F alloys have been developed in an effort to obtain mechanical properties that are halfway between magnesium AZ31B and ZK60A alloys; good weldability in contrast to magnesium ZK60A alloy and freedom from stress relief requirements in contrast to magnesium AZ31B alloy.

They are designated using the ASTM and SAE system in which the first part indicates the two main alloying elements in the alloy and the second part represents their percentages.

Chemical Composition

 

 

ElementContent (%)
Magnesium, Mg97.0
Zinc, Zn2 – 2.6
Zirconium, Zr0.45 – 0.80
Physical Properties
Properties Metric Imperial
Density 1.80 g/cm³ 0.0650 lb/in³
Mechanical Properties
Properties Metric Imperial
Tensile Strength 235 MPa 34100 psi
Yield Strength 180 MPa 26100 psi
Elongation at Break 4% 4%
Poissons Ratio 0.35 0.35
Elastic Modulus 44.8 GPa 6497 ksi

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