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
| Element | Content (%) |
|---|---|
| Magnesium, Mg | 97.0 |
| Zinc, Zn | 2 – 2.6 |
| Zirconium, Zr | 0.45 – 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 |
