Magnesium ZK21A (UNS M16210)
ZK21A is a premium magnesium alloy known for its exceptional strength-to-weight ratio and corrosion resistance. Commonly utilized in aerospace and automotive industries, it provides lightweight durability and reliable performance in demanding environments, making it a preferred choice for structural and engineering applications.
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| Chemical Composition | ||
|---|---|---|
| Element | Min | Max |
| Magnesium | —— | Remainder |
| Zinc | 2.0% | 2.6% |
| Zirconium | 0.45% | 0.80% |
The following table provides a list of magnesium ZK21A properties in both SI and US customary/Imperial units.
Click on the button to switch between Metric and Imperial units.
| Physical Properties | Metric |
|---|---|
| Density | 1800 kg/m3 |
| Mechanical Properties | Metric |
| Tensile Strength (Ultimate) | 235 - 260 MPa |
| Tensile Strength (Yield) | 180 - 195 MPa |
| Elongation at Break | 4% |
| Thermal Properties | Metric |
| Melting Point | 600 - 635 °C |
| Solidus | 600 °C |
| Liquidus | 635 °C |
| Thermal Conductivity | 125 W/m·K |
| Specific Heat Capacity (Cp) | 960 J/kg·K |
| Coefficient of Thermal Expansion (αL) | 27 1/°C |
| Electrical Properties | Metric |
| Electrical Resistivity | 5.50×10-6 Ω·cm |
The values in this table are approximate and can vary depending on various factors such as the specific manufacturing process and heat treatment applied to the alloy.
Advantages & Disadvantages of Magnesium ZK21A
| Advantages | Disadvantages |
|---|---|
| Lightweight | High cost |
| High strength | Low melting point |
| Good weldability | Difficult to machine |
| Corrosion resistant |
Applications of Magnesium ZK21A
ZK21A is a versatile alloy with a wide range of applications, including:
- Aircraft: Used in parts such as landing gear, wing spars, and fuselage panels.
- Automotive: Applied in components including engine blocks, pistons, and brake rotors.
- Electronics: Utilized in housings, heat sinks, and circuit boards.
- Marine: Found in boat hulls, propellers, and winches.
- Medical: Incorporated in implants, surgical instruments, and medical equipment.
- Sporting goods: Used in bicycles, golf clubs, and fishing rods.