Magnesium EQ-21A-T6 (UNS M18330)
EQ-21A-T6 is a high-performance magnesium alloy that is primarily used for sand and permanent mold castings. It is known for its excellent strength and stiffness, particularly at elevated temperatures.
| Chemical Composition | ||
|---|---|---|
| Element | Min | Max |
| Magnesium | Remainder | |
| Copper | 0.05% | 0.10% |
| Neodymium | 1.5% | 3.0% |
| Nickel | 0.01% | |
| Silver | 1.3% | 1.7% |
| Zirconium | 0.40% | 1.0% |
| Residuals | 0.30% | |
The following table provides a list of magnesium EQ-21A-T6 properties in both SI and US customary/Imperial units.
Click on the icon to switch between Metric and Imperial units.
| Physical Properties | Metric |
|---|---|
| Density | 1810 kg/m3 |
| Mechanical Properties | Metric |
| Tensile Strength (Ultimate) | 234 MPa |
| Tensile Strength (Yield) | 193 MPa |
| Compressive Strength (Ultimate) | 345 MPa |
| Compressive Strength (Yield) | 193 MPa |
| Fatigue Strength # of Cycles 1.0e+8 | 54 MPa |
| Young’s Modulus (E) | 45 GPa |
| Shear Modulus (G) | 17 GPa |
| Elongation at Break in 50 mm | 2% |
| Poisson’s Ratio (ν) | 0.35 |
| Brinell Hardness 500 kg load, 10 mm ball | 65 - 85 |
| Thermal Properties | Metric |
| Melting Point | 540 - 640 °C |
| Solidus | 540 °C |
| Liquidus | 640 °C |
| Thermal Conductivity | 113 W/m·K |
| Specific Heat Capacity (Cp) | 1000 J/kg·K |
| Coefficient of Thermal Expansion (αL) | 26.7 1/°C |
| Heat of Fusion | 374 J/g |
| Electrical Properties | Metric |
| Electrical Resistivity | 6.85×10-6 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 EQ-21A-T6
| Advantages | Disadvantages |
|---|---|
| Lightweight | Corrosion-prone |
| High strength | Poor machinability |
| Good weldability | High cost |
| Excellent thermal conductivity | Low melting point |
Applications of Magnesium EQ-21A-T6
Magnesium EQ-21A-T6 is a versatile and high-performance alloy that is used in a variety of applications, including:
- Aerospace: Magnesium EQ-21A-T6 is used in a variety of aircraft components, including landing gear, airframes, and engine parts.
- Automotive: Magnesium EQ-21A-T6 is used in a variety of automotive components, including engine blocks, cylinder heads, and brake rotors.
- Defense: Magnesium EQ-21A-T6 is used in a variety of military components, including helmets, body armor, and weapons.