Magnesium AZ81A-T4 (UNS M11810)
AZ81A-T4 is a cast magnesium alloy that is known for its strength, ductility, and machinability. It is commonly used in a variety of applications, including automotive, aerospace, and marine.
| Chemical Composition | ||
|---|---|---|
| Element | Min | Max |
| Magnesium | Remainder | |
| Aluminum | 7.0% | 8.1% |
| Copper | 0.10% | |
| Manganese | 0.13% | |
| Nickel | 0.01% | |
| Silicon | 0.30% | |
| Zinc | 0.4% | 1.0% |
The following table provides a list of magnesium AZ81A-T4 properties in both SI and US customary/Imperial units.
Click on the icon to switch between Metric and Imperial units.
| Physical Properties | Metric |
|---|---|
| Density | 1800 kg/m3 |
| Mechanical Properties | Metric |
| Tensile Strength (Ultimate) | 275 MPa |
| Tensile Strength (Yield) | 83 MPa |
| Bearing Strength (Ultimate) | 400 MPa |
| Bearing Strength (Yield) | 240 MPa |
| Fatigue Strength # of Cycles 1.0e+8 | 76 MPa |
| Shear Strength | 125 MPa |
| Young’s Modulus (E) | 45 GPa |
| Shear Modulus (G) | 17 GPa |
| Elongation at Break in 50 mm | 15% |
| Poisson’s Ratio (ν) | 0.34 |
| Brinell Hardness 500 kg load, 10 mm ball | 55 |
| Knoop Hardness Converted from Brinell | 70 |
| Rockwell Hardness | 66 |
| Machinability | 100% |
| Charpy Impact V-notch | 6.10 J |
| Thermal Properties | Metric |
| Melting Point Incipient Melting | ≥ 421 °C |
| Solidus | 490 °C |
| Liquidus | 610 °C |
| Thermal Conductivity | 51.1 W/m·K |
| Specific Heat Capacity (Cp) | 1000 J/kg·K |
| Coefficient of Thermal Expansion (αL) | 25.0 1/°C |
| Heat of Fusion | 370 J/g |
| Electrical Properties | Metric |
| Electrical Resistivity | 1.50×10-5 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 AZ81A-T4
| Advantages | Disadvantages |
|---|---|
| Lightweight | Flammability |
| High strength-to-weight ratio | Susceptibility to environmental attack |
| Good formability | Limited temperature range |
| Enhanced corrosion resistance | Higher cost |
| Good heat dissipation | Specialized manufacturing requirements |
Applications of Magnesium AZ81A-T4
Magnesium AZ81A-T4 finds applications in various industries. Here are some common applications of Magnesium AZ81A-T4:
- Automotive industry: Magnesium AZ81A-T4 is used in automotive components to reduce weight and improve fuel efficiency.
- Aerospace industry: The aerospace sector benefits from the lightweight nature of Magnesium AZ81A-T4. It is used in the manufacturing of aircraft components such as seat frames, instrument panels, brackets, and structural elements.
- Consumer electronics: Magnesium AZ81A-T4 is employed in the production of lightweight consumer electronic devices such as laptops, tablets, and smartphones. It offers structural integrity and good heat dissipation properties, enhancing device performance.
- Handheld tools and equipment: The lightweight and strength-to-weight ratio of Magnesium AZ81A-T4 make it suitable for handheld tools and equipment. It is used in the construction of tool housings, handles, and frames.
- Sports equipment: Magnesium AZ81A-T4 is used in the production of sports equipment like bicycles, golf club heads, tennis racquets, and other lightweight sporting gear, where weight reduction and strength are crucial.
- Industrial machinery: Magnesium AZ81A-T4 can be found in various industrial machinery applications, including machine frames, housings, and equipment components, where its lightweight properties contribute to ease of handling and transportation.
- Medical devices: Magnesium alloys, including AZ81A-T4, are utilized in the medical industry for manufacturing lightweight, biocompatible devices such as surgical instruments, orthopedic implants, and prosthetics.