Magnesium AZ91E-T4 (UNS M11919)
AZ91E-T4 is a magnesium alloy that is commonly used in pressure-tight sand and permanent mold castings. It is a general purpose alloy with high strength and good ductility.
| Chemical Composition | ||
|---|---|---|
| Element | Min | Max |
| Magnesium | 88.51% | 91.22% |
| Aluminum | 8.1% | 9.3% |
| Copper | 0.015% | |
| Iron | 0.005% | |
| Manganese | 0.17% | 0.35% |
| Nickel | 0.001% | |
| Silicon | 0.20% | |
| Zinc | 0.4% | 1.0% |
| Other | 0.30% | |
The following table provides a list of magnesium AZ91E-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 | 1810 kg/m3 |
| Mechanical Properties | Metric |
| Tensile Strength (Ultimate) | 275 MPa |
| Tensile Strength (Yield) | 90 MPa |
| Bearing Strength (Ultimate) | 415 MPa |
| Bearing Strength (Yield) | 305 MPa |
| Fatigue Strength # of Cycles 5.0e+8 | 85 MPa |
| Young’s Modulus (E) | 44.8 GPa |
| Shear Modulus (G) | 17 GPa |
| Elongation at Break in 50 mm | 15% |
| Poisson’s Ratio (ν) | 0.35 |
| Brinell Hardness 500 kg load, 10 mm ball | 55 |
| Knoop Hardness Converted from Brinell | 70 |
| Rockwell Hardness | 62 |
| Charpy Impact V-notch | 4.10 J |
| Thermal Properties | Metric |
| Melting Point Incipient Melting | ≥ 421 °C |
| Solidus | 470 °C |
| Liquidus | 595 °C |
| Thermal Conductivity | 72.7 W/m·K |
| Specific Heat Capacity (Cp) | 1047 J/kg·K |
| Coefficient of Thermal Expansion (αL) | 26.0 1/°C |
| Heat of Fusion | 373 J/g |
| Electrical Properties | Metric |
| Electrical Resistivity | 1.70×10-5 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 AZ91E-T4
| Advantages | Disadvantages |
|---|---|
| Lightweight | Corrosion Susceptibility |
| High Strength | Limited Temperature Range |
| Good Machinability | Higher Cost |
| Good Damping Capacity | Fire Hazard |
| Good Shielding Properties |
Applications of Magnesium AZ91E-T4
Magnesium AZ91E-T4 has a range of applications across various industries. Here are some common applications of this alloy:
- Automotive Components: Magnesium AZ91E-T4 is widely used in the automotive industry for lightweight structural components. It can be found in parts such as engine blocks, transmission cases, intake manifolds, steering columns, and various interior components.
- Aerospace and Aviation: The aerospace sector utilizes magnesium AZ91E-T4 for components that require lightweight materials with high strength. It is used in aircraft structures, helicopter gearbox housings, and other aerospace applications where weight reduction is critical.
- Electronics and Electrical Devices: Magnesium AZ91E-T4 is used in the electronics industry for casings of portable devices, such as laptops, tablets, and smartphones. Its good shielding properties make it suitable for electromagnetic interference (EMI) shielding applications.
- Power Tools and Handheld Devices: The lightweight and durable properties of Magnesium AZ91E-T4 make it suitable for power tools, such as drills, sanders, and grinders, as well as handheld devices like cameras and camcorders.
- Sports Equipment: This magnesium alloy is employed in the manufacturing of sporting goods and equipment, including bicycle frames, golf club heads, tennis rackets, and archery bows. Its lightweight nature and strength contribute to improved performance.
- Medical Equipment: Magnesium AZ91E-T4 finds applications in medical devices and equipment, particularly where weight reduction is desired, such as surgical instruments, orthopedic implants, and portable medical devices.
- Industrial Applications: It is used in various industrial applications, such as machinery components, die castings, and tooling. Its machinability and strength make it suitable for these purposes.