Magnesium AZ91E-T4 (UNS M11919)
AZ91E-T4 is a versatile magnesium alloy widely utilized in pressure-tight sand and permanent mold castings. It offers a balanced combination of high strength and good ductility, making it suitable for various engineering applications where lightweight and reliable material performance are essential.
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| Chemical Composition | ||
|---|---|---|
| Element | Min | Max |
| Magnesium | 88.5% | 91.2% |
| Aluminum | 8.1% | 9.3% |
| Copper | —— | 0.015% |
| Iron | —— | 0.005% |
| Manganese | 0.17% | 0.35% |
| Nickel | —— | 0.001% |
| Silicon | —— | 0.2% |
| Zinc | 0.4% | 1.0% |
| Other | —— | 0.3% |
The following table provides a list of magnesium AZ91E-T4 properties in both SI and US customary/Imperial units.
Click on the button 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
AZ91E-T4 serves diverse industries, providing lightweight and high-strength solutions for numerous uses, including:
- Automotive Components: Widely used in the automotive sector for lightweight structural parts such as engine blocks, transmission cases, intake manifolds, steering columns, and interior components.
- Aerospace and Aviation: Employed in aircraft structures, helicopter gearbox housings, and other aerospace applications where reducing weight without compromising strength is critical.
- Electronics and Electrical Devices: Utilized for casings of portable electronics like laptops, tablets, and smartphones, offering effective electromagnetic interference (EMI) shielding.
- Power Tools and Handheld Devices: Ideal for manufacturing durable and lightweight power tools such as drills, sanders, grinders, and handheld devices including cameras and camcorders.
- Sports Equipment: Used in producing sporting goods like bicycle frames, golf club heads, tennis rackets, and archery bows, enhancing performance through its strength and low weight.
- Medical Equipment: Applied in medical devices requiring weight reduction, including surgical instruments, orthopedic implants, and portable medical equipment.
- Industrial Applications: Suitable for machinery components, die castings, and tooling, valued for its machinability and mechanical strength.