Magnesium AZ31B-F (UNS M11311)
AZ31B-F is a medium-strength magnesium alloy that is commonly used in aerospace and automotive applications. It is known for its good weldability, corrosion resistance, and strength-to-weight ratio.
| Chemical Composition | ||
|---|---|---|
| Element | Min | Max |
| Magnesium | Remainder | |
| Aluminum | 2.5% | 3.5% |
| Calcium | 0.04% | |
| Copper | 0.05% | |
| Iron | 0.005% | |
| Manganese | 0.20% | |
| Nickel | 0.005% | |
| Silicon | 0.10% | |
| Zinc | 0.6% | 1.4% |
The following table provides a list of magnesium AZ31B-F properties in both SI and US customary/Imperial units.
Click on the icon to switch between Metric and Imperial units.
| Physical Properties | Metric |
|---|---|
| Density | 1770 kg/m3 |
| Mechanical Properties | Metric |
| Tensile Strength (Ultimate) | 260 MPa |
| Tensile Strength (Yield) | 200 MPa |
| Compressive Strength (Yield) | 97 MPa |
| Bearing Strength (Ultimate) | 385 MPa |
| Bearing Strength (Yield) | 230 MPa |
| Shear Strength | 130 MPa |
| Young’s Modulus (E) | 45 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 | 49 |
| Charpy Impact V-notch | 4.30 J |
| Thermal Properties | Metric |
| Melting Point | 605 - 630 °C |
| Solidus | 605 °C |
| Liquidus | 630 °C |
| Thermal Conductivity | 96 W/m·K |
| Specific Heat Capacity (Cp) | 1000 J/kg·K |
| Coefficient of Thermal Expansion (αL) | 26.0 1/°C |
| Heat of Fusion | 340 J/g |
| Electrical Properties | Metric |
| Electrical Resistivity | 9.20×10-6 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 AZ31B-F
| Advantages | Disadvantages |
|---|---|
| Lightweight: Low density | Corrosion susceptibility in certain environments |
| High strength-to-weight ratio | Limited elevated temperature applications |
| Good machinability | Limited weldability |
| Good damping capacity | Higher cost compared to some other alloys |
Applications of Magnesium AZ31B-F
Magnesium AZ31B-F is a versatile alloy that finds application in various industries. Here are some common applications of Magnesium AZ31B-F:
- Automotive Industry: Magnesium AZ31B-F is used in the automotive sector for lightweight components. It is commonly employed in the manufacturing of engine parts, transmission cases, instrument panels, steering columns, and other structural components.
- Aerospace Industry: Magnesium AZ31B-F is utilized in the aerospace industry for lightweight structural components. It can be found in aircraft seats, frames, brackets, and other parts where weight reduction is critical for achieving fuel efficiency and enhancing performance.
- Electronics: The alloy is used in electronic devices and consumer electronics due to its excellent electromagnetic shielding properties. It is employed in the production of laptops, tablets, smartphones, and other electronic casings.
- Sports Equipment: Magnesium AZ31B-F is used in the manufacturing of sports equipment such as tennis rackets, baseball bats, golf club heads, and bicycle frames. Its lightweight nature and good damping capacity make it suitable for improving performance in these applications.
- Medical Applications: The alloy is utilized in medical devices and equipment, including surgical instruments and lightweight orthopedic implants. Its biocompatibility and good dimensional stability make it suitable for such applications.
- Industrial Applications: Magnesium AZ31B-F is employed in various industrial applications, including machinery components, tooling, and jigs. Its good machinability allows for easy fabrication and shaping of intricate parts.