Magnesium AZ92A-T4 (UNS M11920)
AZ92A-T4 is a magnesium alloy that is commonly used in sand and permanent mold castings. It has high tensile strength and good yield strength, and it is also resistant to corrosion.
| Chemical Composition | ||
|---|---|---|
| Element | Min | Max |
| Magnesium | Remainder | |
| Aluminum | 8.3% | 9.7% |
| Copper | 0.25% | |
| Manganese | 0.10% | |
| Nickel | 0.01% | |
| Silicon | 0.30% | |
| Zinc | 1.6% | 2.4% |
The following table provides a list of magnesium AZ92A-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 | 1830 kg/m3 |
| Mechanical Properties | Metric |
| Tensile Strength (Ultimate) | 275 MPa |
| Tensile Strength (Yield) | 97 MPa |
| Bearing Strength (Ultimate) | 470 MPa |
| Bearing Strength (Yield) | 315 MPa |
| Fatigue Strength # of Cycles 1.0e+8 | 40 MPa |
| Shear Strength | 140 MPa |
| Young’s Modulus (E) | 45 GPa |
| Shear Modulus (G) | 17 GPa |
| Elongation at Break in 50 mm | 10% |
| Poisson’s Ratio (ν) | 0.35 |
| Brinell Hardness 500 kg load, 10 mm ball | 63 |
| Knoop Hardness Converted from Brinell | 84 |
| Rockwell Hardness | 75 |
| Vickers Hardness Converted from Brinell | 70 |
| Machinability | 100% |
| Charpy Impact V-notch | 2.70 J |
| Thermal Properties | Metric |
| Melting Point Incipient Melting | ≥ 410 °C |
| Solidus | 445 °C |
| Liquidus | 595 °C |
| Thermal Conductivity | 44.3 W/m·K |
| Specific Heat Capacity (Cp) | 1050 J/kg·K |
| Coefficient of Thermal Expansion (αL) | 26.0 1/°C |
| Heat of Fusion | 373 J/g |
| Electrical Properties | Metric |
| Electrical Resistivity | 1.68×10-5 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 AZ92A-T4
| Advantages | Disadvantages |
|---|---|
| Lightweight | Corrosion susceptibility |
| High strength-to-weight ratio | Reactivity |
| Good weldability | Higher cost |
| Good castability | Limited availability |
| Good damping capacity | Limited temperature range |
| Recyclable | Lower stiffness |
Applications of Magnesium AZ92A-T4
Magnesium AZ92A-T4 has a range of applications in various industries. Some common applications of this magnesium alloy include:
- Aerospace: AZ92A-T4 is used in aerospace applications where lightweight materials with high strength are required.
- Automotive: The lightweight nature of AZ92A-T4 makes it suitable for automotive applications. It is used in the production of engine components, transmission cases, instrument panels, steering columns, and various other parts where weight reduction is desirable.
- Sporting Goods: Magnesium alloys are favored in sporting goods due to their lightweight and high strength properties. AZ92A-T4 can be found in the manufacturing of bicycle frames, golf club heads, tennis racquets, and other sports equipment.
- Industrial Equipment: AZ92A-T4 is used in various industrial equipment, such as machinery frames, robotic components, and fixtures, where a combination of strength and reduced weight is advantageous.
- Electronics: The excellent damping capacity of magnesium alloys makes them suitable for electronics applications where vibration and noise reduction are important. AZ92A-T4 can be used in the construction of electronic enclosures, camera bodies, and portable device frames.
- Tooling and Fixtures: Magnesium AZ92A-T4 is employed in tooling and fixtures due to its good castability. It is used for producing molds, patterns, and jigs in industries like injection molding, die casting, and metal forming.
- Consumer Goods: The lightweight and aesthetic appeal of magnesium alloys make them desirable for consumer goods. AZ92A-T4 may be used in the manufacturing of laptops, smartphones, handheld devices, and other consumer electronics.