Magnesium AZ92A-T4 (UNS M11920)
AZ92A-T4 is a high-strength magnesium alloy widely utilized in sand and permanent mold castings. It offers excellent tensile and yield strength combined with good corrosion resistance, making it suitable for applications requiring lightweight yet durable materials in various industrial sectors.
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| Chemical Composition | ||
|---|---|---|
| Element | Min | Max |
| Magnesium | —— | Remainder |
| Aluminum | 8.3% | 9.7% |
| Copper | —— | 0.25% |
| Manganese | 0.1% | —— |
| Nickel | —— | 0.01% |
| Silicon | —— | 0.3% |
| 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 button 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
AZ92A-T4 serves a broad range of industries, delivering lightweight strength and excellent casting qualities for applications including:
- Aerospace: Used in aerospace applications where lightweight materials with high strength are essential.
- Automotive: Suitable for engine components, transmission cases, instrument panels, steering columns, and other parts requiring weight reduction.
- Sporting Goods: Employed in manufacturing bicycle frames, golf club heads, tennis racquets, and various sports equipment for its lightweight and strength.
- Industrial Equipment: Applied in machinery frames, robotic components, and fixtures, combining strength with reduced weight.
- Electronics: Ideal for electronic enclosures, camera bodies, and portable device frames due to excellent damping capacity for vibration and noise reduction.
- Tooling and Fixtures: Utilized in producing molds, patterns, and jigs for injection molding, die casting, and metal forming, thanks to good castability.
- Consumer Goods: Preferred for laptops, smartphones, handheld devices, and other consumer electronics owing to its lightweight and aesthetic appeal.