Magnesium AZ91A-F (UNS M11910)
Magnesium AZ91A-F is a widely used die-casting alloy known for its high strength-to-weight ratio, excellent corrosion resistance, and ease of casting. These properties make it suitable for demanding applications across automotive, aerospace, electronics, and industrial sectors.
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| Chemical Composition | ||
|---|---|---|
| Element | Min | Max |
| Magnesium | —— | Remainder |
| Aluminum | 8.3% | 9.7% |
| Copper | —— | 0.1% |
| Manganese | 0.13% | —— |
| Nickel | —— | 0.03% |
| Silicon | —— | 0.5% |
| Zinc | 0.35% | 1.0% |
The following table provides a list of magnesium AZ91A-F 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) | 230 MPa |
| Tensile Strength (Yield) | 150 MPa |
| Compressive Strength (Yield) | 165 MPa |
| Fatigue Strength # of Cycles 5.0e+8 | 97 MPa |
| Shear Strength | 140 MPa |
| Young’s Modulus (E) | 44.8 GPa |
| Shear Modulus (G) | 17 GPa |
| Elongation at Break in 50 mm | 3% |
| 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 | 71 |
| Machinability | 100% |
| Charpy Impact V-notch | 2.70 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 |
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 AZ91A-F
| Advantages | Disadvantages |
|---|---|
| Lightweight | Corrosion susceptibility |
| Good strength-to-weight ratio | Limited strength compared to other metals |
| Good castability | Higher cost |
| Improved high-temperature performance | Fire hazard |
Applications of Magnesium AZ91A-F
Magnesium AZ91A-F is used in a variety of applications where its specific combination of properties is advantageous. Key applications include:
- Automotive industry: Widely employed due to its lightweight nature, helping reduce the overall weight of vehicles.
- Aerospace industry: Used in aircraft components, including interior parts, seat frames, brackets, and other structural elements where weight reduction is critical.
- Electronic devices: Utilized for its excellent electromagnetic shielding capabilities in laptop casings, tablets, smartphones, and other consumer electronic devices.
- Sporting goods: Suitable for golf club heads, bicycle frames, and lightweight camping gear due to its lightweight and high-strength characteristics.
- Power tools and equipment: Used where lightweight construction improves handling and maneuverability.
- Industrial applications: Applied in machinery components, die-cast parts, and equipment housings.