Magnesium AZ91A-F (UNS M11910)

Image of Magnesium AZ91A-F bars
Credit: CSIRO, CC BY 3.0, via Wikimedia Commons

AZ91A-F is a high-purity magnesium alloy that is commonly used in die casting applications. It has good corrosion resistance and can be used in a variety of applications, including automotive parts, aerospace components, and electronic devices.

Chemical Composition
ElementMinMax
MagnesiumRemainder
Aluminum8.3%9.7%
Copper0.10%
Manganese0.13%
Nickel0.03%
Silicon0.50%
Zinc0.35%1.0%

The following table provides a list of magnesium AZ91A-F properties in both SI and US customary/Imperial units.

Click on the icon to switch between Metric and Imperial units.

Table of Magnesium AZ91A-F Properties
Physical Properties
Metric
Density1810 kg/m3
Mechanical PropertiesMetric
Tensile Strength (Ultimate)230 MPa
Tensile Strength (Yield)150 MPa
Compressive Strength (Yield)165 MPa
Fatigue Strength # of Cycles 5.0e+897 MPa
Shear Strength140 MPa
Young’s Modulus (E)44.8 GPa
Shear Modulus (G)17 GPa
Elongation at Break in 50 mm3%
Poisson’s Ratio (ν)0.35
Brinell Hardness 500 kg load, 10 mm ball63
Knoop Hardness Converted from Brinell84
Rockwell Hardness75
Vickers Hardness Converted from Brinell71
Machinability100%
Charpy Impact V-notch2.70 J
Thermal PropertiesMetric
Melting Point Incipient Melting≥ 421 °C
Solidus470 °C
Liquidus595 °C
Thermal Conductivity72.7 W/m·K
Specific Heat Capacity (Cp)1047 J/kg·K
Coefficient of Thermal Expansion (αL)26.0 1/°C
Heat of Fusion373 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

AdvantagesDisadvantages
LightweightCorrosion susceptibility
Good strength-to-weight ratioLimited strength compared to other metals
Good castabilityHigher cost
Improved high-temperature performanceFire hazard

Applications of Magnesium AZ91A-F

Magnesium AZ91A-F is used in a variety of applications where its specific combination of properties is advantageous. Here are some common applications of Magnesium AZ91A-F:

  • Automotive industry: Magnesium AZ91A-F is widely employed in the automotive industry due to its lightweight nature, which helps reduce the overall weight of vehicles.
  • Aerospace industry: The aerospace sector benefits from the lightweight properties of Magnesium AZ91A-F. It finds application in aircraft components, including interior parts, seat frames, brackets, and other structural elements where weight reduction is critical.
  • Electronic devices: Magnesium AZ91A-F is utilized in the manufacturing of electronic devices due to its excellent electromagnetic shielding capabilities. It can be found in laptop casings, tablets, smartphones, and other consumer electronic devices.
  • Sporting goods: The lightweight and high-strength characteristics of Magnesium AZ91A-F make it suitable for sporting goods, such as golf club heads, bicycle frames, and lightweight camping gear.
  • Power tools and equipment: Magnesium AZ91A-F is used in the production of power tools and equipment where lightweight construction is desired for improved handling and maneuverability.
  • Industrial applications: Magnesium AZ91A-F finds use in various industrial applications, including machinery components, die-cast parts, and equipment housings.
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