Magnesium AZ92A-T7 (UNS M11920)

Image of Magnesium AZ92A-T7 bars
Credit: CSIRO, CC BY 3.0, via Wikimedia Commons

AZ92A-T7 is a magnesium alloy that is commonly used in sand and permanent-mold castings. It has high tensile strength and good yield strength, making it suitable for applications where strength and lightweight are important.

Chemical Composition
ElementMinMax
MagnesiumRemainder
Aluminum8.3%9.7%
Copper0.25%
Manganese0.10%
Nickel0.01%
Silicon0.30%
Zinc1.6%2.4%

The following table provides a list of magnesium AZ92A-T7 properties in both SI and US customary/Imperial units.

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

Table of Magnesium AZ92A-T7 Properties
Physical Properties
Metric
Density1830 kg/m3
Mechanical PropertiesMetric
Tensile Strength (Ultimate)275 MPa
Tensile Strength (Yield)145 MPa
Fatigue Strength # of Cycles 5.0e+890 MPa
Shear Strength150 MPa
Young’s Modulus (E)45 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 ball78
Knoop Hardness Converted from Brinell101
Rockwell Hardness86
Vickers Hardness Converted from Brinell88
Machinability100%
Thermal PropertiesMetric
Melting Point Incipient Melting≥ 410 °C
Solidus445 °C
Liquidus595 °C
Thermal Conductivity (T6 Temper)58.3 W/m·K
Specific Heat Capacity (Cp)1050 J/kg·K
Coefficient of Thermal Expansion (αL)26.0 1/°C
Heat of Fusion373 J/g
Electrical PropertiesMetric
Electrical Resistivity (T6 Temper)1.24×10-5 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-T7

AdvantagesDisadvantages
High strengthCorrosion-prone
Good machinabilityLow melting point
LightweightHigh cost

Applications of Magnesium AZ92A-T7

Magnesium AZ92A-T7 is a versatile alloy with a wide range of applications. Some applications of Magnesium AZ92A-T7 include:

  • Automotive: Engine blocks, transmission housings, suspension components, brake rotors, wheels
  • Aerospace: Aircraft bodies, engine parts, rocket casings, satellite bodies
  • Construction: Building frames, roofing panels, windows and doors, staircases
  • Marine: Boat hulls, propellers, rudders, lifeboats
  • Electronics: Laptop frames, cellphone cases, computer monitors, televisions
  • Other: Bicycle frames, golf clubs, musical instruments, sporting goods, medical devices
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