Magnesium AZ91E-T6 (UNS M11919)

Image of Magnesium AZ91E-T6 bars
Credit: CSIRO, CC BY 3.0, via Wikimedia Commons

AZ91E-T6 is a high-purity magnesium alloy commonly used in pressure-tight sand and permanent mold castings. It has excellent corrosion resistance and is known for its high tensile strength and moderate yield strength.

Chemical Composition
ElementMinMax
Magnesium88.51%91.22%
Aluminum8.1%9.3%
Copper0.015%
Iron0.005%
Manganese0.17%0.35%
Nickel0.001%
Silicon0.20%
Zinc0.40%1.0%
Other0.30%

The following table provides a list of magnesium AZ91E-T6 properties in both SI and US customary/Imperial units.

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

Table of Magnesium AZ91E-T6 Properties
Physical Properties
Metric
Density1810 kg/m3
Mechanical PropertiesMetric
Tensile Strength (Ultimate)275 MPa
Tensile Strength (Yield)145 MPa
Compressive Strength (Yield)130 MPa
Bearing Strength (Ultimate)515 MPa
Bearing Strength (Yield)360 MPa
Fatigue Strength # of Cycles 5.0e+885 MPa
Young’s Modulus (E)44.8 GPa
Shear Modulus (G)17 GPa
Elongation at Break in 50 mm6%
Poisson’s Ratio (ν)0.35
Brinell Hardness 500 kg load, 10 mm ball70
Knoop Hardness Converted from Brinell93
Rockwell Hardness77
Vickers Hardness Converted from Brinell80
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 AZ91E-T6

AdvantagesDisadvantages
High strength-to-weight ratioSusceptible to corrosion without proper treatment
LightweightCan be challenging to machine
Good castabilityHigher cost compared to some other materials
Excellent damping capacityLimited availability and processing options
Good thermal and electrical conductivityLimited weldability
Recyclable and environmentally friendlyLower modulus of elasticity compared to some metals
Good dimensional stability and rigidityLimited use in high-temperature applications

Applications of Magnesium AZ91E-T6

Magnesium AZ91E-T6, with its combination of strength, lightweight properties, and improved performance through heat treatment, finds applications in various industries. Some common applications of Magnesium AZ91E-T6 include:

  • Automotive Components: Magnesium AZ91E-T6 is used in the automotive industry for various components such as engine blocks, transmission cases, intake manifolds, steering columns, and structural parts.
  • Aerospace Industry: Magnesium AZ91E-T6 is utilized in aerospace applications where weight reduction is critical. It can be found in aircraft components like brackets, housings, and interior parts.
  • Electronic Devices: The lightweight and good electrical conductivity properties of Magnesium AZ91E-T6 make it suitable for electronic devices. It can be used in the casings of laptops, tablets, and mobile phones, providing a lightweight and durable housing while maintaining electromagnetic shielding.
  • Consumer Goods: Magnesium AZ91E-T6 is employed in the manufacturing of consumer goods such as sporting equipment, power tools, and camera bodies. Its lightweight characteristic enables the creation of lightweight and portable products.
  • Industrial Machinery: Magnesium AZ91E-T6 can be used in industrial machinery, particularly in applications that require components with high strength and rigidity. It finds applications in machine frames, equipment housings, and structural parts.
  • Medical Equipment: Due to its lightweight nature, Magnesium AZ91E-T6 is used in the production of medical equipment such as surgical instruments, braces, and lightweight wheelchairs.
  • Renewable Energy: Magnesium AZ91E-T6 is utilized in renewable energy systems, including wind turbines and solar panel frames, to take advantage of its lightweight properties and good corrosion resistance.
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