Magnesium HM31A-T5 (UNS M13312)

Image of Magnesium HM31A-T5 bars
Credit: CSIRO, CC BY 3.0, via Wikimedia Commons

HM31A-T5 is a magnesium alloy that exhibits improved short and long-time creep properties and good ductility even at elevated temperatures. It is used in a variety of applications, including aerospace, automotive, and industrial.

Chemical Composition
ElementMinMax
MagnesiumRemainder
Manganese1.2%
Thorium2.5%3.5%

The following table provides a list of magnesium HM31A-T5 properties in both SI and US customary/Imperial units.

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

Table of Magnesium HM31A-T5 Properties
Physical Properties
Metric
Density1800 kg/m3
Mechanical PropertiesMetric
Tensile Strength (Ultimate)300 MPa
Tensile Strength (Yield)270 MPa
Compressive Strength (Yield)170 MPa
Bearing Strength (Ultimate)470 MPa
Bearing Strength (Yield)330 MPa
Shear Strength185 MPa
Young’s Modulus (E)45 GPa
Shear Modulus (G)17 GPa
Elongation at Break in 50 mm10%
Poisson’s Ratio (ν)0.35
Thermal PropertiesMetric
Melting Point Incipient Melting≥ 482 °C
Solidus605 °C
Liquidus650 °C
Thermal Conductivity104 W/m·K
Specific Heat Capacity (Cp)1000 J/kg·K
Coefficient of Thermal Expansion (αL)26.0 1/°C
Heat of Fusion331 J/g
Electrical PropertiesMetric
Electrical Resistivity5.70×10-6 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 HM31A-T5

AdvantagesDisadvantages
LightweightCorrosion-prone
High strengthLow melting point
Good thermal conductivityHigh cost
Good machinabilityDifficult to weld

Applications of Magnesium HM31A-T5

Magnesium HM31A-T5 is a high-performance magnesium alloy that is used in a variety of applications, including:

  • Aircraft and aerospace structures: Magnesium HM31A-T5 is used in a variety of aircraft and aerospace structures, such as landing gear, wing spars, and fuselage panels.
  • High-performance machinery: Magnesium HM31A-T5 is used in a variety of high-performance machinery, such as engine blocks, transmission cases, and gear boxes.
  • Marine applications: Magnesium HM31A-T5 is used in a variety of marine applications, such as boat hulls, propellers, and rudders.
  • Automotive parts: Magnesium HM31A-T5 is used in a variety of automotive parts, such as engine blocks, transmission cases, and suspension components.
  • Medical devices: Magnesium HM31A-T5 is used in a variety of medical devices, such as prosthetic limbs, surgical implants, and medical instruments.
  • Sporting goods: Magnesium HM31A-T5 is used in a variety of sporting goods, such as bicycles, golf clubs, and fishing rods.
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