Magnesium HM21A-F (UNS M13210)

Image of Magnesium HM21A-F bars
Credit: CSIRO, CC BY 3.0, via Wikimedia Commons

HM21A-F is a magnesium alloy that is used in a variety of applications, including aerospace, automotive, and industrial. It is known for its high strength, toughness, and corrosion resistance.

Chemical Composition
ElementMinMax
MagnesiumRemainder
Manganese0.45%1.1%
Thorium1.5%2.5%

The following table provides a list of magnesium HM21A-F properties in both SI and US customary/Imperial units.

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

Table of Magnesium HM21A-F Properties
Physical Properties
Metric
Density1780 kg/m3
Mechanical PropertiesMetric
Tensile Strength (Ultimate)230 MPa
Tensile Strength (Yield)140 MPa
Compressive Strength (Yield)115 MPa
Young’s Modulus (E)45 GPa
Shear Modulus (G)17 GPa
Elongation at Break in 50 mm15%
Poisson’s Ratio (ν)0.35
Thermal PropertiesMetric
Melting Point605 - 650 °C
Solidus605 °C
Liquidus650 °C
Specific Heat Capacity (Cp)1000 J/kg·K
Coefficient of Thermal Expansion (αL)26.8 1/°C
Heat of Fusion343 J/g
Electrical PropertiesMetric
Electrical Resistivity5.00×10-6 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 HM21A-F

AdvantagesDisadvantages
High strengthFlammable
Corrosion resistanceExpensive
LightweightDifficult to machine

Applications of Magnesium HM21A-F

Magnesium HM21A-F is a versatile and reliable alloy that is used in a variety of applications, including:

  • Aerospace industry: Magnesium HM21A-F is used to make aircraft parts, such as engine blocks, pistons, and wheels.
  • Automotive industry: Magnesium HM21A-F is used to make engine blocks, pistons, wheels, and brake rotors.
  • Industrial sector: Magnesium HM21A-F is used to make machinery, tools, dies, and molds.
  • Medical industry: Magnesium HM21A-F is used to make implants, prosthetics, and surgical instruments.
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