AZ92A (M11920) Magnesium

AZ92A magnesium is an alloy of magnesium. AZ92A is the ASTM designation for this material. M11920 is the UNS number.

It has four common variants, each represented as a separate material. The Material Properties section below shows ranges encompassing all variants. For more specific values, follow the links in the Variant Materials section.

Material Properties

Base Metal Price20 % rel

Density2.0 g/cm3 (120 lb/ft3)

Elastic (Young's, Tensile) Modulus49 GPa (7.1 x 106 psi)

Melting Onset (Solidus)440 °C (820 °F)

Modulus of Resilience (Unit Resilience)74 to 200 kJ/m3

Poisson's Ratio0.29

Solidification (Pattern Maker's) Shrinkage1.3 %

Specific Heat Capacity980 J/kg-K

Strength to Weight Ratio85 to 140 kN-m/kg

Tensile Strength: Ultimate (UTS)170 to 270 MPa (25 to 39 x 103 psi)

Tensile Strength: Yield (Proof)85 to 140 MPa (12 to 20 x 103 psi)

Thermal Expansion25 µm/m-K

The length of each bar compares the given value to the highest value in the database.

Alloy Composition

Magnesium (Mg)86.7 to 90 %

Aluminum (Al)8.3 to 9.7 %

Zinc (Zn)1.6 to 2.4 %

Manganese (Mn)0.1 to 0.35 %

Residuals0 to 0.3 %

Silicon (Si)0 to 0.3 %

Copper (Cu)0 to 0.25 %

Nickel (Ni)0 to 0.010 %

Further Reading

ASTM B199: Standard Specification for Magnesium-Alloy Permanent Mold Castings

ASTM B403: Standard Specification for Magnesium-Alloy Investment Castings

ASTM B80: Standard Specification for Magnesium-Alloy Sand Castings

Environmental Degradation of Advanced and Traditional Engineering Materials, Lloyd H. Hihara et al., 2014.