QE22A (QE22A-T6, 3.5106, M18220) Magnesium

QE22A magnesium is an alloy of magnesium. It is typically furnished in the T6 temper. QE22A is the ASTM designation for this material. 3.5106 is the EN numeric designation. And M18220 is the UNS number.

Material Properties

Brinell Hardness80

Compressive (Crushing) Strength350 MPa (51 x 103 psi)

Density2.1 g/cm3 (130 lb/ft3)

Elastic (Young's, Tensile) Modulus46 GPa (6.7 x 106 psi)

Electrical Conductivity25 % IACS

Electrical Resistivity Order of Magnitude-7 10x Ω-m

Elongation at Break2.3 %

Fatigue Strength (Endurance Limit)85 MPa (12 x 103 psi)

Melting Onset (Solidus)550 °C (1020 °F)

Modulus of Resilience (Unit Resilience)390 kJ/m3

Poisson's Ratio0.29

Solidification (Pattern Maker's) Shrinkage1.3 %

Specific Heat Capacity1000 J/kg-K

Strength to Weight Ratio120 kN-m/kg

Tensile Strength: Ultimate (UTS)260 MPa (38 x 103 psi)

Tensile Strength: Yield (Proof)190 MPa (28 x 103 psi)

Thermal Conductivity110 W/m-K

Thermal Diffusivity52 m2/s

Thermal Expansion27 µm/m-K

Unit Rupture Work (Ultimate Resilience)5.4 MJ/m3

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

Alloy Composition

Magnesium (Mg)93.1 to 95.8 %

Silver (Ag)2.0 to 3.0 %

Unspecified Rare Earths1.8 to 2.5 %

Zirconium (Zr)0.4 to 1.0 %

Residuals0 to 0.3 %

Copper (Cu)0 to 0.1 %

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.