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AZ92A-T4 Magnesium

AZ92A-T4 magnesium is AZ92A magnesium in the T4 temper. To achieve this temper, the metal is solution heat-treated and naturally aged. It has the highest ductility compared to the other variants of AZ92A magnesium. The graph bars on the material properties cards below compare AZ92A-T4 magnesium to other magnesium alloys (top) and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.

Mechanical Properties

Elastic (Young's, Tensile) Modulus

47 GPa 6.8 x 106 psi

Elongation at Break

6.8 %

Fatigue Strength

90 MPa 13 x 103 psi

Poisson's Ratio

0.29

Shear Modulus

18 GPa 2.6 x 106 psi

Shear Strength

160 MPa 23 x 103 psi

Tensile Strength: Ultimate (UTS)

270 MPa 39 x 103 psi

Tensile Strength: Yield (Proof)

83 MPa 12 x 103 psi

Thermal Properties

Latent Heat of Fusion

350 J/g

Maximum Temperature: Mechanical

130 °C 270 °F

Melting Completion (Liquidus)

590 °C 1100 °F

Melting Onset (Solidus)

440 °C 830 °F

Solidification (Pattern Maker's) Shrinkage

1.3 %

Specific Heat Capacity

980 J/kg-K 0.23 BTU/lb-°F

Thermal Conductivity

44 W/m-K 26 BTU/h-ft-°F

Thermal Expansion

26 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

11 % IACS

Electrical Conductivity: Equal Weight (Specific)

53 % IACS

Otherwise Unclassified Properties

Base Metal Price

12 % relative

Density

1.8 g/cm3 110 lb/ft3

Embodied Carbon

22 kg CO2/kg material

Embodied Energy

160 MJ/kg 67 x 103 BTU/lb

Embodied Water

980 L/kg 120 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

14 MJ/m3

Resilience: Unit (Modulus of Resilience)

73 kJ/m3

Stiffness to Weight: Axial

14 points

Stiffness to Weight: Bending

67 points

Strength to Weight: Axial

41 points

Strength to Weight: Bending

51 points

Thermal Diffusivity

25 mm2/s

Thermal Shock Resistance

16 points

Alloy Composition

Magnesium (Mg)Mg 86.7 to 90
Aluminum (Al)Al 8.3 to 9.7
Zinc (Zn)Zn 1.6 to 2.4
Manganese (Mn)Mn 0.1 to 0.35
Silicon (Si)Si 0 to 0.3
Copper (Cu)Cu 0 to 0.25
Nickel (Ni)Ni 0 to 0.010
Residualsres. 0 to 0.3

All values are % weight. Ranges represent what is permitted under applicable standards.

Followup Questions

Further Reading

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

ASTM B403: Standard Specification for Magnesium-Alloy Investment Castings

Welding and Joining of Magnesium Alloys, Liming Liu (editor), 2010

ASTM B80: Standard Specification for Magnesium-Alloy Sand Castings

Essential Readings in Magnesium Technology, Suveen N. Mathaudhu et al. (editors), 2014