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
| Mg | 86.7 to 90 | |
| Al | 8.3 to 9.7 | |
| Zn | 1.6 to 2.4 | |
| Mn | 0.1 to 0.35 | |
| Si | 0 to 0.3 | |
| Cu | 0 to 0.25 | |
| Ni | 0 to 0.010 | |
| res. | 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