AZ63A-T4 Magnesium
AZ63A-T4 magnesium is AZ63A magnesium in the T4 temper. To achieve this temper, the metal is solution heat-treated and naturally aged. It has the highest strength and highest ductility compared to the other variants of AZ63A magnesium.
The graph bars on the material properties cards below compare AZ63A-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
46 GPa 6.7 x 106 psi
Elongation at Break
8.0 %
Fatigue Strength
83 MPa 12 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)
85 MPa 12 x 103 psi
Thermal Properties
Latent Heat of Fusion
350 J/g
Maximum Temperature: Mechanical
120 °C 250 °F
Melting Completion (Liquidus)
610 °C 1130 °F
Melting Onset (Solidus)
450 °C 850 °F
Solidification (Pattern Maker's) Shrinkage
1.3 %
Specific Heat Capacity
980 J/kg-K 0.23 BTU/lb-°F
Thermal Conductivity
52 W/m-K 30 BTU/h-ft-°F
Thermal Expansion
26 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
12 % IACS
Electrical Conductivity: Equal Weight (Specific)
61 % 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
150 MJ/kg 66 x 103 BTU/lb
Embodied Water
970 L/kg 120 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
16 MJ/m3
Resilience: Unit (Modulus of Resilience)
78 kJ/m3
Stiffness to Weight: Axial
14 points
Stiffness to Weight: Bending
66 points
Strength to Weight: Axial
41 points
Strength to Weight: Bending
51 points
Thermal Diffusivity
29 mm2/s
Thermal Shock Resistance
16 points
Alloy Composition
| Mg | 88.6 to 92.1 | |
| Al | 5.3 to 6.7 | |
| Zn | 2.5 to 3.5 | |
| Mn | 0.15 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
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
Properties and Selection: Nonferrous Alloys and Special-Purpose Materials, ASM Handbook vol. 2, ASM International, 1993