AZ80A (3.5812, M11800) Magnesium
AZ80A magnesium is a magnesium alloy. AZ80A is the ASTM designation for this material. M11800 is the UNS number. Additionally, the ISO numeric designation is WD21170.
It can have a fairly high tensile strength among magnesium alloys. In addition, it has a moderately low electrical conductivity and a moderately low melting temperature.
The properties of AZ80A magnesium include three common variations. This page shows summary ranges across all of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare AZ80A 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 6.6 x 106 psi
Elongation at Break
3.9 to 8.5 %
Fatigue Strength
140 to 170 MPa 20 to 25 x 103 psi
Poisson's Ratio
0.29
Shear Modulus
18 GPa 2.6 x 106 psi
Shear Strength
160 to 190 MPa 24 to 28 x 103 psi
Tensile Strength: Ultimate (UTS)
320 to 340 MPa 46 to 49 x 103 psi
Tensile Strength: Yield (Proof)
210 to 230 MPa 31 to 34 x 103 psi
Thermal Properties
Latent Heat of Fusion
350 J/g
Maximum Temperature: Mechanical
130 °C 270 °F
Melting Completion (Liquidus)
600 °C 1120 °F
Melting Onset (Solidus)
490 °C 920 °F
Specific Heat Capacity
990 J/kg-K 0.24 BTU/lb-°F
Thermal Conductivity
77 W/m-K 45 BTU/h-ft-°F
Thermal Expansion
26 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
11 % IACS
Electrical Conductivity: Equal Weight (Specific)
59 % IACS
Otherwise Unclassified Properties
Base Metal Price
12 % relative
Density
1.7 g/cm3 110 lb/ft3
Embodied Carbon
23 kg CO2/kg material
Embodied Energy
160 MJ/kg 68 x 103 BTU/lb
Embodied Water
990 L/kg 120 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
12 to 24 MJ/m3
Resilience: Unit (Modulus of Resilience)
500 to 600 kJ/m3
Stiffness to Weight: Axial
15 points
Stiffness to Weight: Bending
69 points
Strength to Weight: Axial
51 to 55 points
Strength to Weight: Bending
60 to 63 points
Thermal Diffusivity
45 mm2/s
Thermal Shock Resistance
19 to 20 points
Alloy Composition
| Mg | 89 to 91.9 | |
| Al | 7.8 to 9.2 | |
| Zn | 0.2 to 0.8 | |
| Mn | 0.12 to 0.5 | |
| Si | 0 to 0.1 | |
| Cu | 0 to 0.050 | |
| Ni | 0 to 0.0050 | |
| Fe | 0 to 0.0050 | |
| res. | 0 to 0.3 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Similar Alloys
Further Reading
ASTM B107: Standard Specification for Magnesium-Alloy Extruded Bars, Rods, Profiles, Tubes, and Wire
ASTM B91: Standard Specification for Magnesium-Alloy Forgings
ISO 3116: Magnesium and magnesium alloys - Wrought magnesium alloys
Welding and Joining of Magnesium Alloys, Liming Liu (editor), 2010
Essential Readings in Magnesium Technology, Suveen N. Mathaudhu et al. (editors), 2014
Environmental Degradation of Advanced and Traditional Engineering Materials, Lloyd H. Hihara et al., 2014.
Advanced Materials in Automotive Engineering, Jason Rowe (editor), 2012
Properties and Selection: Nonferrous Alloys and Special-Purpose Materials, ASM Handbook vol. 2, ASM International, 1993