Menu (ESC)

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 relative to other magnesium alloys in the database.

The properties of AZ80A magnesium include three common variations. The property values on this page show 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).

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


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

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


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 m2/s

Thermal Shock Resistance

19 to 20 points

Alloy Composition

Magnesium (Mg) 89 to 91.9
Aluminum (Al) 7.8 to 9.2
Zinc (Zn) 0.2 to 0.8
Manganese (Mn) 0.12 to 0.5
Silicon (Si) 0 to 0.1
Copper (Cu) 0 to 0.050
Nickel (Ni) 0 to 0.0050
Iron (Fe) 0 to 0.0050
Residuals 0 to 0.3

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

Followup Questions

Similar Alloys

Further Reading

ASTM B91: Standard Specification for Magnesium-Alloy Forgings

Welding and Joining of Magnesium Alloys, Liming Liu ed., 2010

ISO 3116: Magnesium and magnesium alloys - Wrought magnesium alloys

Environmental Degradation of Advanced and Traditional Engineering Materials, Lloyd H. Hihara et al., 2014.

ASTM B107: Standard Specification for Magnesium-Alloy Extruded Bars, Rods, Profiles, Tubes, and Wire

Properties and Selection: Nonferrous Alloys and Special-Purpose Materials, ASM Handbook vol. 2, ASM International, 1993