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AZ61A (AZ61A-F, MgAl6Zn, M11610) Magnesium

AZ61A magnesium is a magnesium alloy. It is typically furnished in the as-fabricated (no temper or treatment) condition. AZ61A is the ASTM designation for this material. MgAl6Zn is the EN chemical designation. M11610 is the UNS number. Additionally, the ISO numeric designation is WD21160.

It has a fairly high ductility and a fairly high tensile strength relative to other magnesium alloys.

The graph bars on the material properties cards below compare AZ61A magnesium to other magnesium alloys (top) and the entire database (bottom).

Mechanical Properties

Compressive (Crushing) Strength

380 MPa 55 x 103 psi

Elastic (Young's, Tensile) Modulus

45 GPa 6.6 x 106 psi

Elongation at Break

11 %

Fatigue Strength

130 MPa 18 x 103 psi

Poisson's Ratio

0.29

Shear Modulus

17 GPa 2.5 x 106 psi

Shear Strength

150 MPa 21 x 103 psi

Tensile Strength: Ultimate (UTS)

280 MPa 41 x 103 psi

Tensile Strength: Yield (Proof)

170 MPa 24 x 103 psi

Thermal Properties

Melting Completion (Liquidus)

600 °C 1110 °F

Melting Onset (Solidus)

530 °C 980 °F

Specific Heat Capacity

990 J/kg-K 0.24 BTU/lb-°F

Thermal Conductivity

79 W/m-K 46 BTU/h-ft-°F

Thermal Expansion

27 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

12 % IACS

Electrical Conductivity: Equal Weight (Specific)

62 % 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 67 x 103 BTU/lb

Embodied Water

980 L/kg 120 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

27 MJ/m3

Resilience: Unit (Modulus of Resilience)

310 kJ/m3

Stiffness to Weight: Axial

15 points

Stiffness to Weight: Bending

69 points

Strength to Weight: Axial

46 points

Strength to Weight: Bending

56 points

Thermal Diffusivity

47 m2/s

Thermal Shock Resistance

17 points

Alloy Composition

Magnesium (Mg) 90.3 to 93.9
Aluminum (Al) 5.5 to 7.2
Zinc (Zn) 0.4 to 1.5
Manganese (Mn) 0.15 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 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.

CRC Materials Science and Engineering Handbook, 4th ed., James F. Shackelford et al. (editors), 2015