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ISO-WD21150 (MgAl3Zn1(A)) Magnesium

ISO-WD21150 magnesium is a magnesium alloy. WD21150 is the ISO numeric designation for this material. Additionally, the ASTM designation is AZ31A. And the UNS number is M11310.

The properties of ISO-WD21150 magnesium include four 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 ISO-WD21150 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

45 GPa 6.5 x 106 psi

Elongation at Break

5.7 to 11 %

Poisson's Ratio

0.29

Shear Modulus

17 GPa 2.5 x 106 psi

Shear Strength

150 to 170 MPa 21 to 24 x 103 psi

Tensile Strength: Ultimate (UTS)

240 to 290 MPa 35 to 42 x 103 psi

Tensile Strength: Yield (Proof)

120 to 200 MPa 17 to 30 x 103 psi

Thermal Properties

Latent Heat of Fusion

350 J/g

Maximum Temperature: Mechanical

110 °C 230 °F

Melting Completion (Liquidus)

600 °C 1110 °F

Melting Onset (Solidus)

550 °C 1020 °F

Specific Heat Capacity

990 J/kg-K 0.24 BTU/lb-°F

Thermal Conductivity

100 W/m-K 58 BTU/h-ft-°F

Thermal Expansion

27 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

19 % IACS

Electrical Conductivity: Equal Weight (Specific)

100 % IACS

Otherwise Unclassified Properties

Base Metal Price

12 % relative

Density

1.7 g/cm3 100 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)

15 to 24 MJ/m3

Resilience: Unit (Modulus of Resilience)

160 to 460 kJ/m3

Stiffness to Weight: Axial

15 points

Stiffness to Weight: Bending

70 points

Strength to Weight: Axial

40 to 48 points

Strength to Weight: Bending

52 to 58 points

Thermal Diffusivity

60 mm2/s

Thermal Shock Resistance

15 to 17 points

Alloy Composition

Magnesium (Mg) 94 to 97
Aluminum (Al) 2.4 to 3.6
Zinc (Zn) 0.5 to 1.5
Manganese (Mn) 0.15 to 0.4
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

ISO 3116: Magnesium and magnesium alloys - Wrought magnesium alloys

ASTM B80: Standard Specification for Magnesium-Alloy Sand Castings