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ISO-WD21150-H24 Magnesium

ISO-WD21150-H24 is ISO-WD21150 magnesium in the H24 temper. To achieve this temper, the metal is strain hardened, and then partially annealed, to a strength that is roughly halfway between annealed (O) and full-hard (H28).

It has the highest strength and lowest ductility compared to the other variants of ISO-WD21150 magnesium.

The graph bars on the material properties cards below compare ISO-WD21150-H24 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 %

Poisson's Ratio

0.29

Shear Modulus

17 GPa 2.5 x 106 psi

Shear Strength

170 MPa 24 x 103 psi

Tensile Strength: Ultimate (UTS)

290 MPa 42 x 103 psi

Tensile Strength: Yield (Proof)

200 MPa 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 MJ/m3

Resilience: Unit (Modulus of Resilience)

460 kJ/m3

Stiffness to Weight: Axial

15 points

Stiffness to Weight: Bending

70 points

Strength to Weight: Axial

48 points

Strength to Weight: Bending

58 points

Thermal Diffusivity

60 mm2/s

Thermal Shock Resistance

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

Further Reading

ISO 3116: Magnesium and magnesium alloys - Wrought magnesium alloys

ASTM B80: Standard Specification for Magnesium-Alloy Sand Castings