# 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 10 ^{6} psi*

Elongation at Break

5.7 *%*

Poisson's Ratio

0.29

Shear Modulus

17 *GPa* 2.5 *x 10 ^{6} psi*

Shear Strength

170 *MPa* 24 *x 10 ^{3} psi*

Tensile Strength: Ultimate (UTS)

290 *MPa* 42 *x 10 ^{3} psi*

Tensile Strength: Yield (Proof)

200 *MPa* 30 *x 10 ^{3} 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/cm ^{3}* 100

*lb/ft*

^{3}Embodied Carbon

23 *kg CO _{2}/kg material*

Embodied Energy

160 *MJ/kg* 67 *x 10 ^{3} BTU/lb*

Embodied Water

980 *L/kg* 120 *gal/lb*

## Common Calculations

Resilience: Ultimate (Unit Rupture Work)

15 *MJ/m ^{3}*

Resilience: Unit (Modulus of Resilience)

460 *kJ/m ^{3}*

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 *mm ^{2}/s*

Thermal Shock Resistance

17 *points*

## Alloy Composition

Mg | 94 to 97 | |

Al | 2.4 to 3.6 | |

Zn | 0.5 to 1.5 | |

Mn | 0.15 to 0.4 | |

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

## Further Reading

ISO 3116: Magnesium and magnesium alloys - Wrought magnesium alloys

ASTM B80: Standard Specification for Magnesium-Alloy Sand Castings