# AZ63A-T4 Magnesium

AZ63A-T4 magnesium is AZ63A magnesium in the T4 temper. To achieve this temper, the metal is solution heat-treated and naturally aged. It has the highest strength and highest ductility compared to the other variants of AZ63A magnesium.

The graph bars on the material properties cards below compare AZ63A-T4 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

46 *GPa* 6.7 *x 10 ^{6} psi*

Elongation at Break

8.0 *%*

Fatigue Strength

83 *MPa* 12 *x 10 ^{3} psi*

Poisson's Ratio

0.29

Shear Modulus

18 *GPa* 2.6 *x 10 ^{6} psi*

Shear Strength

160 *MPa* 23 *x 10 ^{3} psi*

Tensile Strength: Ultimate (UTS)

270 *MPa* 39 *x 10 ^{3} psi*

Tensile Strength: Yield (Proof)

85 *MPa* 12 *x 10 ^{3} psi*

## Thermal Properties

Latent Heat of Fusion

350 *J/g*

Maximum Temperature: Mechanical

120 *°C* 250 *°F*

Melting Completion (Liquidus)

610 *°C* 1130 *°F*

Melting Onset (Solidus)

450 *°C* 850 *°F*

Solidification (Pattern Maker's) Shrinkage

1.3 *%*

Specific Heat Capacity

980 *J/kg-K* 0.23 *BTU/lb-°F*

Thermal Conductivity

52 *W/m-K* 30 *BTU/h-ft-°F*

Thermal Expansion

26 *µm/m-K*

## Electrical Properties

Electrical Conductivity: Equal Volume

12 *% IACS*

Electrical Conductivity: Equal Weight (Specific)

61 *% IACS*

## Otherwise Unclassified Properties

Base Metal Price

12 *% relative*

Density

1.8 *g/cm ^{3}* 110

*lb/ft*

^{3}Embodied Carbon

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

Embodied Energy

150 *MJ/kg* 66 *x 10 ^{3} BTU/lb*

Embodied Water

970 *L/kg* 120 *gal/lb*

## Common Calculations

Resilience: Ultimate (Unit Rupture Work)

16 *MJ/m ^{3}*

Resilience: Unit (Modulus of Resilience)

78 *kJ/m ^{3}*

Stiffness to Weight: Axial

14 *points*

Stiffness to Weight: Bending

66 *points*

Strength to Weight: Axial

41 *points*

Strength to Weight: Bending

51 *points*

Thermal Diffusivity

29 *mm ^{2}/s*

Thermal Shock Resistance

16 *points*

## Alloy Composition

Mg | 88.6 to 92.1 | |

Al | 5.3 to 6.7 | |

Zn | 2.5 to 3.5 | |

Mn | 0.15 to 0.35 | |

Si | 0 to 0.3 | |

Cu | 0 to 0.25 | |

Ni | 0 to 0.010 | |

res. | 0 to 0.3 |

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

## Followup Questions

## Further Reading

Welding and Joining of Magnesium Alloys, Liming Liu (editor), 2010

ASTM B80: Standard Specification for Magnesium-Alloy Sand Castings

Essential Readings in Magnesium Technology, Suveen N. Mathaudhu et al. (editors), 2014

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