# ZE63A (ZE63A-T6, M16630) Magnesium

ZE63A magnesium is a magnesium alloy. Cited properties are appropriate for the T6 temper. To achieve this temper, the metal is solution heat-treated and artificially aged until it meets standard mechanical property requirements. ZE63A is the ASTM designation for this material. M16630 is the UNS number.

It has the lowest melting temperature among magnesium alloys. In addition, it has a very high density and a very high electrical conductivity.

The graph bars on the material properties cards below compare ZE63A 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

Brinell Hardness

73

Compressive (Crushing) Strength

450 *MPa* 65 *x 10 ^{3} psi*

Elastic (Young's, Tensile) Modulus

46 *GPa* 6.6 *x 10 ^{6} psi*

Elongation at Break

7.7 *%*

Fatigue Strength

120 *MPa* 17 *x 10 ^{3} psi*

Fracture Toughness

27 *MPa-m ^{1/2}* 25

*x 10*

^{3}psi-in^{1/2}Poisson's Ratio

0.29

Shear Modulus

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

Shear Strength

170 *MPa* 25 *x 10 ^{3} psi*

Tensile Strength: Ultimate (UTS)

300 *MPa* 43 *x 10 ^{3} psi*

Tensile Strength: Yield (Proof)

190 *MPa* 28 *x 10 ^{3} psi*

## Thermal Properties

Latent Heat of Fusion

330 *J/g*

Maximum Temperature: Mechanical

170 *°C* 330 *°F*

Melting Completion (Liquidus)

510 *°C* 950 *°F*

Melting Onset (Solidus)

390 *°C* 730 *°F*

Solidification (Pattern Maker's) Shrinkage

1.6 *%*

Specific Heat Capacity

950 *J/kg-K* 0.23 *BTU/lb-°F*

Thermal Conductivity

110 *W/m-K* 64 *BTU/h-ft-°F*

Thermal Expansion

27 *µm/m-K*

## Electrical Properties

Electrical Conductivity: Equal Volume

31 *% IACS*

Electrical Conductivity: Equal Weight (Specific)

140 *% IACS*

## Otherwise Unclassified Properties

Base Metal Price

22 *% relative*

Density

2.0 *g/cm ^{3}* 130

*lb/ft*

^{3}Embodied Carbon

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

Embodied Energy

180 *MJ/kg* 79 *x 10 ^{3} BTU/lb*

Embodied Water

920 *L/kg* 110 *gal/lb*

## Common Calculations

Resilience: Ultimate (Unit Rupture Work)

20 *MJ/m ^{3}*

Resilience: Unit (Modulus of Resilience)

400 *kJ/m ^{3}*

Stiffness to Weight: Axial

12 *points*

Stiffness to Weight: Bending

58 *points*

Strength to Weight: Axial

40 *points*

Strength to Weight: Bending

48 *points*

Thermal Diffusivity

57 *mm ^{2}/s*

Thermal Shock Resistance

17 *points*

## Alloy Composition

Mg | 89.6 to 92 | |

Zn | 5.5 to 6.0 | |

Zr | 0.4 to 1.0 | |

Cu | 0 to 0.1 | |

Ni | 0 to 0.010 | |

rare e. | 2.1 to 3.0 | |

res. | 0 to 0.3 |

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

## Followup Questions

## Similar Alloys

## Further Reading

Magnesium Alloys Containing Rare Earth Metals: Structure and Properties, L.L. Rokhlin, 2003

ASTM B80: Standard Specification for Magnesium-Alloy Sand Castings

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.

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