# ZK61A-T5 Magnesium

ZK61A-T5 magnesium is ZK61A magnesium in the T5 temper. To achieve this temper, the metal is artificially aged until it meets standard mechanical property requirements. The graph bars on the material properties cards below compare ZK61A-T5 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

5.8 *%*

Fatigue Strength

140 *MPa* 20 *x 10 ^{3} psi*

Poisson's Ratio

0.29

Shear Modulus

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

Shear Strength

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

Tensile Strength: Ultimate (UTS)

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

Tensile Strength: Yield (Proof)

180 *MPa* 27 *x 10 ^{3} psi*

## Thermal Properties

Latent Heat of Fusion

330 *J/g*

Maximum Temperature: Mechanical

120 *°C* 250 *°F*

Melting Completion (Liquidus)

640 *°C* 1180 *°F*

Melting Onset (Solidus)

530 *°C* 980 *°F*

Solidification (Pattern Maker's) Shrinkage

1.3 *%*

Specific Heat Capacity

960 *J/kg-K* 0.23 *BTU/lb-°F*

Thermal Conductivity

120 *W/m-K* 69 *BTU/h-ft-°F*

Thermal Expansion

27 *µm/m-K*

## Electrical Properties

Electrical Conductivity: Equal Volume

29 *% IACS*

Electrical Conductivity: Equal Weight (Specific)

130 *% IACS*

## Otherwise Unclassified Properties

Base Metal Price

13 *% relative*

Density

1.9 *g/cm ^{3}* 120

*lb/ft*

^{3}Embodied Carbon

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

Embodied Energy

160 *MJ/kg* 70 *x 10 ^{3} BTU/lb*

Embodied Water

940 *L/kg* 110 *gal/lb*

## Common Calculations

Resilience: Ultimate (Unit Rupture Work)

15 *MJ/m ^{3}*

Resilience: Unit (Modulus of Resilience)

370 *kJ/m ^{3}*

Stiffness to Weight: Axial

13 *points*

Stiffness to Weight: Bending

62 *points*

Strength to Weight: Axial

42 *points*

Strength to Weight: Bending

50 *points*

Thermal Diffusivity

65 *mm ^{2}/s*

Thermal Shock Resistance

17 *points*

## Alloy Composition

Mg | 92.1 to 93.9 | |

Zn | 5.5 to 6.5 | |

Zr | 0.6 to 1.0 | |

Cu | 0 to 0.1 | |

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

Advances in Wrought Magnesium Alloys: Fundamentals of Processing, Properties and Applications, Colleen Bettles and Matthew Barnett (editors), 2012

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

Environmental Degradation of Advanced and Traditional Engineering Materials, Lloyd H. Hihara et al., 2014.

Advanced Materials in Automotive Engineering, Jason Rowe (editor), 2012

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