# AZ91E-F Magnesium

AZ91E-F magnesium is AZ91E magnesium in the as-fabricated (no temper or treatment) condition. It has the lowest strength and lowest ductility compared to the other variants of AZ91E magnesium. The graph bars on the material properties cards below compare AZ91E-F 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

75

Compressive (Crushing) Strength

310 *MPa* 45 *x 10 ^{3} psi*

Elastic (Young's, Tensile) Modulus

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

Elongation at Break

2.5 *%*

Fatigue Strength

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

Fracture Toughness

13 *MPa-m ^{1/2}* 12

*x 10*

^{3}psi-in^{1/2}Impact Strength: V-Notched Charpy

0.79 *J* 0.58 *ft-lb*

Poisson's Ratio

0.29

Shear Modulus

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

Shear Strength

89 *MPa* 13 *x 10 ^{3} psi*

Tensile Strength: Ultimate (UTS)

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

Tensile Strength: Yield (Proof)

96 *MPa* 14 *x 10 ^{3} psi*

## Thermal Properties

Latent Heat of Fusion

350 *J/g*

Maximum Temperature: Mechanical

130 *°C* 270 *°F*

Melting Completion (Liquidus)

600 *°C* 1100 *°F*

Melting Onset (Solidus)

500 *°C* 930 *°F*

Solidification (Pattern Maker's) Shrinkage

1.3 *%*

Specific Heat Capacity

990 *J/kg-K* 0.24 *BTU/lb-°F*

Thermal Conductivity

84 *W/m-K* 49 *BTU/h-ft-°F*

Thermal Expansion

27 *µm/m-K*

## Electrical Properties

Electrical Conductivity: Equal Volume

12 *% IACS*

Electrical Conductivity: Equal Weight (Specific)

60 *% IACS*

## Otherwise Unclassified Properties

Base Metal Price

12 *% relative*

Density

1.7 *g/cm ^{3}* 110

*lb/ft*

^{3}Embodied Carbon

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

Embodied Energy

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

Embodied Water

990 *L/kg* 120 *gal/lb*

## Common Calculations

Resilience: Ultimate (Unit Rupture Work)

3.4 *MJ/m ^{3}*

Resilience: Unit (Modulus of Resilience)

100 *kJ/m ^{3}*

Stiffness to Weight: Axial

15 *points*

Stiffness to Weight: Bending

69 *points*

Strength to Weight: Axial

25 *points*

Strength to Weight: Bending

37 *points*

Thermal Diffusivity

49 *mm ^{2}/s*

Thermal Shock Resistance

9.0 *points*

## Alloy Composition

Mg | 88.8 to 91.3 | |

Al | 8.1 to 9.3 | |

Zn | 0.4 to 1.0 | |

Mn | 0.17 to 0.35 | |

Si | 0 to 0.2 | |

Cu | 0 to 0.015 | |

Fe | 0 to 0.0050 | |

Ni | 0 to 0.0010 | |

res. | 0 to 0.3 |

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

## Followup Questions

## Further Reading

ASTM B80: Standard Specification for Magnesium-Alloy Sand Castings

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