MakeItFrom.com
Menu (ESC)

AZ91E-T4 Magnesium

AZ91E-T4 magnesium is AZ91E magnesium in the T4 temper. To achieve this temper, the metal is solution heat-treated and naturally aged. It has the highest ductility compared to the other variants of AZ91E magnesium. The graph bars on the material properties cards below compare AZ91E-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

Brinell Hardness

75

Compressive (Crushing) Strength

310 MPa 45 x 103 psi

Elastic (Young's, Tensile) Modulus

46 GPa 6.7 x 106 psi

Elongation at Break

6.2 %

Fatigue Strength

85 MPa 12 x 103 psi

Fracture Toughness

13 MPa-m1/2 12 x 103 psi-in1/2

Impact Strength: V-Notched Charpy

2.8 J 2.0 ft-lb

Poisson's Ratio

0.29

Shear Modulus

18 GPa 2.6 x 106 psi

Shear Strength

140 MPa 21 x 103 psi

Tensile Strength: Ultimate (UTS)

250 MPa 36 x 103 psi

Tensile Strength: Yield (Proof)

98 MPa 14 x 103 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

10 % IACS

Electrical Conductivity: Equal Weight (Specific)

52 % IACS

Otherwise Unclassified Properties

Base Metal Price

12 % relative

Density

1.7 g/cm3 110 lb/ft3

Embodied Carbon

22 kg CO2/kg material

Embodied Energy

160 MJ/kg 67 x 103 BTU/lb

Embodied Water

990 L/kg 120 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

12 MJ/m3

Resilience: Unit (Modulus of Resilience)

110 kJ/m3

Stiffness to Weight: Axial

15 points

Stiffness to Weight: Bending

69 points

Strength to Weight: Axial

40 points

Strength to Weight: Bending

51 points

Thermal Diffusivity

49 mm2/s

Thermal Shock Resistance

14 points

Alloy Composition

Magnesium (Mg) 88.8 to 91.3
Aluminum (Al) 8.1 to 9.3
Zinc (Zn) 0.4 to 1.0
Manganese (Mn) 0.17 to 0.35
Silicon (Si) 0 to 0.2
Copper (Cu) 0 to 0.015
Iron (Fe) 0 to 0.0050
Nickel (Ni) 0 to 0.0010
Residuals 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