AZ91E (M11919) Magnesium

AZ91E magnesium is a magnesium alloy. AZ91E is the ASTM designation for this material. M11919 is the UNS number.

The properties of AZ91E magnesium include three common variations. This page shows summary ranges across all of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare AZ91E 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.

AZ91E-F Magnesium AZ91E-T4 Magnesium

AZ91E-T6 Magnesium

Mechanical Properties

Brinell Hardness

Compressive (Crushing) Strength

310 to 410 MPa 45 to 60 x 10³ psi

Elastic (Young's, Tensile) Modulus

46 GPa 6.7 x 10⁶ psi

Elongation at Break

2.5 to 6.2 %

Fatigue Strength

81 to 85 MPa 12 x 10³ psi

Fracture Toughness

13 MPa-m^1/2 12 x 10³ psi-in^1/2

Impact Strength: V-Notched Charpy

0.79 to 2.8 J 0.58 to 2.0 ft-lb

Poisson's Ratio

0.29

Shear Modulus

18 GPa 2.6 x 10⁶ psi

Shear Strength

89 to 150 MPa 13 to 21 x 10³ psi

Tensile Strength: Ultimate (UTS)

160 to 260 MPa 23 to 38 x 10³ psi

Tensile Strength: Yield (Proof)

96 to 130 MPa 14 to 19 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 to 12 % IACS

Electrical Conductivity: Equal Weight (Specific)

52 to 60 % 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)

3.4 to 12 MJ/m³

Resilience: Unit (Modulus of Resilience)

100 to 190 kJ/m³

Stiffness to Weight: Axial

15 points

Stiffness to Weight: Bending

69 points

Strength to Weight: Axial

25 to 42 points

Strength to Weight: Bending

37 to 53 points

Thermal Diffusivity

49 mm²/s

Thermal Shock Resistance

9.0 to 15 points

Alloy Composition

Magnesium (Mg)Mg		88.8 to 91.3
Aluminum (Al)Al		8.1 to 9.3
Zinc (Zn)Zn		0.4 to 1.0
Manganese (Mn)Mn		0.17 to 0.35
Silicon (Si)Si		0 to 0.2
Copper (Cu)Cu		0 to 0.015
Iron (Fe)Fe		0 to 0.0050
Nickel (Ni)Ni		0 to 0.0010
Residualsres.		0 to 0.3