Magnesium AZ31B-H24 (UNS M11311) Alloy

Topics Covered

Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Other Designations


Magnesium AZ31B-H24 alloy is available in the form of hard rolled sheets and is a medium strength alloy. This datasheet will elaborate on the properties and applications of this alloy.

Chemical Composition

The following table provides the chemical composition of magnesium AZ31B-H24 alloy.

Element Content (%)
Magnesium, Mg 97
Aluminum, Al 2.5-3.5
Zinc, Zn 0.60-1.4
Manganese, Mn ≥0.20
Silicon, Si ≤0.10
Copper, Cu ≤0.050
Calcium, Ca ≤0.040
Iron, Fe ≤0.0050
Nickel, Ni ≤0.0050

Physical Properties

The physical properties of magnesium AZ31B-H24 alloy are given in the following table.

Properties Metric Imperial
Density 1.77 g/cc 0.0639 lb/in³
Melting Point 605-630°C 1120-1170°F

Mechanical Properties

The mechanical properties of magnesium AZ31B-H24 alloy are listed in the table below.

Properties Metric Imperial
Tensile Strength 290 MPa 42100 psi
Yield strength (@strain 0.200%) 220 MPa 31900 psi
Compressive Yield Strength (at 0.2% offset) 180 MPa 26100 psi
Ultimate Bearing Strength 495 MPa 71800 psi
Bearing Yield Strength 325 MPa 47100 psi
Elongation at break (in 50 mm) 15 % 15 %
Elastic Modulus (in tension) 45 GPa 6530 ksi
Poisson's ratio 0.35 0.35
Shear Modulus 17 GPa 2470 ksi
Shear Strength 160 MPa 23200 psi
Machinability (relative rating, 100=Best) 100 100
Hardness, Brinell (500 kg load, 10 mm ball) 73 73
Hardness, Knoop (estimated from Brinell) 96 96

Thermal Properties

The following table outlines the thermal properties of magnesium AZ31B-H24 alloy.

Properties Metric Imperial
Thermal expansion co-efficient (@ 0.000-100°C/32-212°F) 26 µm/m°C 14.4 µin/in°F
Thermal Conductivity 96 W/mK 666 BTU in/hr.ft².°F

Other Designations

Some of the other designations that are used to denote magnesium AZ31B-H24 alloy are:-

  • UNS M11210


Magnesium AZ31B-H24 alloy is used in aircraft fuselage, cell phones and camera cases, textile machinery and concrete tools.

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