Editorial Feature

Magnesium AZ63A-T4 (UNS M11630) Alloy

Magnesium AZ63A-T4 is a sand cast alloy which exhibits good strength at room temperature. The ductility and toughness of this alloy are also considerably high. This datasheet will elaborate on the properties and applications of this alloy.

Chemical Composition

The following table provides the chemical composition of magnesium AZ63A-T4 alloy.

Element Content (%)
Magnesium, Mg 91
Aluminum, Al 5.3-6.7
Zinc, Zn 2.5-3.5
Silicon, Si ≤0.30
Copper, Cu ≤0.25
Manganese, Mn ≥0.15
Nickel, Ni ≤0.010

Physical Properties

The physical properties of magnesium AZ63A-T4 alloy are given in the following table.

Properties Metric Imperial
Density 1.83 g/cc 0.0661 lb/in³
Melting Point(Incipient melting) ≥360°C ≥680°F

Mechanical Properties

The mechanical properties of magnesium AZ63A-T4 alloy are listed in the table below.

Properties Metric Imperial
Tensile Strength 275 MPa 39900 psi
Yield strength (@strain 0.200%) 97 MPa 14100 psi
Compressive Yield Strength (at 0.2% offset) 97 MPa 14100 psi
Ultimate Bearing Strength 415 MPa 60200 psi
Bearing Yield Strength 415 MPa 60200 psi
Elongation at break (in 50 mm) 12% 12%
Elastic Modulus (in tension) 45 GPa 6530 ksi
Poisson's ratio 0.35 0.35
Shear Modulus 17 GPa 2470 ksi
Shear Strength 125 MPa 18100 psi
Machinability (relative rating, 100=Best) 100 100
Hardness, Brinell (500 kg load, 10 mm ball) 55 55
Hardness, Knoop (estimated from Brinell) 70 70
Hardness, Vickers (estimated from Brinell) 66 66
Hardness, Rockwell E 66 66

Thermal Properties

The following table outlines the thermal properties of magnesium AZ63A-T4 alloy.

Properties Metric Imperial
Thermal expansion co-efficient (@ 0.000-100°C/32-212°F) 26.1 µm/m°C 14.5 µin/in°F
Thermal Conductivity 52.2 W/mK 362 BTU in/hr.ft².°F

Other Designations

Some of the other designations that are used to denote magnesium AZ63A-T4 alloy are:-

  • UNS M11630
  • Elektron AZG
  • AMS 4420
  • AMS 4422
  • ASTM B 80


Magnesium AZ63A-T4 alloy is used in commercial and military structures that require medium strength and good ductility.

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