Magnesium AZ63A-T6 Alloy (UNS M11630)

Topics Covered

Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Other Designations


Magnesium alloys are used as advanced structural materials in applications, particularly automotive, aerospace, and railway industries due to their unique properties of low density, good machinability, excellent damping capacity, and high specific strength.

Magnesium AZ63A-T6 alloy has good room temperature strength, toughness, and ductility. The following sections will discuss in detail about magnesium AZ63A-T6 alloy.

Chemical Composition

The chemical composition of magnesium AZ63A-T6 alloy is outlined in the following table.

Element Content (%)
Aluminum, Al 6
Zinc, Zn 3
Manganese, Mn 0.15
Magnesium, Mg Remainder

Physical Properties

The physical properties of magnesium AZ63A-T6 alloy are tabulated below.

Properties Metric Imperial
Density 1.84 g/cm3 0.066 lb/in3

Mechanical Properties

The following table shows mechanical properties of magnesium AZ63A-T6 alloy.

Properties Metric Imperial
Tensile strength 275 MPa 40 ksi
Yield strength 130 MPa 18 ksi
Elastic modulus 44.8 GPa 6497 ksi
Elongation at break 5% 5%
Hardness 73 73
Machinability 100 100

Thermal Properties

The thermal properties of magnesium AZ63A-T6 alloy are tabulated below.

Properties Conditions
T (°C) Treatment
Thermal conductivity 75.3 W/mK - T6
Thermal expansion 26.1 x 10-6/°C 20-100 T6

Other Designations

Other designations that are equivalent to magnesium AZ63A-T6 alloy include the following:

  • ASTM A276
  • ASTM A580
  • AMS 4420
  • AMS 4422
  • AMS 4424
  • ASTM B 80
  • SAE J465


Magnesium AZ63A-T6 alloy is chiefly used in commercial and military structural applications.

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