Aluminum 5556 Alloy (UNS A95556)

Topics Covered

Chemical Composition
Physical Properties
Mechanical Properties
Other Designations


Aluminium / aluminum alloys 5000 series are known to possess excellent corrosion resistance, workability, strength, weldability, and toughness.

Aluminium / aluminum 5556 alloy is a wrought non-heat treatable alloy type. This alloy is a filler that has good ductility and enhanced crack resistance as it contains magnesium, manganese, and zinc. It is basically used on base metals 5154, 5254, 5454 and 5456.

When exposed to temperatures over 65°C (150°F), aluminium / aluminum 5556 alloy is affected by stress corrosion cracking; however this can be solved by using special alloys and tempers.

Chemical Composition

The following table shows the chemical composition of aluminium / aluminum 5556 alloy.

Element Content (%)
Aluminum, Al 91.9-94.7
Magnesium, Mg 4.7-5.5
Manganese, Mn 0.50-1
Iron, Fe ≤ 0.40
Zinc, Zn ≤ 0.25
Silicon, Si ≤ 0.25
Copper, Cu ≤ 0.10
Chromium, Cr 0.050-0.20
Titanium, Ti 0.050-0.20
Beryllium, Be ≤ 0.00080
Other, each ≤ 0.050
Other, total ≤ 0.15

Physical Properties

The physical properties of aluminium/aluminum 5556 alloy are outlined in the following table.

Properties Metric Imperial
Density 2.66 g/cm³ 0.0961 lb/in³
Melting point 568-635°C 1055-1175°F

Mechanical Properties

The mechanical properties of aluminium / aluminum 5556 alloy are tabulated below.

Properties Metric Imperial
Tensile strength 317 MPa 46 ksi
Yield strength 165 MPa 24 ksi
Elongation 22% 22%

Other Designations

Equivalent materials to aluminium / aluminum 5556 alloy are listed below:

  • BS N61
  • Alcan GB-B56S
  • AWCO-283


Aluminium / aluminum 5556 alloy is primarily used with 5154, 5254, 5454 and 5456 alloys. It is also used as welding filler wire.

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