Aluminium / Aluminum 5456 Alloy (UNS A95456)

Topics Covered

Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Other Designations
Fabrication and Heat Treatment
     Machinability
     Forming
     Welding
     Hot Working
     Cold Working
     Annealing
     Hardening
Applications

Introduction

Aluminum alloys have strong corrosion resistance. They are sensitive to high temperatures ranging between 200 and 250°C (392 and 482°F), and can lose some of their strength. However, the strength of the aluminum alloys can be increased at subzero temperatures, making them suitable low-temperature alloys.

Aluminium / Aluminum 5456 alloy has good strength and is useful for structural purposes because of its weldable characteristics. The following datasheet will provide more details about Aluminium / Aluminum 5456 alloy.

Chemical Composition

The following table shows the chemical composition of Aluminium / Aluminum 5456 alloy.

Element Content (%)
Aluminium / Aluminum, Al 93.9
Magnesium, Mg 5.1
Chromium, Cr 0.12
Manganese, Mn 0.8

Physical Properties

The physical properties of Aluminium / Aluminum 5456 alloy are outlined in the following table.

Properties Metric Imperial
Density 2.66 g/cm3 0.3489 lb/in³

Mechanical Properties

The mechanical properties of Aluminium / Aluminum 5456 alloy are tabulated below.

Properties Metric Imperial
Elastic modulus 70-80 Gpa 10152-11603 ksi
Poisson’s ratio 0.33 0.33

Thermal Properties

The thermal properties of Aluminium / Aluminum 5456 alloy are tabulated below.

Properties Conditions
T (ºC) Treatment
Thermal conductivity 116 W/mK 25 ALL
Thermal expansion 23.9 x 10-6/ºC 20-100 -

Other Designations

Equivalent materials to Aluminium / Aluminum 5456 alloy are as follows:

  • ASTM B209
  • ASTM B210
  • ASTM B221
  • ASTM B241
  • ASTM B548
  • MIL S-24149/2
  • QQ A-200/7
  • QQ A250/9
  • SAE J454

Fabrication and Heat Treatment

Machinability

Aluminium / Aluminum 5456 alloy has poor machinability. If machining is performed, oil lubricants and carbide tooling should be used.

Forming

Formability of Aluminium / Aluminum 5456 alloy is more difficult than the other Aluminium / Aluminum alloys. It should not be extensively cold worked.

Welding

Arc welding is the preferred welding method for Aluminium / Aluminum 5456 alloy, thus making it useful structural applications. Gas welding can also be used but results are not as good as arc welding.

Hot Working

Aluminium / Aluminum 5456 alloy can be hot worked at 218°C (425°F). This helps in avoiding the impact of high stress on extensively cold worked shapes.

Cold Working

Aluminium / Aluminum 5456 alloy has good cold working capacity but extensive cold working (over 20% reduction) should be avoided as this causes stress corrosion cracking when temperatures reach 66°C (150°F).

Annealing

Annealing of Aluminium / Aluminum 5456 alloy can be performed at 343°C (650°F). This should be followed by air cooling.

Hardening

Aluminium / Aluminum 5456 alloy can be hardened only by cold working (limited).

Applications

Aluminium / Aluminum 5456 alloy is widely used in the manufacture of the following products:

  • Marine applications
  • High strength welded structures
  • Pressure vessels

This alloy is also used in storage tanks.

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