Aluminium / Aluminum 5657 Alloy (UNS A95657)

Topics Covered

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

Introduction

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

Aluminium / Aluminum 5657 alloy is a non-heat treatable alloy with medium strength. The following datasheet will provide more details about Aluminium / Aluminum 5657 alloy.

Chemical Composition

The following table shows the chemical composition of Aluminium / Aluminum 5657 alloy.

Element Content (%)
Aluminium, Al 99.2
Magnesium, Mg 0.8

Physical Properties

The physical properties of Aluminium / Aluminum 5657 alloy are outlined in the following table.

Properties Metric Imperial
Density 2.6-2.8 g/cm3 0.0939-0.1011 lb/in3

Mechanical Properties

The mechanical properties of Aluminium / Aluminum 5657 alloy are tabulated below.

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

Other Designations

Equivalent materials to Aluminium / Aluminum 5657 alloy are as follows:

  • ASTM B209
  • SAE J454

Fabrication and Heat Treatment

Machinability

The machinability of Aluminium / Aluminum 5657 alloy is rated as fair. As it becomes ‘gummy’, this alloy requires a lot more attention to obtain a good finish. Other than in very light machining, all other machining should be done using oil lubricants.

Forming

Both hot and cold forming is easy to perform with Aluminium / Aluminum 5657 alloy using the conventional methods. However, in the harder temper, cold working is quite difficult.

Welding

Aluminium / Aluminum 5657 alloy can be welded using the conventional methods. The widely used methods are resistance welding, arc, and gas torch. It is suitable to use AL 5457, AL 5056, or AL5052 as filler metal. This alloy can also be joined by brazing; however, this requires special processes and trial evaluation.

Forging

Aluminium / Aluminum 5657 alloy can be hot forged.

Hot Working

Hot working can be easily performed on Aluminium / Aluminum 5657 alloy at the temperature range of 371 to 232°C (700 to 450°F).

Cold Working

Aluminium / Aluminum 5657 alloy is suited for cold working by commercial methods when in the soft temper state. Although possible, it is more difficult in harder tempers.

Annealing

Annealing is mainly performed to obtain O temper using a cold worked material. The process is carried out at 413°C (775°F) and air cooled. A stress-relief anneal can also be performed at 238°C (460°F) for 3 hours followed by air cooling.

Hardening

Aluminium / Aluminum 5657 alloy can be hardened by cold working only.

Applications

Aluminium / Aluminum 5657 alloy is widely used in the manufacture of appliance trim and anodized auto.

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