Aluminium / Aluminum 6063 Alloy (UNS A96063)

Topics Covered

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

Introduction

Aluminum alloys lose some of their strength when exposed to high temperatures. However, their strength can be increased at subzero temperatures, thus making them a useful low-temperature alloy. They have high corrosion resistance. Aluminium / Aluminum 6063 alloy is known as an extrusion alloy.

The following datasheet gives an overview of Aluminium / Aluminum 6063 alloy.

Chemical Composition

The following table shows the chemical composition of Aluminium / Aluminum 6063 alloy.

Element Content (%)
Aluminum, Al 98.9
Magnesium, Mg 0.70
Silicon, Si 0.40

Physical Properties

The physical properties of Aluminium / Aluminum 6063 alloy are tabulated below.

Properties Metric Imperial
Density 2.7 g/cm3 0.0975
Melting point 622°C 1150°F

Mechanical Properties

The mechanical properties of Aluminium / Aluminum 6063 alloy are outlined in the following table.

Properties Metric Imperial
Tensile strength 90 MPa 13053 psi
Yield strength 48 MPa 6962 psi
Shear strength 69 MPa 10008 psi
Fatigue strength 55 MPa 7977 psi
Elastic modulus 70-80 GPa 10153-11603 ksi
Poisson's ratio 0.33 0.33
Hardness 25 25

Thermal Properties

The thermal properties of Aluminium / Aluminum 6063 alloy are given in the following table.

Properties Conditions
T (ºC) Treatment
Thermal expansion 23.4 (10-6/ºC) 20-100 -
Thermal conductivity 218 W/mK 25 -

Other Designations

Other designations that are equivalent to Aluminium / Aluminum 6063 alloy include:

  • ASTM B210
  • ASTM B221
  • ASTM B241
  • ASTM B345
  • ASTM B361
  • ASTM B429
  • ASTM B483
  • ASTM B491
  • MIL G-18014
  • MIL G-18015
  • MIL P-25995
  • MIL W-85
  • QQ A-200/9
  • SAE J454

Fabrication and Heat Treatment

Machinability

Aluminium / Aluminum 6063 alloy has average machinability.

Forming

Aluminium / Aluminum 6063 alloy has good hot or cold formability.

Welding

Aluminium / Aluminum 6063 alloy has good weldability.

Heat Treatment

Aluminium / Aluminum 6063 alloy is heat treated at 522°C (970°F) followed by quenching in water. This results in the production of T 4 temper. Other tempers can be produced by aging.

Forging

Aluminium / Aluminum 6063 alloy is hot forged at 260 to 510°C (500 to 950°F).

Hot Working

Aluminium / Aluminum 6063 alloy can be hot worked at temperatures ranging from 260 to 510°C (500 to 950°F)

Cold Working

Aluminium / Aluminum 6063 alloy has good cold working capacity.

Annealing

Aluminium / Aluminum 6063 alloy is annealed at 413°C (775°F) for 3 h followed by controlled cooling at 10 to 260°C (50 to 500°F) per hour, and air cooling.

Aging

Aluminium / Aluminum 6063 alloy can be aged at 177°C (350°F) for 8 h to produce T 6 and T 62 tempers. It can be aged at 183°C (360°F) to produce T5 temper.

Hardening

Aluminium / Aluminum 6063 alloy can be hardened by aging heat treatment and cold working.

Applications

Aluminium / Aluminum 6063 alloy is used in architectural extrusions. It is also used in manufacturing windows, pipe railing, furniture, and stair rails.

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