Wrought aluminum alloy 6082

Chemical composition

Nominal chemical composition

Al-1Si-0,9Mg-0,7Mn

Chemical composition according to EN 573-3:2013

Table 1 - Chemical composition of the aluminum alloy 6082

The alloy designations

  • EN 573-3: EN AW-6082 и EN AW-Al Si1MgMn
  • Teal Sheets (Aluminum Association): 6082
  • Unified Numbering System (UNS): A96082
  • ISO 209:2007: 6082
  • DIN 1725-1 (canceled): AlMgS1 and 3.2315

Metallurgical characteristics

  • An alloy of 6xxx series
  • Deformable: by pressing and rolling methods
  • Thermally hardenable
  • The main alloying elements are magnesium, silicon and manganese in the form of additives
  • The strengthening component is the intermetallic compound Mg2Si.
  • At the nominal amount of chemical composition Mg compound2Si after artificial aging can reach about 1,4 % with excess silicon content 0,5 % [1]
  • Manganese compounds inhibite recrystallization and, thereby, they allow to control the morphology and grain size during heat treatments.
  • Typical tempers are T6 and T4.
  • Condition T6: quenching with water after heating for quenching at 540 ºC and artificial aging at 175 ° C within 8 hours [1]
  • T4 state: natural aging at 20 ° C for at least 8 days after heating for hardening as for condition T6 [1]
  • It has no analogues in the GOST 4784-97
  • The place of alloy 6082 among other 6xxx series alloys are shown . in the figure below

Important properties

  • Medium strength aluminum alloy
  • High corrosion resistance
  • It has the highest strength among the alloys of the 6xxx series. It is believed structural alloys.
  • In sheet form used for machining
  • A relatively new alloy. Most often used in Europe, than in North America. Due to the higher strength of an alloy is often used instead of 6061.
  • Additives large amount of manganese provide control of grain structure, what, in turn, It allows to achieve higher strength.
  • Difficult to manufacture thin walled extrusions complex.
  • The surface quality of extruded products below, than for other 6xxx series alloys
  • In states T6 and T651, it is well machined by cutting with the formation of long dense chips [2]

Typical applications

  • In passenger cars: side frame elements, door frames, body shell elements [1]
  • Highly loaded parts and components
  • bridges
  • cranes
  • transportation
  • Beams and trusses
  • Ore Buckets [2]
  • Beer barrels [2]
  • Milk cans [2]

Mechanical properties

Normalized mechanical properties

Table 2 –
Requirements for mechanical properties
extruded rods, pipes, profiles alloy 6082 в IN 755-2:2016

Typical mechanical properties

Table 3 - Typical mechanical properties of the alloy 6082 [1]

Physical properties

Density

2,70 g / cm³

Interval melting temperature

585-650 °C [3]

Thermal expansion

24 μm / (m · K)

Elastic modulus

70 GPa

Thermal conductivity

180 W / m · K

Technological properties

Weldability

  • Alloy 6082 It possesses good weldability, but it has a reduction of strength in the weld zone.
  • When welding itself recommended welding wire 4043 [2]
  • When welding alloy 6082 for alloy 7005 be applied Alloy 5356 [2]

The solderability

Lends itself well to soldering and brazing

The ability to cold forming

good

The ability to mechanical machining

good

Modifications

No

Sources:
1. Aluminium & Car: design, technology, innovation — Edimet Spa, 2005
2. Materials companies Aalco Metals Ltd
3. Materials from Nedal Aluminum (Netherlands)