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Aluminium Alloys

An aluminum alloy is a chemical composition where other elements are added to pure aluminum in order to enhance its properties, primarily to increase its strength. These other elements include iron, silicon, copper, magnesium, manganese and zinc at levels that combined may make up as much as 15 percent of the alloy by weight. Alloying requires the thorough mixing of aluminum with these other elements while the aluminum is in molten – liquid – form.

An aluminum alloy is a chemical composition where other elements are added to pure aluminum in order to enhance its properties, primarily to increase its strength. These other elements include iron, silicon, copper, magnesium, manganese and zinc at levels that combined may make up as much as 15 percent of the alloy by weight. Alloys are assigned a four-digit number, in which the first digit identifies a general class, or series, characterized by its main alloying elements.

Some alloys are strengthened by solution heat-treating and then quenching, or rapid cooling. Heat treating takes the solid, alloyed metal and heats it to a specific point. The alloy elements, called solute, are homogeneously distributed with the aluminum putting them in a solid solution. The metal is subsequently quenched, or rapidly cooled, which freezes the solute atoms in place. The solute atoms consequently combine into a finely distributed precipitate. This occurs at room temperature which is called natural aging or in a low temperature furnace operation which is called artificial aging.

Non-heat treated alloys are strengthened through cold-working. Cold working occurs during rolling or forging methods and is the action of “working” the metal to make it stronger. For example, when rolling aluminum down to thinner gauges, it gets stronger. This is because cold working builds up dislocations and vacancies in the structure, which then inhibits the movement of atoms relative to each other. This increases the strength of the metal. Alloying elements like magnesium intensify this effect, resulting in even higher strength.

Specifications :

ALLOY GROUP

PRINCIPAL ALLOYING ELEMENT

 

1xxx

Unalloyed Aluminum

Purity of 99.0% or Greater

2xxx

Copper

Heat Treatable Alloys

3xxx

Manganese

 

4xxx

Silicon

Low Melting Point Alloys

5xxx

Magnesium

 

6xxx

Magnesium and Silicon

Heat Treatable Alloys

7xxx

Zinc

Heat Treatable Alloys

8xxx

Other Elements

 

Chemical Composition :

Alloy

Si

Fe

Cu

Mn

Mg

Cr

Zn

Ti

OTHERS

OTHERS

Al

EACH

TOTAL

MIN.

1070

0.20

0.25

0.04

0.03

0.03

0.04

0.03

0.03

99.70

1060

0.25

0.35

0.05

0.03

0.03

0.05

0.03

0.03

99.60

 

1050

0.25

0.40

0.05

0.05

0.05

0.05

0.03

0.03

99.50

1350

0.10

0.40

0.05

0.01

0.01

0.05

0.03

0.10

99.50

1145

0.55 Si + Fe

0.05

0.05

0.05

0.05

0.03

0.03

99.45

1100

0.95 Si + Fe

0.05-0.20

0.05

0.10

0.05

0.15

99.00

2024

0.50

0.50

3.8-4.9

0.30-0.9

1.2-1.8

0.10

0.25

0.15

0.05

0.15

Rem.

 

 

 

 

 

 

 

 

 

 

 

 

3003

0.6

0.7

0.05-0.20

1.0-1.5

0.10

0.05

0.15

Rem.

 

 

 

 

 

 

 

 

 

 

 

 

3004

0.30

0.7

0.25

1.0-1.5

0.8-1.3

0.25

0.05

0.15

Rem.

 

 

 

 

 

 

 

 

 

 

 

 

3005

0.6

0.7

0.30

1.0-1.5

0.20-0.6

0.10

0.25

0.10

0.05

0.15

Rem.

 

 

 

 

 

 

 

 

 

 

 

 

3104

0.6

0.8

0.05-0.25

0.8-1.4

0.8-1.3

0.25

0.10

0.05

0.15

Rem.

 

 

 

 

 

 

 

 

 

 

 

 

4004

9.0-10.5

0.8

0.25

0.10

1.0-2.0

0.20

0.05

0.15

Rem.

 

 

 

 

 

 

 

 

 

 

 

 

4104

9.0-10.5

0.8

0.25

0.10

1.0-2.0

0.20

0.05

0.15

Rem.

 

 

 

 

 

 

 

 

 

 

 

 

4043

4.5-6.0

0.8

0.30

0.05

0.05

0.10

0.20

0.05

0.15

Rem.

 

 

 

 

 

 

 

 

 

 

 

 

4045

9.0-11.0

0.8

0.30

0.05

0.05

0.10

0.20

0.05

0.15

Rem.

 

 

 

 

 

 

 

 

 

 

 

 

5005

0.30

0.7

0.20

0.20

0.50-1.1

0.10

0.25

0.05

0.15

Rem.

 

 

 

 

 

 

 

 

 

 

 

 

5050

0.40

0.7

0.20

0.10

1.1-1.8

0.10

0.25

0.05

0.15

Rem.

 

 

 

 

 

 

 

 

 

 

 

 

5052

0.25

0.40

0.10

0.10

2.2-2.8

0.15-0.35

0.10

0.05

0.15

Rem.

 

 

 

 

 

 

 

 

 

 

 

 

5252

0.08

0.10

0.10

0.10

2.2-2.8

0.05

0.03

0.10

Rem.

 

 

 

 

 

 

 

 

 

 

 

 

5056

0.30

0.40

0.10

0.05-0.20

4.5-5.6

0.05-0.20

0.10

0.05

0.15

Rem.

 

 

 

 

 

 

 

 

 

 

 

 

5657

0.08

0.10

0.10

0.03

0.6-1.0

0.05

0.02

0.05

Rem.

5182

0.20

0.35

0.15

0.20-0.50

4.0-5.0

0.10

0.25

0.10

0.05

0.15

Rem.

6061

0.40-0.8

0.7

0.15-0.40

0.15

0.8-1.2

0.04-0.35

0.25

0.15

0.05

0.15

Rem.

7075

0.40

0.50

1.2-2.0

0.30

2.1-2.9

0.18-0.28

5.1-6.1

0.20

0.05

0.15

Rem.

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