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Aluminum Alloy Series: Types, Properties, and Uses

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The specific gravity of aluminum is lighter, resulting in less rebound during forming.

It has a relatively high strength, comparable or exceeding that of high-quality steel.

Aluminum has good plasticity, making it easier to form complex products.

It is easier to work with than stainless steel and has excellent electrical conductivity, thermal conductivity, and resistance to corrosion.

At present, the surface treatment processes of aluminum, such as anodic oxidation and brushing, sandblasting, are well-developed, and aluminum is widely used in cell phones.

Series Of Aluminum And Aluminum Alloy

Aluminum alloy can be divided into two types based on processing method: deformed aluminum alloy and cast aluminum alloy. Additionally, the series of aluminum and aluminum alloys are mainly divided into eight series.

Representation of alloy grades

International brand (using four Arabic numerals, now commonly used):

  • 1XXX indicates that it ispure aluminum series with more than 99% such as 1050 and 1100.
  • 2XXX indicates that it is an aluminum-copper alloy series such as 2014.
  • 3XXX indicates that it is an aluminum-manganese alloy series such as 3003.
  • 4XXX indicates that it is an aluminum-silicon alloy series such as 4032.
  • 5XXX indicates that it is an aluminum-magnesium alloy series such as 5052.
  • 6XXX indicates that it is an aluminum-magnesium-silicon alloy series such as 6061, 6063.
  • 7XXX indicates that it is an aluminum-zinc alloy series such as 7001.
  • 8XXX indicates that it is an alloy system other than that mentioned above.
Series Of Aluminum And Aluminum Alloy

8 Series Of Aluminum And Aluminum Alloy

1XXX Series

According to the processing method, aluminum alloy can be divided into deformed aluminum alloy and cast aluminum alloy, and the serial number of aluminum and aluminum alloy is mainly divided into eight series.

Among these series, the 1000 series has the highest aluminum content, with a purity of over 99.00%. The last two digits of the 1000 series aluminum plate determine the minimum aluminum content of the series. For example, the last two digits of the 1050 series are 50, which means the aluminum content must be at least 99.5% to meet international brand naming standards.

The primary aluminum has good formability and surface treatment properties, with excellent corrosion resistance. However, its strength decreases as its purity increases.

Alloy systemAlloy numberSummary of material properties
JISA.A
1000 series10601060As a conductive material, IACS guarantees 61%, and 6061 is used when strength is required
1085
1080
1070
1050
1030
1085
1080
1070
1050
It has good formability and surface treatment.Among aluminum alloys, its corrosion resistance is the best because it is pure aluminum with low strength.The higher the purity, the lower the strength.
1100
1200
1100
1200
General purpose aluminum with Al purity of more than 99.0% is slightly white after anodizing, which is the same as the above.
1000The strength is slightly higher than 1100, the formability is good, and its chemical properties are the same as 1100.

The ones commonly used on mobile phones are 1050, 1070, 1080, 1085, 1100, do simple extrusion molding (without bending), of which 1050 and 1100 can do chemical sand, glossy, fog, normal effect, with obvious material lines and good coloring effect; 1080 and 1085 specular aluminum are often used to do bright word, fog effect, no obvious material lines.

The first series of aluminum are relatively soft and are mainly used for decoration or interior decoration.

2XXX Series

It is characterized by high hardness but poor corrosion resistance, among which the content of copper is the highest.

2000 series aluminum alloy represents 2024, 2A16, 2A02.

The copper content of 2000 series aluminum sheet is about 3% to 5%.

2000 series aluminum bars belong to aviation aluminum materials, which are used as structural materials, but are not often used in conventional industries at present.

Alloy systemAlloy numberSummary of material properties
JISA.A
2000 series20112011Fast cutting alloy, good machinability and high strength.But the corrosion resistance is poor. When corrosion resistance is required, 6062 series alloy shall be used
2014
2017
2024
2014
2017
2024
Containing a large amount of Cu, the corrosion resistance is poor, but the strength is high, so it can be used for construction materials.Forged products can also be used.
21172117After solid solution heat treatment, it is used as hinge nail material, which is an alloy to delay the aging rate at room temperature.
2018
2218
2018
2218
Alloy for forging.Good forging property and high temperature strength, so
Used for forgings requiring heat resistance.Poor corrosion resistance.
26182618Alloy for forging.High temperature strength is superior, but corrosion resistance is poor.
22192219High strength, and high temperature characteristics, excellent solubility, but poor corrosion resistance.
20252025Alloy for forging.Good forging property and high strength, but poor corrosion resistance.
2001Alloy for forging.It has heat resistance and high strength, but the corrosion resistance is not good

3XXX Series

3000 series aluminum bars are mainly composed of manganese.

3000 series aluminum alloy representatives are 3003, 3105, 3A21-based.

The manganese content is between 1.0% and 1.5%, which is a series with good anti-rust function.

It is often used as grooves and tanks for liquid products, building workpieces, construction tools, all kinds of lamp parts, and various pressure vessels and pipes for sheet processing.

Good formability, solubility and corrosion resistance.

Alloy systemAlloy numberSummary of material properties
JISA.A
3000 Series3003
3203
3003
3203
The strength is about 10% higher than 1100, and the formability, solubility and corrosion resistance are good.
3004
3104
3004
3104
Higher strength than 3003, superior formability and good corrosion resistance.
30053005The strength is about 20% higher than that of 3003, and the corrosion resistance is also better.
31053105The strength is slightly higher than 3003, and other characteristics are similar to 3003.

4XXX Series

Usually the silicon content is between 4.5% and 6.0%, the higher the silicon content is, the higher the strength is.

The 4000 series aluminum bars represent 4A01, and the 4000 series aluminum plates belong to the series with high silicon content.

Less solidification shrinkage, belonging to building materials, mechanical parts, forging materials, welding materials;

Low melting point, good corrosion resistance, heat resistance and wear resistance.

Alloy systemAlloy numberSummary of material properties
JISA.A
4000 series40324032Good heat resistance, abrasion resistance and low coefficient of thermal expansion.
40434043Less solidification shrinkage, treated with sulfuric acid anodizing, showing a natural gray color.
Series Of Aluminum And Aluminum Alloy

5XXX Series

5000 series aluminum bar belongs to the more commonly used alloy aluminum plate series, the main element is magnesium, the magnesium content is between 3-5%.

5000 series aluminum alloy represents 5052, 5005, 5083, 5A05 series.

It can also be called aluminum-magnesium alloy.

The main characteristics are low density, high tensile strength and high elongation.

Under the same area, the weight of Al-mg alloy is lower than that of other series, so it is widely used in conventional industry.

Alloy systemAlloy numberSummary of material properties
JISA.A
5000 Series50055005
5050
The strength is the same as that of 3003, with good processability, solubility and corrosion resistance.The modification processing after anodizing is good, which is commensurate with the color of 6063 shape material.
50525052It is the most representative alloy with medium strength, with good corrosion resistance, solubility and formability, especially high fatigue strength and good seawater resistance.
56525652The alloy that limits the impure elements of 5052 and inhibits the separation of hydrogen peroxide.Other properties are the same as those of 5052
51545154The strength is about 20% higher than 5052, and other characteristics are the same as 5052
52545254The alloy that limits the impure elements of 5154 and inhibits the decomposition of hydrogen peroxide has the same other properties as 5154.
54545454The strength is about 20% higher than that of 5052, and its characteristics are roughly the same as those of 5154, but its corrosion resistance in vicious environment is better than that of 5154.
50565056Excellent corrosion resistance, cutting and working surface modification, good anodizing and dyeing.
50825082The strength is similar to 5083, and the formability and corrosion resistance are good.
51825182The strength is about 5% higher than 5082, and other characteristics are the same as 5082.
50835083Alloy for fusion construction.It is the highest strength corrosion-resistant alloy in practical non heat treated alloys and is suitable for solution bonding structures.Good seawater resistance and low temperature characteristics
50865086The strength is higher than that of 5154.It is a non heat treatment fusion structure alloy with good seawater resistance.
5001The strength is the same as that of 3003, and the anodizing treatment after brilliant treatment can have high brilliance.Good formability and corrosion resistance.
5002Alloy for hinge nail, good seawater resistance

The most commonly used on mobile phones is 5052, which is the most representative alloy with medium strength, good corrosion resistance, solubility and formability, especially high fatigue strength, good sea water resistance, and is often used to do products with high strength.

But its coloring effect is not ideal, so it is suitable for sandblasting process, not suitable for chemical sand blasting, fog surface, etc., mainly using casting molding, not suitable for extrusion molding.

6XXX Series

6000 series aluminum alloy represents 6061, which mainly contains magnesium and silicon, so it integrates the advantages of 4000 series and 5000 series.

6061 is a cold-treated aluminum forging product, which is suitable for applications requiring high corrosion resistance and oxidation resistance.

Good usability, easy coating and good processability.

Alloy systemAlloy numberSummary of material properties
JISA.A
6000 Series60616061Heat treated corrosion resistant alloy.T6 treatment can have a very high endurance value, but the strength of the fusion interface is low, so it is used for screws and hinge screws
6001The medium strength extrusion alloy has the middle strength of 6061 and 6063.It has good extrusion, stamping and quenching properties. It can be used as large thin meat shape materials with complex shapes.It has good corrosion resistance and fusion joint.
60636063The representative extrusion alloy has lower strength than 6061 and good extrudability.It can be used as shape material with complex section shape, with good corrosion resistance and surface treatment
61016101High strength conductive material. 55% ACS guarantee
61516151It has excellent forging processability, corrosion resistance and surface treatment.It is suitable for complex forging products.
6262Corrosion resistance fast cutting alloy has better corrosion resistance and surface treatment than 2011, and its strength is the same as 6061.

6061 and 6063 are mostly used on mobile phones.

The strength of 6061 is higher than that of 6063.

Casting molding can cast more complex structures and can be used as snap parts, such as battery cover, etc.

7XXX Series

It mainly contains zinc, and 7000 series aluminum alloy represents 7075.

It also belongs to the Aviation series.

It is aluminum magnesium zinc copper alloy, heat treatable alloy, superhard aluminum alloy and has good wear resistance.

Alloy systemAlloy numberSummary of material properties
JISA.A
7000 series70727072The electrode potential is low.It is mainly used for anti-corrosion covering leather materials.It is also suitable for the heat sink of heat exchanger.
70757075One of the aluminum alloys with the highest strength, but the corrosion resistance is poor.The coating material with 7072 can improve its corrosion resistance, but the cost is increased.
70507050The alloy with improved quenching property of 7075 has good stress corrosion cracking resistance.It is suitable for thick plates and forged products
7001The alloy for welding structure has high strength, and the strength of the welding part can be returned to the strength close to the base metal when placed at room temperature.Corrosion resistance is also very good.
70037003The extrusion alloy for fusion structure has slightly lower strength than 7N01, but has good extrudability.It can be used as a large shape material with thin meat.Other characteristics are roughly the same as 7N01.

8XXX Series

8011 is commonly used in 8000 Series aluminum alloy, which belongs to other series.

Most applications are aluminum foil, which is not commonly used in the production of aluminum rods.

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