ThePipingMart Blog Grades Aluminium 2055 Alloy – Composition, Properties, and Uses

Aluminium 2055 Alloy – Composition, Properties, and Uses

Aluminium 2055 Alloy - Composition, Properties, and Uses

Aluminum 2055 is an age-hardenable alloy that provides superior strength and corrosion resistance. It can be used for various structural components such as aircraft, automobiles and boats. Aluminium 2055 consists of copper, magnesium, manganese, iron and zinc, making it a highly versatile alloy. In this blog post, we will discuss the chemical properties, mechanical properties, physical properties, uses and machining of Aluminium 2055.


Aluminum 2055 is a metal alloy composed primarily of aluminium, copper, magnesium, and manganese that was developed in the 1990s. The composition of this material gives it the perfect combination of strength and weight: it’s significantly lighter than other metals but almost twice as strong as some of its counterparts. As a result, Aluminum 2055 is an ideal choice for many applications where lightness is important without sacrificing strength or durability. Its unique mix of materials also makes it highly corrosion-resistant and well-suited for use in coastal locations.

Component Elements Properties Metric English
Aluminum, Al 91.43 – 94.95 % 91.43 – 94.95 %
Copper, Cu 3.2 – 4.2 % 3.2 – 4.2 %
Iron, Fe <= 0.10 % <= 0.10 %
Lithium, Li 1.0 – 1.3 % 1.0 – 1.3 %
Magnesium, Mg 0.20 – 0.60 % 0.20 – 0.60 %
Manganese, Mn 0.10 – 0.50 % 0.10 – 0.50 %
Other, each <= 0.05 % <= 0.05 %
Other, total <= 0.15 % <= 0.15 %
Silicon, Si <= 0.07 % <= 0.07 %
Silver, Ag 0.20 – 0.70 % 0.20 – 0.70 %
Titanium, Ti <= 0.10 % <= 0.10 %
Zinc, Zn 0.30 – 0.70 % 0.30 – 0.70 %
Zirconium, Zr 0.05 – 0.15 % 0.05 – 0.15 %

Chemical Properties

Grade 2055 has a high level of corrosion resistance due to its high levels of chromium. It also contains small amounts of nickel, which helps with its heat resistance. Furthermore, its low silicon content allows it to maintain formability in hot temperatures. Due to its chemical composition, it is able to withstand exposure to many different environments without corroding or becoming damaged.

Mechanical Properties

This alloy has excellent strength and toughness when compared to other aluminum alloys. Its tensile strength is around 550 MPa while its yield strength is around 520 MPa. Additionally, its elongation at break is 12%. These properties make it suitable for use in applications that require strong parts such as aircraft engines or automotive components.

Physical Properties

The density of alloy 2055 is 2.69 g/cm3, which makes it relatively light weight compared to other metals like steel or titanium. Its melting point is around 545 °C which means it can be easily formed into various shapes through casting or welding processes without losing any of its structure or strength. Furthermore, it has a low thermal expansion rate which makes it ideal for use in applications where temperature changes may occur frequently.


This 2048 alloy has been used extensively in the aerospace industry due to its high strength and corrosion resistance properties. Additionally, it can be used for other structural components such as automobiles and boats because of its ability to withstand extreme temperatures without corroding or becoming damaged over time. Furthermore, since it has a low thermal expansion rate, it makes an excellent choice for applications involving quick temperature changes such as turbochargers or exhaust systems in automobiles or aircraft respectively.


This alloy can be machined using standard tooling like carbide end mills but the cutting speed must be relatively slow due to the hardness of the material (HB 90). Additionally, coolant should always be used when machining this material in order to reduce friction between the tool and the workpiece as well as improve chip flow out of the cut area so that there are no chips left behind after machining operations are complete. Finally, cuts should not be too deep in order to avoid damaging the material during machining operations .

Corrosion Resistance

Aluminium 2055 is a very popular alloy in the aerospace industry due to its excellent corrosion resistance properties. This alloy has a unique combination of treated aluminum and magnesium which provides it with outstanding weight to strength ratio and helps reduce fuel consumption. It is resistant to atmospheric corrosion, saltwater brines, gaseous atmospheres, and diverse chemicals. Aluminium 2055 offers very good performance where moderate stress and enhanced corrosion resistance are needed. It is regularly used for tubular components in an aircraft’s midbody section, as well as secondary structures in its extended fuselage. When compared with other alloys, it stands out due to its ability to cost-effective corrosion protection without sacrificing performance.

Heat Resistance

Aluminium 2055 is quickly becoming a popular choice for manufacturers in the aerospace, automotive, and construction industries due to its superior heat resistance. This alloy has a melting point of 533°C (987°F) and can withstand temperatures up to 180°C (356°F) without undergoing any chemical or other physical changes that could compromise its integrity. Moreover, Aluminum 2055 is known for its high tensile strength and corrosion-resistance which make it an excellent choice for applications that need materials with greater durability or temperature ranges than those offered by traditional alloys. The versatility of this alloy means that it can be used for many other purposes such as components for roofing systems and casings for tables. In short, Aluminium 2055 has proven itself to be an unstoppable force in the world of fabrication due to its amazing heat resistance properties.

Heat Treatment

Aluminum 2055 is a type of heat treatable alloy that can be used in a variety of applications. Heat treatment helps to improve the physical properties of this alloy, producing pieces with superior strength and corrosion resistance. By varying the temperature and time spent in the heat treatment process, Aluminium 2055 can be altered for specific projects, lending it great versatility to many industries including engineering components and aircraft parts. Heat treating also allows for improved mechanical properties such as hardness, ductility, and machinability. With proper heat treatment Aluminum 2055 provides an ideal balance between lightweight yet resilient production items with reliability, making it an excellent choice in many environments.


Aluminum 2055 Welding is a technique which is increasingly used in many industries due to its superior properties and benefits. The process involves joining two pieces of aluminium together by heating the material with an electric arc, while a filler metal is added to create a strong bond. This offers excellent strength, exceptional corrosion resistance and low thermal expansion at an affordable cost. Aluminum 2055 welding solutions are ideal for marine applications and are now commonly used in aerospace, military, transportation and construction segments too. Thanks to this technique’s versatile nature and long-lasting performance, it is quickly becoming one of the most popular types of welding processes on the market today.


In conclusion, Aluminium 2055 is a versatile alloy with superior strength and corrosion resistance, making it suitable for a wide range of applications including aerospace components and automotive parts amongst others. It has excellent chemical properties thanks to its high chromium content while also having good mechanical properties such as tensile strength up to 550 MPa and a low thermal expansion rate making it an ideal choice for applications involving quick temperature changes like turbochargers or exhaust systems in automobiles or aircrafts respectively . Lastly ,it can be machined using standard tooling with some modifications being made depending on the application requirements .Thus , it’s no surprise that this alloy is one of the most widely used aluminium alloys today!

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