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Aluminium 1100 Pipes – Composition, Properties, and Uses

Aluminium 1100 Pipes

Aluminium 1100 is a type of aluminium alloy widely used in various industries globally. Its corrosion-resistant properties, low-density and lightweight nature, high ductility, and conductivity make it versatile for different applications. This article will focus on the aluminium 1100 pipes and their key characteristics, including their composition, physical and mechanical properties, uses, heat treatment, and corrosion resistance.


What is Aluminium 1100 Pipes?

Al 1100 pipes are strong, lightweight, corrosion-resistant, and commonly used in plumbing and insulation applications. They offer excellent ductility, strength, durability, and malleability, making them the perfect choice for various projects.

Aluminium 1100 Pipes Composition

1100 Aluminium pipes are made of pure aluminium, with a minimum aluminium content of 99%. They also contain small amounts of other elements, including silicon, iron, copper, manganese, and zinc. The presence of these impurities enhances the strength, ductility, and formability properties of the pipes.

Alloy Fe Si Mg Mn Cu Zn Ti Cr Each AI
1100 (min) 0.35 0.25 0.01 0.01 0.05 0.01 0.020 Trace 0.05 99.60%
1100 (max) 0.50 0.35 0.03 0.05 0.20 0.05 0.030 Trace 0.15 remainder

Aluminium 1100 Pipes Physical Properties

UNS A91100 pipes have several physical properties that make them a preferred choice. These properties include a low density of 2.71 g/cm^3, a high melting point of 600°C, and a good thermal conductivity of 229W/(mK). The low density of these pipes makes them a lightweight option, ideal for applications that require durability and ease of transportation.

Aluminium 1100 Pipes Mechanical Properties

1100 Al pipes exhibit good strength, ductility, and formability when subjected to mechanical stress. The tensile strength of these pipes ranges between 68,000 and 95,000 psi, while Young’s modulus is between 57 and 70 GPa. The pipes also have good elongation properties, with values of up to 35 per cent before fracture. These favourable mechanical properties make them an excellent material for several applications.

Alloy Temper UTS(Mpa) % Elongation
Min Max 0.5 mm -0.8 mm 0.81 mm – 1.30 mm 1.30 mm – above
1100 O 75 110 20 25 29
H12 95 130 5 6 7
H14 110 145 3 4 5
H16 130 165 2 3 4
H18 150 2 2 3

Aluminium 1100 Pipes Equivalent

Aluminium 1100 A91100

Aluminium 1100 Pipes Thermal Properties

Properties Conditions
T (°C) Treatment
Thermal Expansion (10 -6/C°) 23.6 25
Thermal Conductivity (W/m-K) 218 25 H18

Aluminium 1100 Pipes Uses

Aluminium alloy 1100 pipes have diverse uses in different industries worldwide. For example, they are used in the aviation and aerospace industry to manufacture aircraft parts, such as wheels, landing gear, and fuselage frameworks. The automotive industry also uses pipes to manufacture car body structures and other parts. The construction industry uses these pipes to produce windows, doors, roofing, and siding. They are also valuable in the food industry for manufacturing cans due to their high corrosion resistance.

Aluminum 1100 Pipes Heat Treatment

Al alloy 1100 pipes do not respond to heat treatment because they are composed mostly of pure aluminium, which makes them malleable and easy to form. For this reason, they are often cold-worked to increase their strength and hardness.

Aluminium 1100 Pipes Corrosion Resistance

Aluminium 1100 pipes have excellent corrosion resistance due to the high levels of pure aluminium and the presence of other impurities that enhance their ability to resist rust and other forms of corrosion. They also have a natural oxide layer that forms on their surface when exposed to air, providing additional protection.



In conclusion, aluminium 1100 pipes are an excellent choice for various applications due to their high ductility, low density, and strong corrosion resistance. Their excellent mechanical and physical properties make them a preferred option in different industrial fields worldwide. Understanding the composition and other properties of aluminium 1100 pipes can help users maximize their benefits and improve their performance.

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