ThePipingMart Blog Grades Aluminium 6063 Alloy – Composition, Properties and Uses

Aluminium 6063 Alloy – Composition, Properties and Uses

Aluminium 6063

Aluminium 6063 is a versatile and widely used alloy. It has exceptional corrosion resistance properties, which makes 6063 Alloy ideal for applications like window frames, doors, roofing and exterior trims. Additionally, its heat resistance qualities make it suitable for high-temperature applications such as airframes and aircraft components. In this blog post, we’ll explore the uses of aluminum 6063, its corrosion resistance properties, heat resistance features, heat treatment processes and machining and welding capabilities.

6063 Alloy Composition

Element 6063 % Present 6063A % Present
Si 0.2 to 0.6 0.3 to 0.6
Fe 0.0 to 0.35 0.15 to 0.35
Cu 0.0 to 0.1 0.1
Mn 0.0 to 0.1 0.15
Mg 0.45 to 0.9 0.6 to 0.9
Zn 0.0 to 0.1 0.0 to 0.15
Ti 0.0 to 0.1 0.1
Cr 0.1 max 0.05
Al Balance Balance

6063 Alloy Mechanical Properties

BS EN 755-2:2008
Rod & Bar
Up to 200mm Dia.
Property Value
Tensile Strength 130 Max MPa
Elongation A50 mm 16 Min %
Hardness Brinell 25 HB
Elongation A 18 Min %

6063 Alloy Physical Properties

Property Value
Density 2700 kg/m3
Melting Point 600°C
Modulus of Elasticity 69.5 GPa
Electrical Resistivity 0.35 x 10-6 Ω.m
Thermal Conductivity 200 W/m.K
Thermal Expansion 23.5 x 10-6/K

6063 Alloy Uses

aluminium 6063 is commonly used in architectural extrusions for windows frames, door frames, roofs and curtain wall systems. It is also frequently used in the production of furniture components, air conditioning ducts, electrical fittings and various other industrial applications where the strength-to-weight ratio is a primary consideration.

Corrosion Resistance

Aluminium 6063 provides excellent corrosion resistance due to its ability to form an oxide layer on its surface that protects it from further oxidation. This oxide layer helps protect the metal from water damage and chemical exposure. This makes it ideal for outdoor applications where the metal may be exposed to harsh conditions such as high humidity or salty oceanic atmospheres.

Heat Resistance

aluminum 6063 can withstand temperatures up to 1000°C (1 832°F). This makes it suitable for use in high-temperature environments, such as aerospace components or industrial machinery parts that require long-term use at elevated temperatures without losing structural integrity or corroding over time.

Heat Treatment

Heat treatment is an important process for aluminium alloys because it allows them to retain their strength even when exposed to extreme temperatures or heavy loads. Heat treatment of aluminium alloys involves heating the metal above its recrystallization temperature followed by rapid cooling through quenching in order to increase its strength and hardness while maintaining good ductility and toughness.


Machining aluminium alloys can be tricky because they tend to deform easily when subjected to high cutting forces or speeds. As such, special care must be taken when machining aluminium alloys like 6063 due to their higher levels of hardness compared with pure aluminum alloys. The most effective way of machining these alloys is by using slow speeds and low levels of feed pressure along with coolant lubricants during the cutting process.


Welding aluminum alloys like 6063 can be difficult because they are prone to cracking if not done properly. To reduce this risk, welders should use a combination of low heat input settings combined with slow welding speeds while maintaining a proper gap between the parts being welded together. Additionally, preheating helps reduce thermal stresses, which can lead to cracking during the welding process, so preheating should always be done prior to welding an aluminium alloy like 6063.


The versatility of Aluminium60 63 makes it a popular choice for creating both structural components and decorative products alike due to its superior corrosion resistance properties coupled with its excellent machinability characteristics and easy weldability traits. With its impressive heat resistance capabilities allowing it to withstand temperatures up to 1000°C (1 832°F), this dependable alloy is perfect for any application requiring superior strength-to-weight ratio performance. Whether you’re looking for window frames, door trim, air conditioning ducts, or any other product requiring superior corrosion resistance without sacrificing strength, then look no further than Aluminium6063. Thanks for reading!

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