Why do we use the series 6 Aluminum Alloys?

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Aluminum alloys are categorized into 9 series based on the proportion of aluminum combined with other elements to suit its properties for specific applications. For example, series 1 aluminium has a purity of at least 99%, while the series 2 is alloyed with Copper.

At Tostem Thai, whose main products are doors and windows, our primary use is series 6 aluminum alloy. This alloy is a combination of Aluminum, Magnesium, and Silicon. Widely known for its outstanding high corrosion resistance, strength, extrudability, and surface treatment.

Within the series 6 aluminum alloys, Tostem Thai offers 4 grades:

6063 is one of the most globally popular alloys for aluminum extrusion. Its key advantages are its excellent surface finish with higher strength compared to 6060, while remaining easy to extrude. Therefore, it is ideal for applications that require both strength and a great visual appearance. These properties make 6063 perfect for architectural and decorative applications.

Architectural

- Facade

- Curtainwall

- Door frames

- Louvers

- Thermal Management Systems

Electronics

- Heat Sinks

- Appliance Handles / Frames

Automotive
- Roof Rails

- Side Steps

Machinery

- Brackets and Joint Connectors

6060 is known for its high ductility due to lower amounts of Magnesium and Silicon which are the hardening elements. This provides it exceptional extrudability, making it ideal for complex, thin-walled profiles. It is particularly popular across Europe and Australia. With an outstanding response to anodising and powder coating, 6060 delivers a flawless finish. This makes it suitable for architectural and decorative applications that prioritise superior formability and bending over the higher strength of 6063.

Architectural

- Facades

- Curtain Wall

- Door Frames

- Thermal Management

Electronics

- Heat Sinks

- Appliance Handle/Frame

Automotive

- Roof Rails

- Side Steps

Machinery

- Brackets and Joint Connectors.

6005C features a medium-to-high strength profile positioning it right between 6063 and 6061. It stands out for its high extrudability, good corrosion resistance, and excellent weldability, making it ideal for producing intricate, complex extruded profiles. This makes it perfect for solar cells, architectural structures, transportation, industrial components, automotive parts and marine structural profiles such as ships.

Architectural

- Scaffolding & Ladders

- Solar Cell Clamp

Automotive

- Door Frames & Body Structures

- Bumper Beams

Information Technology

- Server Chassis Rails

6061 stands out for its medium-to-high strength while maintaining light weight compared to steel. Its versatile balance of properties makes it widely utilised in various businesses with high-strength products, automotive and aerospace components, structures, and electronic parts.

Architectural

- Scaffolding & Ladders

- Walkways & Footbridges

Machinery

- CNC : Gantry and Upright Columns

Automotive

- Battery Trays / Enclosure, Bumper Beams

6082 is the highest strength alloy of all the four alloys mentioned. Known as a structural alloy, it offers superior tensile strength while maintaining a lightweight profile compared to steel. This versatile balance of high mechanical performance and durability makes it widely utilised in heavy-duty applications, structural bridges, cranes, automotive and transport components, and high-stress engineering frameworks.

Architectural

- Canopies

- Skylights

Electronics

- Arm Damper Hard Disk Drive

Automotive

- Battery EV Locker / Reinforcement

- Battery Case Reinforcement

With over 40 years of experience, we are specialised in manufacturing industry-leading quality products using all five alloys.