6351 T4 aluminum alloy belongs to the Al-Mg-Si based 6000 series and is developed especially for extrusion applications. This alloy is widely used in pipe and profile production. The T4 temper refers to solution heat treatment and natural aging, which provides good formability while offering lower strength compared to the T6 temper. Compared to 6063, it offers higher strength but lower surface quality.

In terms of corrosion resistance, 6351 T4 provides good performance and can be safely used in atmospheric conditions. Due to its magnesium and silicon content, a protective oxide layer forms on the surface. It has corrosion resistance similar to 6061 and is significantly superior to 2024 alloy. It can be used in marine environments, although it does not provide the same level of resistance as 5083.

Regarding strength and mechanical properties, 6351 T4 has lower strength compared to the T6 temper. It shows similar properties to 6061-T4 and significantly lower strength than 6082-T651. Compared to 7075-T6, its strength is considerably lower. However, it offers higher ductility and better formability, making it advantageous for forming operations.

In terms of machinability, bendability, and weldability, 6351 T4 provides a well-balanced performance. Its machinability is adequate but not as high as free-machining alloys like 6262. Its weldability is good and it can be easily joined using MIG and TIG welding methods. Its bending capability is quite good in the T4 temper, making it suitable for forming processes. Compared to 6063, it is more difficult to form, but it offers better formability than 6082.

Regarding coating ability, vibration behavior, and applications, 6351 alloy is suitable for anodizing and surface coating processes, although its decorative anodizing quality is not as high as 6063. Its vibration damping capacity is moderate. Main application areas include pipe and profile production, pressure vessels, automotive components, and various engineering applications. 6351 T4 is a balanced alloy especially preferred for forming and extrusion processes.

Choosing Factors for 6351 T4

• Rod / Round Bar / Flat Bar
• Tube / Profile