What Is Aluminum 6063? Properties, Finish, and Applications

What Is Aluminum 6063?

Aluminum 6063 is a premium extrusion alloy supplied by GNEE, valued for its smooth surface finish, excellent corrosion resistance, and superior formability. It contains a higher percentage of pure aluminum and lower alloying content than 6061, which makes it easier to shape and finish.

This alloy is often referred to as an architectural aluminum due to its visual appeal and anodizing performance.

Specification of 6063 aluminum Plate

Chemical composition

Alloy	Si	Fe	Cu	Mn	Mg	Cr	Zn	Ti	Zr	Unit
6063	0.20-0.60	≦0.35	≦0.1	≦0.1	0.45-0.90	≦0.1	≦0.1	≦0.1	-	Wt%

Physical properties

Alloy

Temper

Tensile Strength

Rm (MPa)

Yield Strength

Rp0.2 (Mpa)

Elongation

A (%)

Exfoliation corrosion

Intergranular corrosion

Mg/cm²

Certification

Standard

6063

≥150

≥110

≥8

DNV,GL

EN573

≥205

≥170

≥10

Size

Alloy	Temper	Thickness (mm)	Width (mm)
6063	T5/T6	≦60	2000 or customized

6063 aluminum tube

Key insight:
6063 aluminum is softer and less strong than 6061, but far easier to form into complex profiles.

Surface Finish and Corrosion Resistance of 6063 Aluminum

6063 aluminum offers exceptional surface quality, especially after anodizing. Its higher aluminum purity allows for:

Brighter anodized colors

Smoother textures

Improved long-term appearance

It also demonstrates superior corrosion resistance, making it ideal for outdoor architectural use.

Extrusion and Workability of 6063 Aluminum

6063 aluminum excels in extrusion applications. It flows easily during forming, allowing manufacturers to create intricate shapes with consistent dimensions and minimal defects.

Because of this, 6063 is preferred when minimal post-machining and high aesthetic quality are required.