luminum extrusion is a metal forming process that pushes heated aluminum billets through a die to create continuous custom profiles. Not all aluminum alloys perform equally well in extrusion. The 6xxx (Al-Mg-Si) series is the dominant family for commercial extrusion, balancing extrudability, surface quality, mechanical strength, corrosion resistance and post-treatment capability. Other series can also be extruded but are limited to special use cases due to slower extrusion speed, higher die wear or poor surface qualityAluminum E....
Main Extrusion-Grade Aluminum Alloys
6063 – Best for General & Complex Extrusion
6063 is the benchmark extrusion alloy in the industry, with the highest extrudability among heat-treatable aluminum grades.
Features: Excellent flowability for thin-wall, intricate cross-sections; ultra-smooth raw surface; outstanding anodizing and powder coating performance; good corrosion resistance; moderate strength; fast extrusion speed and lower production cost.
Typical temper: T5 / T6
Applications: Architectural profiles (windows, doors, curtain walls), heat sinks, decorative trims, simple industrial frames, curtain rails, consumer housing profiles.
Best pick when aesthetic finish and complex shapes are priority.
6061 – Industrial Structural Workhorse
6061 is the most widely used structural extrusion alloy. It has higher mechanical strength than 6063, but extrudability is lower, requiring slower press speed and usually thicker wall design.
Features: Higher tensile & yield strength; great weldability and CNC machinability; good corrosion resistance; stable mechanical performance after T6 treatment.
Typical temper: T6
Applications: Machine frames, equipment enclosures, transport components, load-bearing brackets, aluminum tubes, custom structural parts.
Best pick for load-bearing components requiring machining and assembly.
6082 – Higher-Strength Structural Extrusion
6082 offers higher strength than 6061, widely used in Europe standard profiles. Its silicon content is higher, so extrusion difficulty increases further.
Features: Superior mechanical strength; good corrosion resistance; suitable for heavy-load structures.
Applications: Automotive parts, railway structural profiles, heavy-duty industrial frames, scaffolding, truck body componentsALFED.
6060 – Premium Thin-Wall & Decorative Grade
6060 has better extrudability and surface finish than 6063, with slightly lower strength.
Features: Extremely smooth surface, uniform anodizing effect, perfect for ultra-thin wall precision profiles.
Applications: High-end architectural decoration, slim electronic housing, precision decorative extrusion.
Other Series (Limited Extrusion Use)
1xxx Pure Aluminum (1050,1070)：Excellent extrudability and thermal conductivity, very low strength. Used for heat transfer parts, conductive profiles.
5xxx Al-Mg (5052,5754)：Non-heat-treatable; great corrosion & weldability, good for marine parts. Extrudability is fair, not for ultra-complex thin walls.
2xxx Al-Cu & 7xxx Al-Zn-Mg：Ultra-high strength, but hard to extrude, high die cost, poor corrosion resistance. Reserved for aerospace, high-performance auto parts only, not for mass general profilesALFED.
Key Factors to Select Extrusion Alloy
Profile complexity & wall thickness: Complex thin wall → 6063 / 6060; simple thick structural section → 6061 /6082
Mechanical load: Light load & decoration:6063; medium/heavy load:6061/6082
Surface requirement: Anodizing / powder coating: prioritize 6063 /6060
Post-processing: CNC machining, welding: 6061
Cost & lead time: 6063 has the best cost efficiency for mass production
Conclusion
For most custom extrusion orders, 6063 is the first choice for decorative, thin-wall and complex profiles; 6061-T6 is the standard for structural industrial profiles. 6082 is selected when higher strength is required. The final alloy selection must balance geometry, strength, surface finish, post-processing and budget together.
