Compare Aluminium Window Profile Alloys: 6063 vs 6061 and the Best Choice for Hot Climates like Delhi

Introduction: Why Alloy Choice Matters in Hot Indian Cities

Delhi’s summers are harsh, often reaching 45°C and above, which means windows must withstand heat, pollution, and dust while maintaining appearance and durability.

At Alutown, we believe the choice of aluminium alloy plays a major role in your window’s performance — affecting strength, heat resistance, and surface finish.

Understanding the Common Aluminium Alloys

Here’s a quick comparison of the most widely used alloys in the window fabrication industry:

Property	Alloy 6063 (Architectural Alloy)	Alloy 6061 (Structural Alloy)	Alloy 6082 (Balanced Alloy)
Strength	Medium – suitable for residential use	High – ideal for industrial structures	Medium-High – suitable for wide frames
Surface Finish	Excellent (smooth, aesthetic)	Average (rougher extrusion)	Good (can be polished well)
Corrosion Resistance	Very High	High	Very High
Thermal Conductivity	Lower (reduces heat transfer)	Higher (transfers more heat indoors)	Moderate
Workability (Extrusion)	Excellent – easily shaped into slim designs	Moderate – less flexible	Good – slightly tougher
Weight	Lightweight	Slightly heavier	Moderate
Cost	Economical	Slightly costlier	Costlier
Best Suited For	Residential windows, doors, partitions	Heavy-duty / industrial structures	Commercial & premium large windows
Finishing Options	Anodizing, powder coating, wood texture	Limited powder coating finish	Anodizing, powder coating
Performance in Hot Climate	Excellent	Fair – transfers heat indoors	Good – but not commonly used

The Winner: Alloy 6063 for Indian Homes

After comparing all three alloys, Alloy 6063-T5/T6 clearly stands out as the best choice for residential aluminium windows, especially in Delhi NCR’s hot and dry climate.

Why Alutown Recommends 6063:

• Excellent thermal stability – reduces heat gain indoors.

• Superior corrosion resistance – perfect for pollution and humidity.

• Sleek design flexibility – allows for slim, modern window profiles.

• Long-lasting finish – perfect for powder coating and anodizing.

• Lightweight yet strong – ensures easy installation and durability.

Conclusion: The Right Alloy for the Right Climate

For residential aluminium windows in Delhi, Alloy 6063 is the most reliable and energy-efficient choice.At Alutown, we exclusively use 6063-T6 alloys to fabricate windows and doors that combine strength, beauty, and heat resistance — ensuring your home stays cooler, quieter, and maintenance-free through Delhi’s toughest summers.