How Aluminum Billets Are Made: The Foundation of High-Quality Aluminum Profiles

When it comes to aluminum extrusion, the quality of the final profile starts long before the extrusion press. It begins with the aluminum billet — the core raw material that determines strength, surface finish, and overall performance.

At New Daming Aluminum, we take this foundation seriously. With our own in-house billet casting workshop, we ensure full control over quality from the very first step.

What Is an Aluminum Billet?

An aluminum billet is a solid cylindrical bar of aluminum alloy, specifically produced for extrusion. These billets are later heated and pushed through dies to create various aluminum profiles used in construction, industry, and furniture applications.

The consistency and purity of the billet directly affect the final product — making billet production a critical stage in the entire process.

How Aluminum Billets Are Produced

The billet manufacturing process involves several key steps:

• 1. Raw Material Selection & Melting
  High-quality aluminum ingots, combined with carefully controlled alloying elements, are melted in advanced furnaces. Precise composition control ensures the billet meets required mechanical and chemical standards.
• 2. Alloy Adjustment
  Elements such as magnesium, silicon, or copper are added depending on the desired alloy (e.g., 6061, 6063). This step defines the strength, resistencia a la corrosión, and workability of the final aluminum profiles.
• 3. Degassing & Purification
  To ensure internal quality, impurities and gases (such as hydrogen) are removed through refining processes. This minimizes defects like porosity and improves structural integrity.
• 4. Casting
  The molten aluminum is cast into cylindrical billets using advanced casting technology. Uniform cooling is essential to maintain a consistent grain structure throughout the billet.
• 5. Homogenization
  Billets are heat-treated to eliminate internal stress and ensure even distribution of alloying elements. This step significantly improves extrusion performance and surface quality.

Our Advantage: In-House Billet Casting

At New Daming Aluminum, we operate our own billet casting workshop, allowing us to control every detail of the process.

We can supply aluminum billets with diameters ranging from Ø90 mm to Ø320 mm, meeting diverse extrusion requirements — from standard architectural profiles to large industrial sections.

Key Benefits:

• Stable Quality Control from raw material to finished profile
• Flexible Production for different alloy grades and specifications
• Improved Lead Time with integrated manufacturing
• Enhanced Performance in extrusion consistency and surface finish

Why Billet Quality Matters

Many issues in aluminum profiles — such as surface defects, inconsistent strength, or poor anodizing results — can often be traced back to billet quality.

By controlling billet production in-house, New Daming ensures:

• Better surface finish after anodizing or powder coating
• Higher mechanical strength and durability
• Reduced extrusion defects and waste

Conclusion

In aluminum extrusion, excellence starts at the source. A high-quality billet is not just a raw material — it is the backbone of superior aluminum profiles.

With advanced casting capabilities and strict quality control, New Daming Aluminum delivers reliable billet solutions that support consistent, high-performance extrusion results.

Looking for a reliable aluminum profile manufacturer with in-house billet casting?
Contact New Daming Aluminum today to learn more about our integrated production capabilities.