Not only does J73A UP possess the great benefits of specialty aluminum as a construction material – lightweight, strong, easily formable – but this product also has a uniform anodizing layer of 20 µm​ ideal for outdoor use. There are no contact points along edges that can be left after batch aluminum coil anodizing, making further processing simpler. Its resistance to the elements means colors stay vibrant without fading.

One of the greatest architectural challenges is to design large-dimensional structures. J73A UP anodized aluminum coil can be used for a number of applications and is appropriate for aluminum facades and aluminum roofing of public buildings of more than 20 meters in height. Key properties of our anodized aluminum coil include:

• Decorative with permanent metallic gloss
• Firm bond with the metal surface, so no peeling, chipping or corrosion
• Non-flammable per 96/603/EC and non-combustible per DIN 4102
• Durable and easy to maintain
• Non-toxic (hot-water sealing)
• Electrically insulated
• Highly recyclable

Novelis J73A UP aluminum coil stock is corrosion-resistant over a pH value of approximately 5.5 to 8. Results of corrosion tests confirm the excellent resistance of the anodized surface, even if the material has been bent first.

We ensure that the anodic layer thickness has a minimum value (20 µm​) over the entire length and width of the material’s top side, which exceeds the requirements of international standards. The reverse side can be thinner according to the continuous aluminum coil anodizing process.

The sealing quality has a significant influence on the corrosion resistance of anodized aluminum and is tested using the loss of mass test to DIN ISO 3210. Thanks to this excellent sealing quality, Novelis achieves a nominally better result than the standard. The anodic layer cannot peel off, and filiform corrosion is not possible due to the firm bond that exists with the base material.