Due to a special etching structure, our J57S UP alloy offers more than the commercial-quality brilliance of standard AlMg1 aluminum. The alloy’s chemical composition is set within very narrow limits and in such a way that the anodized aluminum façade exhibits a striking metallic appearance.

Higher levels of manganese and copper in the composition compared to standard AlMg1 alloys, together with a sophisticated manufacturing process, provide the platform for optimum uniformity in color tone and gloss levels, even if mixing production lots.

The manufacturing process of J57S UP is tightly controlled. Strict checks are in place throughout operations:

• Ingot production – casting parameters and ingot pre-treatment
• Pre-heating and hot-rolling
• Cold rolling and intermediate annealing
• Dimensions and flatness to DIN EN 485-4
• Mechanical properties to DIN EN 485-2
• Surface check

Before each production batch leaves a Novelis plant, a trial anodizing process is carried out and assessed before being released for delivery, ensuring our customers always receive the highest-quality product possible.

Color is crucial in architecture, especially for aluminum facades. Contrast and matches to surrounding areas are major factors when developing projects. Novelis J57S UP provides a broad variety of UV-resistant colors from a light bronze tone to black. Gold and other colors are also available. Novelis batch anodized aluminum can be colored using either the electrolytic process with metal salt or the immersion process.

The chemical composition of J57S UP and the process parameters in the Novelis mill are particularly tuned to using a deoxidation process to remove acid sulphur, hydrogen peroxide or nitric more easily. It also prevents streaking and other effects caused by an incomplete pickling on the surface. The color and gloss consistency are unmatched.