ACRYLUME Data

U.S. Steel Coated Sheet Products

ACRYLUME® Steel Sheet Data Sheet

Product Description

USS ACRYLUME® steel sheet is a zinc-aluminum coated steel sheet product that combines the excellent corrosion resistance of a GALVALUME® steel sheet coating with a clear organic polymer surface treatment that is applied over the GALVALUME® steel sheet coating. The surface treatment is essentially invisible but it provides excellent characteristics to enhance the performance and applicability of unpainted GALVALUME® steel sheet.

These enhancements include:

• Good roll formability without the need for oils.
• Excellent transit and field-storage performance without darkening or staining.
• The practical eliminations of fingerprinting and footmarking during installation.
• Long term surface brightness when exposed to the environment to help retain heat reflectivity.

Production & Availability

ACRYLUME® steel sheet is produced by applying the organic polymer film directly over the zinc-aluminum coating of the GALVALUME® steel sheet using roll-coating equipment. Following application of such liquid film treatment, the strip is dried in an oven to provide a clear, dry acrylic coating on the surface of the GALVALUME® steel sheet. The coating is clear and flexible, and is approximately 1.0 micrometer thick. Also, it provides lubricity that improves the roll-forming characteristics.

The use of roll-coating equipment to produce ACRYLUME® steel sheet provides a uniformity to the surface treatment that is not available by other less complex means of application. Our facilities at the Mon Valley and Fairfield Works have state-of-the-art equipment to provide complete coverage of both sheet surfaces with a clear, uniformly thick acrylic coating.

ACRYLUME® steel sheet is available in all the sizes and grades currently being produced at both the Mon Valley and Fairfield GALVALUME® steel sheet coating lines.

Performance

ACRYLUME® steel sheet has been processed on a number of different roll-forming lines with complete success. The roll-formed profiles included difficult standing-seam types. It is not necessary to add oils to either the strip or the forming rolls.

The performance with respect to the jobsite storage, hand marking and non-uniform darkening has been equally impressive.

ACRYLUME® steel sheet will exhibit the same spangle variations normal to GALVALUME® steel sheet. Roofing panels may therefore exhibit color variation.

Corrosion Performance

The results of accelerated corrosion tests show the superiority of ACRYLUME® steel sheets when compared with today's conventional chemically treated GALVALUME® steel sheets.

Wet-Stack Test

• Designed to simulate storage of sheets in either a coil form or as a stacked bundle at the jobsite.
• Test samples stacked tightly in a bundle. Wetted between the individual panels every 2 days with deionized water.
• Tested at 100°F for 750 hours.

Hours in Test	Acrylume® Steel Sheets	CT11	CT21
250	Light haze	Light surface spots	Dark black spots and edges
500	Light haze	Light surface patches	Heavy black patches
750	Light haze	Uniform surface darkening	Heavy, dark black patches

Water Immersion Test

• Designed to simulate ponding of water on a low slope roof.
• Samples immersed in deionized water.
• Water temperature – 100°F
• Test duration – 2,000 hours

Hours in Test	Acrylume® Steel Sheets	CT11	CT21
500	Slight dulling	Initial dark spots	Dark patches
1000	White patches with dark spots	Dark & light stains	Completely blackened
2000	White surface ,dark edges	Dark stains	Completely blackened

Salt Spray Test

• Tested per ASTM B117
• 5% salt solution
• 30-day test duration.

Hours in Test	Acrylume® Steel Sheets	CT11	CT21
250	No Activity	White haze with black spots	White haze with small small black spots
500	Tiny spots, evidence of initial activity	White haze with black streaks	White haze with small black streaks
720	Small spots with local light streaks	Light haze with dark spots	Dark haze with dark spots

UNITED STATES STEEL
600 Grant Street
Pittsburgh, PA

1 -- CT1 and CT2 represent two different widely used chemical treatments.

USS® is a registered trademark of United States Steel
ACRYLUME® is a registered trademark of United States Steel
GALVALUME® is a registered trademark of BIEC International, Inc. and some of its licensed producers