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COR-TEN AZPTM Prepainted Galvalume® Steel Sheet
COR-TEN AZPTM is a superior alternative to COR-TEN® and other weathering steels in architectural roofing and siding applications.
COR-TEN AZPTM vs. COR-TEN® Steel
| COR-TEN AZPTM | COR-TEN® |
| Prepainted Galvalume® | Unprotected bare steel sheet surface |
| Color matched to aged COR-TEN | Great in thick applications such as bridges and primary structural framing |
| Warranted corrosion protection | Weathering, acid rain, abrasion, debris eats through thin gauge sheet |
| Cool roof pigmentation |
COR-TEN® is a registered trademark
of United States Steel Corporation and can only be used for products produced by
United States Steel Corporation or its licensees.
COR-TEN AZPTM is a trademark of United States Steel Corporation
Galvalume® is a registered trademark of BIEC International Inc.
COR-TEN AZPTM Steel Sheet
| = | Warranted corrosion protection |
| - Prepainted Galvalume® 25-year anti-perforation | |
| - PVDF Paint chalk, peel and fade | |
| = | Improved Solar Reflectivity |
| = | No unsightly storm-water runoff staining |
| = | COR-TEN AZPTM is a superior alternative to COR-TEN® and other weathering steels in architectural roofing and siding applications. |
| = | High recycled content and total recyclability |
Relative Cool Roof Properties
| COR-TEN AZPTM | Aged COR-TEN® | |
| Solar Reflectivity* | .282 | .087 |
| Thermal Emissivity* | .855 | .890 |
*Test Results per Oak Ridge National Laboratories
Why Not COR-TEN® in Architectural Applications?
Consistent with United States Steel Corporation's ("USS") policy over the last two decades, USS reiterates and reminds that COR-TEN® steel sheet products should not be sold when the intended use is for an architectural application, such as roofing and siding. USS has consistently maintained this position because of the risk of corrosion from factors beyond the control of the COR-TEN® steel licensee (e.g. improper design, fabrication, erection and/or maintenance).
Reasons
- The tight oxide skin of COR-TEN® Steel reforms after abrasion from snow, ice, sand, dirt and hail.
- Acid rain also causes the skin to reform.
- As the skin reforms the product actually becomes thinner and eventually will be perforated.
Application
- Special attention must be paid to the drainage of storm water to prevent staining of surrounding structures, sidewalks, and other surfaces.
- COR-TEN® Steel must be kept free from debris such as leaves, pine needles, etc. These waste products retard the wet/dry cycle necessary for COR-TEN® Steel and corrosion is accelerated.
Energy Efficiency
- Although COR-TEN® Steel is totally recyclable and has a high recycled content, it has very low solar reflectivity
- In other words, COR-TEN® Steel is a HOT ROOF, inconsistent with environmental “cool roof” programs that aim to minimize energy consumption, urban heat islands and pollution.
COR-TEN® Steel Alternatives
- COR-TEN AZP Prepainted Galvalume® duplicates the color of aged COR-TEN®.
- Prepainted Galvalume® provides warranted protection against perforation for 25 years.
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