Corten steel or COR-TEN® steel?

Corten steel is a misusage of COR-TEN® trademark. COR-TEN® is a registrerad trademark of United States Steel Corporation and can only be used for products produced by United States Steel Corporation or its licensees. SSAB is a COR-TEN® licensee since 1976 and a proud producer of COR-TEN® branded material ever since. Common errors include Cor-Ten, CORTEN, COR TEN and Cortensteel.

Trademark use guidelines for COR-TEN®

To protect the rights of the trademark owner, these guidelines should be followed whenever the COR-TEN® brand is used. COR-TEN® should always be used as a separate trademark with the ® sign and be written in all capital letters, with a dash and without spaces.

The rules of good trademark usage given below shall be followed whenever the COR-TEN® brand is used in order that trademark rights may be maintained.


COR-TEN® shall always be used as a separate trademark and be written in all capital letters, with a dash and without spaces. There is no specific logotype for the brand and it shall not be typographed as such in copy text. Use the typography that you use for the rest of the copy text, headings etc.


Always use the the symbol ® for “registered trademark” and include a trademark ownership notice: “COR-TEN® is a trademark of United States Steel Corporation”.


Proper descriptive terms, such as “low alloy steel”, “weathering steel” or “steel composition” and not the trademark COR-TEN®, shall be used as generic term for the product type and shall be used to describe the product together with the COR-TEN® brand on all product references.


You may not use or register product names, company names, trademarks, trade names, domain names, social media accounts or profiles, other social media identifiers, or any other designation containing COR-TEN® or a term confusingly similar thereof.


Do you have questions on how to display or use the COR-TEN® brand, don’t hesitate contacting United States Steel Corporation or SSAB. SSAB are proud representatives of the brand and want the value of it to benefit you as user in the best way possible.

Common errors when reffering to COR-TEN® include Cor-Ten, CORTEN, COR TEN, corten steel and Cortensteel.
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COR-TEN® trademark usage
COR-TEN® steel

COR-TEN® Steel.
A natural beauty.

Long lasting attraction, year after year, with practically zero need for maintenance. Use COR-TEN® steel to make your mark as an architect, and let it contribute to sustainability at the same time. Genuine COR-TEN® steel is produced by SSAB under a license from US Steel Corporation.

Perforated COR-TEN® steel

Design guide

Naturally, you want to get the best aesthetics from COR-TEN® steel. When designing with COR-TEN® steel there are a few things to consider. Follow these simple rules and your architecture will leave a lasting impression.

COR-TEN® in architecture

COR-TEN® in architecture

Take a look at these inspiring examples to see how architects have used COR-TEN® in their projects.