Reliance Steel & Aluminum Co. Acquires Lampros Steel, Inc


Los Angeles, CA - December 3, 2010 - Reliance Steel & Aluminum Co. (NYSE:RS) announced
today that it has acquired the outstanding capital stock of Lampros Steel, Inc. and a related interest in Lampros
Steel Plate Distribution LLC. Lampros Steel, Inc. is a steel service center company specializing in structural
steel shapes with a facility located in Portland, Oregon. Lampros Steel Plate Distribution LLC owns a 50%
interest in a partnership, LSI Plate, that is a distributor of carbon steel plate with locations in California and
Oregon.

Lampros Steel, Inc. was founded in 1983 by Milt and Marcus Lampros and the partnership was founded
in 1999. The combined revenues of Lampros Steel, Inc. and LSI Plate for the year ended December 31, 2009
were $29 million. Lampros will operate as a subsidiary of American Metals Corporation, a wholly-owned
subsidiary of Reliance Steel & Aluminum Co. Current management will remain in place with Milt Lampros
serving as President of Lampros Steel, Inc.

"We look forward to the addition of Lampros Steel as a part of Reliance. Lampros has a strong
reputation for customer service in the Pacific Northwest area and will complement our network of
facilities," said David H. Hannah, Chairman and CEO of Reliance.

Reliance Steel & Aluminum Co., headquartered in Los Angeles, California, is the largest
metals service center company in North America. Through a network of more than 200 locations in
38 states and Belgium, Canada, China, Malaysia, Mexico, Singapore, South Korea, and the United
Kingdom, the Company provides value-added metals processing services and distributes a full line
of over 100,000 metal products to more than 125,000 customers in a broad range of industries.

Reliance Steel & Aluminum Co.'s press releases and additional information are available
on the Company's web site at www.rsac.com. The Company was named to the 2010 "Fortune 500"
List, the 2009 Forbes "America's Best Managed Companies" List, the 2010 Fortune List of "The
World's Most Admired Companies," and the 2009 Forbes "Platinum 400 List of America's Best Big
Companies."

CONTACT:
Kim P. Feazle
Investor Relations
(713) 610-9937
(213) 576-2428
kfeazle@rsac.com
investor@rsac.com

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