Feb 6 (Reuters) - Metals processor Reliance Steel & Aluminum Co will buy Metals USA Holdings Corp for $766 million.

The $20.65 per share cash offer represents a 13 percent premium to Metals USA's Tuesday close of $18.30 on the New York stock Exchange.

Metals USA, which had 37.1 million shares outstanding as of Nov. 1, is 53 percent owned by Apollo Global Management LLC .

The enterprise value of the deal was about $1.2 billion, the companies said.

(Reporting by Swetha Gopinath in Bangalore; Editing by Saumyadeb Chakrabarty) Keywords: METALSUSAHOLDINGS OFFER/

(swetha.gopinath@thomsonreuters.com)(within U.S. +1 646 223 8780, outside U.S. +91 80 4135 5800)(Reuters Messaging: swetha.gopinath.thomsonreuters.com@reuters.net)

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