Tenaris 4Q 04 Conference Call Invitation

    Business Editors

    LUXEMBOURG--(BUSINESS WIRE)--Feb. 7, 2005--Tenaris, S.A. (NYSE:TS) (BCBA:TS) (BMV:TS) (BI:TEN)

MARK YOUR CALENDAR

Dear Financial Community Member:

On behalf of Tenaris, S.A. we would like to invite you to participate in a conference call to discuss the Company's Fourth Quarter and 2004 Results.

Representing Tenaris will be Carlos Condorelli, Chief Financial Officer, German Cura, Commercial Director, and Nigel Worsnop, Investor Relations Director.

Following a brief summary, the conference call will be opened to questions.

WHEN: Thursday, February 24, 2005

TIME: 10:00 a.m. (Eastern Time)

DIAL IN #: 866-800-8649

617-614-2703 (International Dial Number)

Please dial in 10 minutes before the scheduled start time.

ACCESS #: 14612845

A replay of the conference call will be made available from 12:00 pm on February 24th through midnight on March 3rd. To access the replay, please dial 888-286-8010 or 617-801-6888 and enter passcode "81872091" when prompted.

Sincerely,

Cesar Villavicencio Vice President Citigate Financial Intelligence 201-499-3516

--30--SG/sa*

CONTACT: Citigate Financial Intelligence for Tenaris, S.A. Cesar Villavicencio, 201-499-3516

KEYWORD: ARGENTINA JAPAN ITALY MEXICO VENEZUELA BRAZIL INTERNATIONAL CANADA LATIN AMERICA ASIA PACIFIC EUROPE INDUSTRY KEYWORD: MANUFACTURING MINING/METALS OIL/GAS ENERGY CONFERENCE CALLS SOURCE: Tenaris, S.A.

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