EXHIBIT 24

                        POWER OF ATTORNEY


     KNOW ALL PERSONS BY THESE PRESENTS, that each of the
undersigned Directors of Aluminum Company of America (the
"Company") hereby constitutes and appoints ROBERT G. WENNEMER,
EARNEST J. EDWARDS and DENIS A. DEMBLOWSKI, or any of them, his
or her true and lawful attorneys and agents to do any and all
acts and things and execute any and all instruments which said
attorneys and agents, or any of them, may deem necessary or
advisable or may be required to enable the Company to comply
with the Securities Exchange Act of 1933, as amended, and any
rules, regulations or requirements of the Securities and
Exchange Commission in respect thereof, in connection with the
registration under said Act of shares of common stock of the
Company to be issued and distributed pursuant to the Long Term
Stock Incentive Plan of the Company or any successor plan,
including specifically, but without limiting the generality of
the foregoing, power and authority to sign the name of each of
the undersigned Directors of the Company in the capacity of
Director thereof to any registration statement to be filed with
the Securities Exchange Commission in respect of said Plan or
successor plan and shares of common stock, or either of them, to
any and all pre-effective amendments, post-effective amendments
and supplements to any such registration statement, and to any
instruments or documents filed as part of or in connection with
any such registration statement or pre-effective amendments or
post-effective amendments or supplements thereto; and the
undersigned hereby ratifies and confirms all that said attorneys
and agents, or any of them, shall do or cause to be done by
virtue hereof.

     IN WITNESS WHEREOF, the undersigned have subscribed these
presents on the date set opposite their names below.



/s/ Kenneth W. Dam    5/8/97    /s/ Sir Arvi Parbo      5/8/97
Kenneth W. Dam                  Sir Arvi Parbo


/s/ Joseph T. Gorman  5/8/97    /s/ Henry B. Schacht    5/8/97
Joseph T. Gorman                Henry B. Schacht


/s/ Judith M. Gueron  5/8/97    /s/ Forrest N. Shumway  5/8/97
Judith M. Gueron                Forrest N. Shumway


/s/ Sir Ronald Hampel 5/8/97    /s/ Franklin A. Thomas  5/8/97
Sir Ronald Hampel               Franklin A. Thomas


/s/ John P. Mulroney  5/8/97    /s/ Marina v.N. Whitman 5/8/97
John P. Mulroney                Marina v.N. Whitman