Exhibit 99.3



                           EXCHANGE AGENT AGREEMENT

        This EXCHANGE AGENT AGREEMENT (this "AGREEMENT") dated as of  
February 2, 1999 between Armco Inc., an Ohio corporation ("ARMCO"), and Star 
Bank, N.A.

                            W I T N E S S E T H:

        WHEREAS, Armco is offering to exchange (the "EXCHANGE OFFER") all of 
its outstanding 8 7/8% Senior Notes due 2008 (the "OLD NOTES"), of which an 
aggregate of $75,000,000 in principal amount are outstanding as of the date 
hereof, for an equal principal amount of newly issued 8 7/8% Senior Notes due 
2008 (the "NEW NOTES"), on the terms and in the manner set forth in the 
Prospectus, dated February 5, 1999 (the "EXCHANGE OFFER PROSPECTUS"); and 

        WHEREAS, Armco wishes to appoint the Exchange Agent as its agent for 
the purpose of administering the Exchange Offer, and the Exchange Agent 
wishes to accept such appointment.

        NOW, THEREFORE, in consideration of the premises and mutual covenants 
contained herein, the parties agree as follows:

        1.  APPOINTMENT OF EXCHANGE AGENT; PERFORMANCE OF DUTIES.  Armco 
hereby appoints the Exchange Agent as its agent for the exchange of its Old 
Notes for its New Notes, and the Exchange Agent accepts such appointment 
subject to the terms and conditions contained in this Agreement.

        2.  DOCUMENTS.  The Exchange Agent shall establish an account with 
respect to the Old Notes at The Depository Trust Company ("DTC") for purposes 
of the Exchange Offer within two business days after the date of the Exchange 
Offer Prospectus so that any Participant (as defined herein) may make 
book-entry delivery of the Old Notes by causing DTC to transfer such Old 
Notes into such account in accordance with DTC's procedures for such 
transfer.  Armco shall provide the Exchange Agent with copies of a letter of 
transmittal substantially in the form of Exhibit A attached hereto (the 
"LETTER OF TRANSMITTAL").  The Exchange Agent shall request from DTC no later 
than the effective date of the Exchange Offer a Special Security Position 
Listing of all  participants eligible to participate in the Exchange Offer 
(the "PARTICIPANTS") and the amount of Old Notes owned of record by each such 
Participant; PROVIDED, HOWEVER, that the Exchange Agent shall not be 
responsible for any changes in the Participants or of the beneficial 
ownership of the Old Notes during the Exchange Offer.  The Exchange Agent 
shall make copies of the Letter of Transmittal available to Holders (as such 
term is defined in the Letter of Transmittal) and the Participants upon 
requests directed to Star Bank, N.A., Corporate Trust, 425 Walnut Street, 
Mail Location 5155, Cincinnati, Ohio 45202 by registered or certified mail or 
by overnight courier.


                                     


        3.  EXCHANGE AGENT RESPONSIBILITIES.  The Exchange Agent shall 
examine the Letters of Transmittal (or a facsimile thereof) and other 
documents received by it or ascertain that (a) each Letter of Transmittal is 
completed and duly executed in accordance with the instructions therefor and 
(b) any other document required by the instructions accompanying the Letters 
of Transmittal is completed and duly executed in accordance with such 
instructions.  Except as otherwise provided in this Paragraph 3, Old Notes 
shall not be deemed to be properly tendered unless all of the foregoing 
requirements are met prior to the Expiration Date (as defined in the Exchange 
Offer Prospectus).  The Exchange Agent shall take all steps as it shall deem 
reasonable and appropriate to cause the person tendering Old Notes pursuant 
to the Exchange Offer to correct any defect that exists in any Letter of 
Transmittal or accompanying document.  In the event that the Exchange Agent 
is unable to cause the correction of any such defect, the Exchange Agent 
shall promptly send to Armco any Letter of Transmittal or other document or 
copies thereof containing any defect therein, which in its judgment would 
prevent acceptance thereof, together with a request for instructions as to 
actions to be taken with respect thereto in accordance with Paragraph 8(f) of 
this Agreement.  All questions with respect to the duties of the Exchange 
Agent under this Paragraph 3 will be determined by Armco, which determination 
shall be final and binding for the purposes of this Agreement.  Armco 
reserves the right, if it so elects in its discretion, to waive the failure 
of any delivery of Old Notes, Letters of Transmittal or other document 
pursuant to the Exchange Offer to comply with any requirement of this 
Paragraph 3 or the Letter of Transmittal.  Armco reserves the right to 
terminate or, prior to the Expiration Date, amend the Exchange Offer as 
provided in the Exchange Offer Prospectus.  If notified by Armco of  
termination of the Exchange Offer, the Exchange Agent shall promptly return 
all tendered Old Notes to the tendering Holders.  If notified by Armco of an 
amendment of the Exchange Offer, the Exchange Agent shall follow the 
reasonable instruction of Armco contained in such notice to the extent 
consistent with this Agreement.  Each day upon which the Exchange Agent 
receives one or more Letters of Transmittal, the Exchange Agent shall provide 
Armco with a written account of the following information:  (1) the number of 
properly tendered Old Notes submitted that day; (2) the cumulative number of 
properly tendered Old Notes submitted and not properly withdrawn through such 
day; (3) the number of Old Notes covered by defective tenders submitted that 
day; (4) the number of Old Notes that are submitted that day pursuant to the 
guaranteed delivery procedures contained in the Letter of Transmittal; and 
(5) the cumulative number of Old Notes covered by uncorrected defective 
tenders as of such date.

        4.  ACCEPTANCES AND EXCHANGE.

            (a)  At any time after the Expiration Date (as defined in the 
Exchange Offer Prospectus), upon receiving a notice from Armco directing the 
exchange of properly tendered Old Notes, the Exchange Agent shall, as agent 
of Armco and subject to all the conditions of the Exchange Offer, accept for 
exchange all Old Notes properly tendered in accordance with this Agreement 
that are not properly withdrawn prior to the Expiration Date (as defined in 
the Exchange Offer Prospectus).  Thereafter, unless notified otherwise by 
Armco, the Exchange Agent shall continue to accept for exchange


                                     -2-


all Old Notes that are properly delivered to the Exchange Agent pursuant to 
Notices of Guaranteed Delivery (as defined in the Exchange Offer Prospectus) 
but shall not accept any other Old Notes for exchange.

            (b)  Following such acceptance of Old Notes, the Exchange Agent 
shall promptly present all such Old Notes to the registrar with instructions 
to cause such Old Notes to be marked as "canceled" in the name of Armco in 
the appropriate registers.  The Exchange Agent promptly shall notify Star 
Bank, N.A., as Registrar and Transfer Agent for the New Notes (in such 
capacity, the "REGISTRAR"), of (A) the names of the Holders on whose behalf 
Old Notes have been so presented and the number of Old Notes so presented on 
behalf of each and (B) the instructions for delivery of New Notes provided in 
the Letters of Transmittal submitted by each such Holder.  The Exchange Agent 
shall from time to time  request the Registrar to issue such New Notes as are 
required for delivery hereunder.

        5.  ASSIGNEES; SIGNATURES.  If a New Note or beneficial ownership 
thereof is to be delivered to, or reflected on the records of DTC as 
belonging to, an assignee of the Holder or beneficial owner of the 
surrendered Old Notes, the assignee of the Holder or the beneficial owner 
shall pay to the Exchange Agent the amount of any transfer taxes applicable 
to such transfer unless satisfactory evidence of the payment of such tax, or 
exception therefrom, is submitted.

        The signature (or signatures, in the case of any Old Notes owned by 
two or more joint holders) on a Letter of Transmittal must correspond exactly 
with the name(s) appearing on the records of the Registrar.

        6.  RECORDS.  The Exchange Agent shall maintain, on a continuing 
basis, in addition to the information required by Paragraphs 3 and 4 hereof, 
a record showing the following:  (i) the names and addresses of all Holders 
who have tendered Old Notes for exchange and of all Holders to whom New Notes 
will be or have been issued or to whose DTC account New Notes will be or have 
been credited, (ii) the face amount of Old Notes held by each such Holder, 
and (iii) the face amount of Old Notes tendered by and New Notes to be issued 
to each such Holder.  Upon the request of Armco, the Exchange Agent shall 
provide Armco with a report setting forth the information maintained pursuant 
to this Paragraph 6, together with such other information as may from time to 
time be reasonably requested.

        7.  FEES.  Armco shall pay all reasonable out-of-pocket expenses of 
the Exchange Agent for postage, stationery, printing, telephone, facsimile, 
telex and other similar items (other than those specifically described below) 
and the reasonable fees and disbursements of legal counsel to the Exchange 
Agent incurred in rendering services hereunder at cost, pursuant to monthly 
invoices from the Exchange Agent.  In no case, however, unless agreed to in 
advance by Armco, shall the payment of Armco of the fees and disbursements of 
legal counsel to the Exchange Agent exceed the sum of $2,500.  In addition, 
Armco shall pay such fees as Armco and the Exchange Agent may agree in 
writing from time to time.


                                     -3-


        8.  LIMITATION OF DUTIES.  As Exchange Agent hereunder, the Exchange 
Agent:

            (a)  shall have no duties or obligations other than those 
specifically set forth herein;

            (b)  will be regarded as making no representations and having no 
responsibilities as to the validity, sufficiency, value or genuineness of any 
Old Notes or New Notes or any Letter of Transmittal or other document 
deposited with or delivered to the Exchange Agent hereunder or any signature 
or endorsement in connection therewith and will not be required to and will 
not make any representation as to their validity, value or genuineness;

            (c)  shall not be obligated to take any legal action hereunder 
that might in the judgment of the Exchange Agent involve any expense or 
liability unless the Exchange Agent shall have been furnished with indemnity 
acceptable to it;

            (d)  may rely on and shall be protected in acting upon any 
certificate, instrument, opinion, notice, letter, telegram or other document 
or security delivered to the Exchange Agent without gross negligence, bad 
faith or without misconduct to be genuine and to have been signed by the 
proper party or parties;

            (e)  shall not be liable for any action taken or omitted by the 
Exchange Agent, or any action suffered by it to be taken or omitted, without 
gross negligence, bad faith or willful misconduct on its part, by reason of 
or as a result of the administration of its duties hereunder, and it may rely 
on and shall be protected in acting upon the written instructions of any 
person reasonably believed by it to be a proper officer or representative of 
Armco relating to the Exchange Agent's duties hereunder;

            (f)  may apply to Armco for written instructions with respect to 
any matter arising in connection with the Exchange Agent's duties and 
obligations arising under this Agreement, and the application by the Exchange 
Agent for written instructions from Armco may, at the option of the Exchange 
Agent, set forth in writing any action proposed to be taken or omitted by the 
Exchange Agent with respect to its duties or obligations under this Agreement 
and the date or dates on or after which such  action shall be taken, and the 
Exchange Agent shall not be liable for any action taken or omitted in 
accordance with a proposal included in any such application on or after the 
date specified therein (which date shall not, without Armco's consent, be 
less than five business days after Armco is deemed to have received such 
application) unless, prior to taking or omitting any such action, the 
Exchange Agent has received written instructions from Armco in response to 
such application specifying the action to be taken or omitted.  The right 
conferred by this Paragraph 8(f) shall be restricted by the requirement of 
Paragraph 3 hereof that, with respect to defects in any Letter of Transmittal 
or accompanying document, the Exchange Agent shall take such steps as it 
shall deem reasonable and appropriate to correct the same before applying to 
Armco under this Paragraph 8(f) for instructions; and 


                                     -4-


            (g) may consult counsel satisfactory to the Exchange Agent and 
Armco, and the opinion of such counsel shall be full and complete 
authorization and protection in respect of any action taken, suffered or 
omitted by it hereunder in good faith and in accordance with the opinion of 
such counsel.

        9.  COURT ORDERS.  If any property subject hereto is at any time 
attached, garnished or levied upon under any court order or in case the 
payment, assignment, transfer, conveyance or delivery of any such property 
shall be stayed or enjoined by any court order, or in case any order, 
judgment or decree shall be made or entered by any court affecting such 
property or any part thereof, then and in any such event the Exchange Agent 
is authorized, in its sole discretion, to rely upon and comply with any such 
order, writ, judgment or decree  that it is advised by legal counsel of its 
own choosing is binding upon them, and, if it complies with any such order, 
writ, judgment or decree, it shall not be liable to any of the parties hereto 
or to any other person, firm or corporation by reason of such compliance even 
through such order, writ, judgment or decree may be subsequently reversed, 
modified, annulled, set aside or vacated.

        10. INDEMNIFICATION.  Armco agrees to indemnify the Exchange Agent 
and hold it harmless from and against any loss, liability or expense 
(including reasonable counsel fees and expenses) incurred by the Exchange 
Agent without gross negligence, bad faith or willful misconduct on its part 
arising out of or in connection with the administration of its duties and any 
action taken or omitted to be taken hereunder and otherwise in connection 
with the Exchange Offer and against any stock transfer or other tax.

        11. AMENDMENTS.  This Agreement may be amended only by an instrument 
in writing executed by the parties hereto or their successors and assigns.

        12. REPORTS; NOTICES.  All reports, notices, applications (including 
applications for instructions in accordance with Paragraph 8(f) hereof) and 
other communications required or permitted hereunder shall be in writing and 
shall be deemed given when addressed and delivered by facsimile transmission 
(confirmed by telephone call), which delivery may be followed by delivery by 
hand or overnight delivery service, to the address for the party set forth 
below or at such other address as a party may furnish by like notice to the 
other parties hereto:

        If to Armco:

        Armco Corporation
        One Oxford Centre
        301 Grant Street
        Pittsburgh, PA  15219-1415
        Attn:  Corporate Secretary
        Facsimile Number:  (412) 255-9805


                                     -5-


        with a copy to:

        Arnold & Porter
        399 Park Avenue 
        New York, NY  10022
        Attn:  Jonathan C. Stapleton, Esq.
        Facsimile Number:  (212) 715-1399

        If to the Exchange Agent:

        Star Bank, N.A.
        Corporate Trust
        425 Walnut Street
        Mail Location 5155
        Cincinnati, OH  45202
        Attn:  Robert Jones
        Facsimile Number:  (513) 632-5511

        Delivery of a notice sent by facsimile transmission shall be deemed 
to be effective 24 hours after delivery has been confirmed by telephone.

        13. COUNTERPARTS.  This Agreement may be executed in counterparts, 
each of which shall be deemed to be an original but both of which together 
shall constitute but one agreement.

        14. TERMINATION.  This Agreement shall terminate on April 2, 1999, or 
on such earlier date as may be agreed in a signed writing between Armco and 
the Exchange Agent.  Upon termination, copies of all information maintained 
by the Exchange Agent for Armco under this Agreement shall be delivered to 
Armco as soon as practicable following Armco's request for such information.  
The right of the Exchange Agent to be reimbursed for out-of-pocket expenses 
as provided in Paragraph 7 and the indemnification provisions of Paragraph 10 
hereof shall survive termination of this Agreement.

        15. GOVERNING LAW.  This Agreement shall be governed by and construed 
in accordance with the laws of the State of New York


                                     -6-


        IN WITNESS WHEREOF, Armco Inc. and Star Bank, N.A. have duly executed 
this Agreement as of the date first set forth above.


                                         ARMCO INC.



                                         By:
                                            -------------------------------
                                            Name:
                                            Title:




                                         STAR BANK, N.A.



                                         By:
                                            -------------------------------
                                            Name:
                                            Title: