<ARTICLE> 5
<LEGEND>       THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION 
               EXTRACTED FROM THE ARMCO INC. CONSOLIDATED BALANCE SHEETS,
               CONSOLIDATED STATEMENTS OF INCOME AND RELATED INTERIM
               FINANCIAL STATEMENTS AND IS QUALIFIED IN ITS ENTIRETY BY 
               REFERENCE TO SUCH FINANCIAL STATEMENTS. 
<RESTATED>
<CIK>          0000007383
<NAME>         ARMCO INC
<MULTIPLIER>   1,000
<CURRENCY>     U.S. DOLLAR
       
                                                         
<PERIOD-TYPE>                 12-MOS       9-MOS        6-MOS        3-MOS      
<FISCAL-YEAR-END>             DEC-31-1997  DEC-31-1997  DEC-31-1997  DEC-31-1997 
<PERIOD-START>                JAN-01-1997  JAN-01-1997  JAN-01-1997  JAN-01-1997 
<PERIOD-END>                  DEC-31-1997  SEP-30-1997  JUN-30-1997  MAR-31-1997 
<EXCHANGE-RATE>                         1            1            1            1
<CASH>                            189,900      279,900      175,200      151,900
<SECURITIES>                        5,000            0            0            0
<RECEIVABLES>                     147,000      225,200      191,600      183,000
<ALLOWANCES>                        4,000            0            0            0
<INVENTORY>                       268,000      264,600      265,000      262,700
<CURRENT-ASSETS>                  637,400      776,800      637,700      603,600
<PP&E>                          1,305,500    1,292,400    1,284,100    1,278,300
<DEPRECIATION>                    653,000      640,500      627,400      612,600
<TOTAL-ASSETS>                  1,881,300    2,034,800    1,907,700    1,886,300
<CURRENT-LIABILITIES>             386,300      470,900      371,300      371,600
<BONDS>                           306,900      353,900      337,000      341,200
<PREFERRED-MANDATORY>                   0            0            0            0
<PREFERRED>                       185,900      185,900      185,900      185,900
<COMMON>                            1,100        1,100        1,100        1,100
<OTHER-SE>                       (339,500)    (355,800)    (377,300)    (394,000)
<TOTAL-LIABILITY-AND-EQUITY>    1,881,300    2,034,800    1,907,700    1,886,300
<SALES>                         1,829,300    1,392,900      931,600      441,300
<TOTAL-REVENUES>                1,829,300    1,392,900      931,600      441,300
<CGS>                           1,623,900    1,236,500      833,600      397,500
<TOTAL-COSTS>                   1,623,900    1,236,500      833,600      397,500
<OTHER-EXPENSES>                        0            0            0            0
<LOSS-PROVISION>                        0            0            0            0
<INTEREST-EXPENSE>                 35,500       26,700       17,200        8,700
<INCOME-PRETAX>                    79,400       61,100       30,900        9,600
<INCOME-TAX>                        2,300        1,800        1,300          200
<INCOME-CONTINUING>                77,100       59,300       29,600        9,400
<DISCONTINUED>                      2,700        1,300        1,300            0
<EXTRAORDINARY>                    (3,000)      (3,000)           0            0
<CHANGES>                               0            0            0            0
<NET-INCOME>                       76,800       57,600       30,900        9,400
<EPS-PRIMARY>                        0.55         0.41         0.21         0.05
<EPS-DILUTED>                        0.55         0.41         0.21         0.05