<ARTICLE> 5
<RESTATED>
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-END>                               MAR-31-1997
<CASH>                                          31,363
<SECURITIES>                                         0
<RECEIVABLES>                                   85,979
<ALLOWANCES>                                     1,499
<INVENTORY>                                     77,577
<CURRENT-ASSETS>                               201,749
<PP&E>                                         589,182
<DEPRECIATION>                                 268,471
<TOTAL-ASSETS>                                 551,971
<CURRENT-LIABILITIES>                           97,033
<BONDS>                                         79,063
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                         4,406
<OTHER-SE>                                     306,008
<TOTAL-LIABILITY-AND-EQUITY>                   551,971
<SALES>                                        233,253
<TOTAL-REVENUES>                               234,852
<CGS>                                          208,215
<TOTAL-COSTS>                                  208,215
<OTHER-EXPENSES>                                11,747
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                               1,570
<INCOME-PRETAX>                                  9,575
<INCOME-TAX>                                     3,444
<INCOME-CONTINUING>                              6,131
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     6,131
<EPS-PRIMARY>                                     0.23<F1>
<EPS-DILUTED>                                     0.23<F1>
<FN>
<F1>Earnings per share have been restated to comply with SFAS No. 128
</FN>