<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
COMPANY'S BALANCE SHEET AND STATEMENT OF INCOME FOR THE SIX MONTHS ENDED
JUNE 30, 1997 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH
FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-START>                              JAN-1-1997
<PERIOD-END>                               JUN-30-1997
<CASH>                                          20,030
<SECURITIES>                                         0
<RECEIVABLES>                                  356,639
<ALLOWANCES>                                     5,573
<INVENTORY>                                    205,453
<CURRENT-ASSETS>                               593,724
<PP&E>                                       1,342,311
<DEPRECIATION>                                 492,519
<TOTAL-ASSETS>                               1,515,686
<CURRENT-LIABILITIES>                          268,056
<BONDS>                                        223,857
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                        78,730
<OTHER-SE>                                     699,117
<TOTAL-LIABILITY-AND-EQUITY>                 1,515,686
<SALES>                                        843,525
<TOTAL-REVENUES>                               843,983
<CGS>                                          696,823
<TOTAL-COSTS>                                  696,823
<OTHER-EXPENSES>                                49,182
<LOSS-PROVISION>                                   600
<INTEREST-EXPENSE>                               6,652
<INCOME-PRETAX>                                 90,726
<INCOME-TAX>                                    34,070
<INCOME-CONTINUING>                             56,656
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    56,656
<EPS-PRIMARY>                                      .71
<EPS-DILUTED>                                      .71