<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE JUNE 30,
1998 CONSOLIDATED STATEMENT OF INCOME AND CONSOLIDATED BALANCE SHEET AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-START>                             JAN-01-1998
<PERIOD-END>                               JUN-30-1998
<CASH>                                          14,761
<SECURITIES>                                         0
<RECEIVABLES>                                  235,595
<ALLOWANCES>                                         0
<INVENTORY>                                    217,865
<CURRENT-ASSETS>                               509,836
<PP&E>                                       1,091,546
<DEPRECIATION>                               (376,159)
<TOTAL-ASSETS>                               1,430,722
<CURRENT-LIABILITIES>                          237,898
<BONDS>                                        364,245
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                         5,905
<OTHER-SE>                                     668,010
<TOTAL-LIABILITY-AND-EQUITY>                 1,430,722
<SALES>                                        922,086
<TOTAL-REVENUES>                               922,086
<CGS>                                          725,969
<TOTAL-COSTS>                                  725,969
<OTHER-EXPENSES>                                 (942)
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                              10,867
<INCOME-PRETAX>                                 85,210
<INCOME-TAX>                                    33,100
<INCOME-CONTINUING>                             52,110
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    52,110
<EPS-PRIMARY>                                      .98
<EPS-DILUTED>                                      .97