<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE JUNE
30,2000, CONSOLIDATED STATEMENT OF INCOME AND CONSOLIDATED BALANCE SHEET AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000

<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-2000
<PERIOD-START>                             JAN-01-2000
<PERIOD-END>                               JUN-30-2000
<CASH>                                          28,712
<SECURITIES>                                         0
<RECEIVABLES>                                  281,352
<ALLOWANCES>                                         0
<INVENTORY>                                    280,655
<CURRENT-ASSETS>                               626,209
<PP&E>                                       1,251,593
<DEPRECIATION>                                 477,989
<TOTAL-ASSETS>                               1,588,665
<CURRENT-LIABILITIES>                          250,202
<BONDS>                                        409,761
                                0
                                          0
<COMMON>                                         6,088
<OTHER-SE>                                     782,192
<TOTAL-LIABILITY-AND-EQUITY>                 1,588,665
<SALES>                                      1,025,978
<TOTAL-REVENUES>                             1,025,978
<CGS>                                          804,360
<TOTAL-COSTS>                                  804,360
<OTHER-EXPENSES>                                   724
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                              12,106
<INCOME-PRETAX>                                104,793
<INCOME-TAX>                                    39,800
<INCOME-CONTINUING>                             64,993
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    64,993
<EPS-BASIC>                                       1.22
<EPS-DILUTED>                                     1.21


</TABLE>



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