<ARTICLE> 5
<LEGEND>
This schedule contains summary financial information extracted from sec form
10-Q and is qualified in its entirety by reference to such financial statements.
</LEGEND>
<MULTIPLIER> 1000
       
                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1996
<PERIOD-END>                               JUN-30-1996
<CASH>                                          30,917
<SECURITIES>                                         0
<RECEIVABLES>                                  195,744
<ALLOWANCES>                                     1,800
<INVENTORY>                                    100,833
<CURRENT-ASSETS>                               406,145
<PP&E>                                       1,035,458
<DEPRECIATION>                                 333,671
<TOTAL-ASSETS>                               1,279,668
<CURRENT-LIABILITIES>                          227,734
<BONDS>                                        135,299
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                           414
<OTHER-SE>                                     729,722
<TOTAL-LIABILITY-AND-EQUITY>                 1,279,668
<SALES>                                        614,142
<TOTAL-REVENUES>                               614,142
<CGS>                                          443,987
<TOTAL-COSTS>                                  443,987
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                 494
<INCOME-PRETAX>                                114,121
<INCOME-TAX>                                    45,649
<INCOME-CONTINUING>                             86,112
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    86,112
<EPS-PRIMARY>                                     2.09
<EPS-DILUTED>                                     2.07