<ARTICLE> 5
<LEGEND>
This schedule contains summary financial information extracted from the
Financial Statements contained in Item 1 of Form 10-Q for the period ended 
June 30, 1997 and is qualified in its entirety by reference to such 
financial statements.  Figures are rounded to the nearest 100,000 (except EPS).
</LEGEND>
<MULTIPLIER> 1,000
       
                           
<PERIOD-TYPE>                 6-MOS
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-END>                               JUN-30-1997
<CASH>                                          22,000
<SECURITIES>                                    58,700
<RECEIVABLES>                                  413,500
<ALLOWANCES>                                         0
<INVENTORY>                                    341,300
<CURRENT-ASSETS>                               930,200
<PP&E>                                       2,217,600
<DEPRECIATION>                              (1,476,000)
<TOTAL-ASSETS>                               1,929,500
<CURRENT-LIABILITIES>                          472,000
<BONDS>                                        268,600
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                        50,300
<OTHER-SE>                                     864,700
<TOTAL-LIABILITY-AND-EQUITY>                 1,929,500
<SALES>                                      1,223,600
<TOTAL-REVENUES>                             1,223,600
<CGS>                                          941,500
<TOTAL-COSTS>                                  941,500
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                              14,500
<INCOME-PRETAX>                                122,700
<INCOME-TAX>                                    42,300
<INCOME-CONTINUING>                             80,400
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    80,400
<EPS-PRIMARY>                                     1.56
<EPS-DILUTED>                                     1.55