<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, 1999 and is qualified in its entirety be 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-31-1999
<PERIOD-START>                             JAN-01-1999
<PERIOD-END>                               JUN-30-1999
<CASH>                                          53,600
<SECURITIES>                                    39,100
<RECEIVABLES>                                  200,300
<ALLOWANCES>                                         0
<INVENTORY>                                    208,800
<CURRENT-ASSETS>                               523,100
<PP&E>                                       1,585,800
<DEPRECIATION>                             (1,123,100)
<TOTAL-ASSETS>                               1,055,400
<CURRENT-LIABILITIES>                          264,600
<BONDS>                                        229,800
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                        45,300
<OTHER-SE>                                     288,000
<TOTAL-LIABILITY-AND-EQUITY>                 1,055,400
<SALES>                                        619,600
<TOTAL-REVENUES>                               619,600
<CGS>                                          534,200
<TOTAL-COSTS>                                  534,200
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                               7,900
<INCOME-PRETAX>                                  7,300
<INCOME-TAX>                                     2,900
<INCOME-CONTINUING>                              4,400
<DISCONTINUED>                                   4,400
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     8,800
<EPS-BASIC>                                       0.19
<EPS-DILUTED>                                     0.19