
<TABLE> <S> <C>

<ARTICLE> 5
<MULTIPLIER> 1,000
       
<S>                             <C>                     <C>
<PERIOD-TYPE>                   YEAR                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1996             DEC-31-1997
<PERIOD-START>                             JAN-01-1996             JAN-01-1997
<PERIOD-END>                               DEC-31-1996             JUN-30-1997
<CASH>                                          49,664                  60,493
<SECURITIES>                                       881                   3,794
<RECEIVABLES>                                  172,071                 192,229
<ALLOWANCES>                                     1,179                   1,979
<INVENTORY>                                    101,920                 117,096
<CURRENT-ASSETS>                               365,287                 414,315
<PP&E>                                         451,360                 545,661
<DEPRECIATION>                                 126,465                 149,868
<TOTAL-ASSETS>                                 797,613                 933,657
<CURRENT-LIABILITIES>                          328,502                 420,776
<BONDS>                                              0                       0
<PREFERRED-MANDATORY>                                0                       0
<PREFERRED>                                          0                       0
<COMMON>                                            46                      46
<OTHER-SE>                                      38,514                  45,502
<TOTAL-LIABILITY-AND-EQUITY>                   797,613                 933,637
<SALES>                                      1,171,001                 663,489
<TOTAL-REVENUES>                             1,171,001                 663,489
<CGS>                                        1,022,078                 586,541
<TOTAL-COSTS>                                1,022,078                 586,541
<OTHER-EXPENSES>                               103,911                  68,523
<LOSS-PROVISION>                                     0                       0
<INTEREST-EXPENSE>                              22,245                  16,355
<INCOME-PRETAX>                                 43,012                   8,425
<INCOME-TAX>                                    10,776                   5,389
<INCOME-CONTINUING>                             31,288                   1,178
<DISCONTINUED>                                       0                       0
<EXTRAORDINARY>                                      0                       0
<CHANGES>                                            0                       0
<NET-INCOME>                                    31,288                   1,178
<EPS-PRIMARY>                                     0.38                    0.01
<EPS-DILUTED>                                     0.38                    0.01
        

</TABLE>
