
<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             SEP-30-1997
<CASH>                                          49,664                  80,760
<SECURITIES>                                       881                   2,978
<RECEIVABLES>                                  172,071                 122,557
<ALLOWANCES>                                     1,179                   2,489
<INVENTORY>                                    101,920                 111,942
<CURRENT-ASSETS>                               365,287                 373,488
<PP&E>                                         451,360                 628,104
<DEPRECIATION>                                 126,465                 210,881
<TOTAL-ASSETS>                                 797,613                 882,867
<CURRENT-LIABILITIES>                          328,502                 549,000
<BONDS>                                              0                       0
<PREFERRED-MANDATORY>                                0                       0
<PREFERRED>                                          0                       0
<COMMON>                                            46                      46
<OTHER-SE>                                      38,514                  78,674
<TOTAL-LIABILITY-AND-EQUITY>                   797,613                 882,867
<SALES>                                      1,171,001               1,043,620
<TOTAL-REVENUES>                             1,171,001               1,043,620
<CGS>                                        1,022,078                 900,788
<TOTAL-COSTS>                                1,099,633                 980,633
<OTHER-EXPENSES>                                28,356                  28,984
<LOSS-PROVISION>                                     0                       0
<INTEREST-EXPENSE>                              22,245                  27,400
<INCOME-PRETAX>                                 43,012                  34,003
<INCOME-TAX>                                     7,876                   3,531
<INCOME-CONTINUING>                             34,188                  22,903
<DISCONTINUED>                                       0                       0
<EXTRAORDINARY>                                      0                       0
<CHANGES>                                            0                       0
<NET-INCOME>                                    34,188                  22,903
<EPS-PRIMARY>                                     0.38                     .23
<EPS-DILUTED>                                     0.38                     .23
        

</TABLE>
