<TABLE> <S> <C>

<PAGE>
 
<ARTICLE> 5
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<S>                             <C>                     <C>                     <C>
<PERIOD-TYPE>                   3-MOS                   6-MOS                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1996             DEC-31-1996            DEC-31-1996
<PERIOD-START>                             JAN-01-1996             JAN-01-1996            JAN-01-1996
<PERIOD-END>                               MAR-31-1996             JUN-30-1996            SEP-30-1996
<CASH>                                             131                     156                    106
<SECURITIES>                                         0                       0                      0
<RECEIVABLES>                                      355                     358                    348
<ALLOWANCES>                                        20                      20                     20
<INVENTORY>                                        995                     930                    950
<CURRENT-ASSETS>                                    11                    1433                   1393  
<PP&E>                                            7086                    7144                   7147
<DEPRECIATION>                                    4397                    4456                   4477
<TOTAL-ASSETS>                                    5618                    5574                   5515
<CURRENT-LIABILITIES>                              971                     948                    930
<BONDS>                                            521                     520                    500
<PREFERRED-MANDATORY>                                0                       0                      0
<PREFERRED>                                         14                      14                     14
<COMMON>                                           113                     113                    114
<OTHER-SE>                                        1102                    1123                   1126
<TOTAL-LIABILITY-AND-EQUITY>                      5618                    5574                   5515
<SALES>                                           1119                    2355                   3530
<TOTAL-REVENUES>                                  1119                    2355                   3530
<CGS>                                             1010                    2103                   3146
<TOTAL-COSTS>                                     1106                    2298                   3448
<OTHER-EXPENSES>                                     0                       0                      0
<LOSS-PROVISION>                                     0                       0                      0
<INTEREST-EXPENSE>                                  14                      28                     41
<INCOME-PRETAX>                                      0                      32                     45
<INCOME-TAX>                                         0                       5                      8
<INCOME-CONTINUING>                                  0                      27                     37
<DISCONTINUED>                                       0                       0                      0
<EXTRAORDINARY>                                      0                       0                      0
<CHANGES>                                            0                       0                      0
<NET-INCOME>                                         0                      27                      6
<EPS-PRIMARY>                                    (.09)                     .05                   0.06
<EPS-DILUTED>                                    (.09)                     .05                   0.06
        

</TABLE>