<ARTICLE> 5 <MULTIPLIER> 1,000 <PERIOD-TYPE> 9-MOS <FISCAL-YEAR-END> DEC-31-1996 <PERIOD-START> JAN-01-1997 <PERIOD-END> SEP-30-1997 <CASH> 10,269 <SECURITIES> 0 <RECEIVABLES> 67,956 <ALLOWANCES> 0 <INVENTORY> 49,750 <CURRENT-ASSETS> 142,323 <PP&E> 335,282 <DEPRECIATION> 148,426 <TOTAL-ASSETS> 415,236 <CURRENT-LIABILITIES> 73,057 <BONDS> 0 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 42,989 <OTHER-SE> 178,981 <TOTAL-LIABILITY-AND-EQUITY> 415,236 <SALES> 247,077 <TOTAL-REVENUES> 247,077 <CGS> 151,463 <TOTAL-COSTS> 214,887 <OTHER-EXPENSES> 1,042 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 2,939 <INCOME-PRETAX> 28,475 <INCOME-TAX> 10,451 <INCOME-CONTINUING> 18,120 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 18,120 <EPS-PRIMARY> .46 <EPS-DILUTED> .46