0000950123-97-003615 DEF 14A 1 19970521 19970429 NONE STEEL DYNAMICS INC 0001022671 3312 351929476 IN 1231 DEF 14A 34 000-21719 97589755 4500 COUNTY RD 59 BUTLER IN 46721 2198688000 4500 COUNTY RD 59 BUTLER IN 46721 DEF 14A 1 000095012397003615-001-seq1-def-14a.txt DEFINITIVE PROXY MATERIAL