As-continuously cast beam blank and method for casting...

Details As-continuously cast beam blank and method for casting... As-continuously cast beam blank and method for casting...

B - Operations, Transporting

22

D

B22D 11/00 (2006.01) E04C 3/06 (2006.01)

Patent

CA 2055607

An as-continuously cast beam blank (10) is described including a web portion (12) and a plurality of opposed flange prec- ursor portions (14, 16, 18, 20) extending from opposite ends of the web portion (12), the web portion (12) having an average thick- ness of no greater than about 3 inches, each of said flange precursor portions ( 14, 16, 18, 20) having an average thickness of no greater than about 3 inches, wherein the ratio of the average thickness of the flange precursor portions (14, 16, 18, 20) to the aver- age thickness of the web portion (12) preferably is between about .5:1 to about 2:1, The resulting beam blank (10) has a crystal grain structure of fine ferrite and pearlite, substantially free of acicular ferrite and grain boundary ferrite films.

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