pa1778data.pdf

U.S. STEEL DUQUESNE WORKS
HAER No. PA-115
(Page 184)
intermediate transfer table and cradle; a draw furnace of the
same dimensions as the heating and holding furnace; a draw-
holding furnace of the same dimensions as above; and a run-out
table with cradle.
Installation date: 1962.
I. Ajax Mangnethermic Induction Line: Manufactured by Ajax
Inc., the mangnethermic induction line was also used to harden
and temper bars. Laid out on a straight line from north to
south, the equipment making up the line consists of a load table;
a motor-driven chain conveyor which transfers bars from the load
table to a roller type in-feed conveyor line which is located
just west of the load table; four electric heating coils; a ring
type spray quenching facility complete with guide rollers for
holding the product to be heated and quenched; and a roller type
discharge table onto which are attached cradles from which the
finished bars are picked up and transferred to the finishing and
testing equipment by an E.O.T. crane.
Installation date: 1962.
J. Finishing and Testing Equipment: Located within the heat
treatment plant building are a number of pieces of equipment used
for finishing and testing bars. These include gag presses, bar
straighteners, hack saws, abrasive cut-off machines, bar turners,
centerless grinders, hardness testers, and a 25-ton scale. The
following gives the general location and manufacturer (when
possible) of the equipment within the building:
1. Gag Presses: There are a total of two hydraulic gag
presses in the building. Laid out on a north-south axis, gag
press No. 1 is located 59' west of the continuous electric heat
treating line's tempering furnaces. Gag press No. 2, also laid
out on a north-south axis, is located approximately 45' south of
the continuous gas fired heat treating line. Both presses
consist of an entry table, a gag press station, and a delivery
table. Each gag press is approximately 100' long.
Installation dates: 1943 and 1962.
2. Bar Straighteners: The building contains four two roll
bar straighteners manufactured by Medart Inc. Bar straightener
No. 1 is located 20* east of gag press No. 1 and is laid out on a
north-south axis. Bar straightener No. 2, also laid out on a
north-south axis is located 20* east of bar straightener no. 1.
Bar straightener no. 3 is located 56' from the western wall of
the transfer bay and is laid out on a north-south axis. Bar
Straightener no. 4, laid out on a south-north axis, is located
82■ from the eastern wall of the production bays in the southern
end of the building. Each straightener is approximately 85' long
and consists of an entry table, two roll station, and a delivery