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T
Tandem Mill
A cluster of rolling mills where mill stands are
in tandem. At WSC, this terminology generally refers to WSC’s cold
reducing mills.
Telescoping Coil
A coil that has not wound properly
whose sidewall protrudes out. Tension problems or a bad start on the
exit reel causes this condition.
Temper Code
Industry-standard code that
indicates the hardness of the steel.
Temper Mill
A relatively light cold rolling
operation that may be used on hot rolled, cold rolled and some coated
steel such as galvanized. Temper rolling hot rolled sheet helps to
improve flatness, minimize coil breaks and fluting and alter mechanical
properties. Temper rolling cold reduced and coated sheet steel improves
surface finish, alters mechanical properties and reduces the tendency of
the steel to flute during fabrication.
Temper Rolling
A cold-rolling process that
develops the proper stiffness temper in steel, improves flatness, and
imparts a desired surface finish.
Temper
A condition produced in a metal or
alloy by mechanical or thermal treatment and having characteristics
structure and mechanical properties. A given alloy may be in the fully
softened or annealed temper, or it may be cold worked to the hard
temper, or further to spring temper. Intermediate tempers produced by
cold working (rolling or drawing) are called "quarter-hard", "half-hard"
and "three quarters hard", and are determined by the amount of cold
reduction and the resulting tensile properties. In addition to the
annealed temper, conditions produced by thermal treatment are the
solution heat-treated temper and the heat-treated and artificially aged
temper. Other tempers involve a combination of mechanical and thermal
treatments and include that temper produced by cold working after heat
treating, and that produced by artificial aging of alloys that are
as-cast, as-extruded, as-forged and heat treated, and worked.
Tensile (Tension) Test
A destructive mechanical test
whereby strength and ductility properties are measured.
Tensile Strength
The greatest longitudinal stress
steel can sustain without breaking.
Tension Level
Stamco Leveler in #5 Galvinized
line – levels the steel.
TFS
See Tin Free Steel.
Three-Piece Can
Three-piece cans consist of a body
and two ends. The body side seam can be accomplished by soldering,
cementing or welding. The two ends are attached using a double-rolled
seam. The curl on the end, containing the seal compound and its flange
on the can body are indexed and rolled flat. The sealing compound
between fold gives an hermetic seal.
Tin Coated Steel
See Tin Plate.
Tin Free Steel (TFS)
1.
Single or double reduced
black plate having a thin coating of chromium and chromium oxide applied
electrolytically. Weirton’s trade name is Weirchrome and the coating
weight is 5 mg/sq. ft. or 0.000003 inches thick. 2. Carbon steel
that is coated with chromium rather than tin. Weirton’s trade name is
Weirchrome and the coating weight is 5 mg/sq. ft. or 0.000003 inches
thick.
Tin Mill Product
Tin Plate, TFS, or Black Plate.
Tin Mill
Facility at Weirton Steel
Corporation that produces black plate and electroplated zinc, chrome and
tin.
Tin Plate
Steel that is coated with
commercially pure tin.
Tolerance
The range of variation permitted
in maintaining a specific dimension or specification.
Tongs
1.
Long-handled pliers used to
remove scrap pieces from the welder or other sections of the line.
2. See ‘Heppenstall.’
Top Dross
Skimmings for the continuous
galvanize pot. Composition consists of approximately 87% zinc. 5%
aluminum, and 6% to 8% iron.
Torpedo Car
The hot metal car used to carry
molten iron from the blast furnace to steelmaking units.
Tribology
A science that deals with the
design, friction, wear and lubrication of interacting surfaces in
relative motion.
Triple Spot Test
See Minimum Triple Spot Average
Coating.
Tundish
The reservoir at the top of the
continuous caster into which molten steel is poured.
Type D
Base-metal steel, aluminum killed;
sometimes required to minimize severe fluting and stretcher strain
hazards for severe drawing applications.
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