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Tailored Blanks
A section of sheet or strip that is cut-to-length and trimmed to match
specifications for the manufacturer's stamping design for a particular
part. Because excess steel is cut away (to save shipping costs), all
that remains for the stamper is to impart the three-dimensional shape
with a die press (see Blanking).
Tandem Mill
A type of cold-rolling mill, the tandem mill imparts greater strength,
a uniform and smoother surface, and reduced thickness to the steel
sheet. Unlike the original single-stand mills, a tandem mill rolls
steel through a series of rolls (generally three to five in a row) to
achieve a desired thickness and surface quality.
Teeming
Pouring; ingot molds are filled (teemed) by iron-bearing ladles.
Temper Mill
A type of cold-rolling mill, usually with only one or two stands, that
finishes cold-rolled, annealed sheet steel by improving the finish or
texture to develop the required final mechanical properties. By
changing the rolls of the temper mill, steel can be shipped with a
shiny, dull or grooved surface.
Terne
Sheet steel coated with a mixture of lead and tin. Terne principally
is used in the manufacture of gasoline tanks, although it also can be
found in chemical containers, oil filters and television chassis.
Tin Mill
Continuous tin-plating facility to produce tin mill steel sheet to be
used in food and beverage cans and other containers.
Tin/Chrome Plating
A plating process whereby the molecules from the positively charged
tin or chromium anode attach to the negatively charged sheet steel.
The thickness of the coating is readily controlled through regulation
of the voltage and speed of the sheet through the plating area. |
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Tin-Free Steel
Chromium-coated steel. Because it is used in food cans just like tin
plate, it ironically is classified as a tin mill product. Tin-free
steel is easier to recycle because tin will contaminate scrap steel in
even small concentrations.
Tin Plate
Thin sheet steel with a very thin coating of metallic tin. Tin plate
is used primarily in canmaking.
Tolerances
A customer's specifications can refer to dimensions or to the chemical
properties of steel ordered. The tolerance measures the allowable
difference in product specifications between what a customer orders
and what the steel company delivers. There is no standard tolerance
because each customer maintains its own variance objective. Tolerances
are given as the specification, plus or minus an error factor; the
smaller the range, the higher the cost.
Toll Processing
The act of processing steel for a fee ("toll"). Owners of the steel
sheet may not possess the facilities to perform needed operations on
the material (or may not have the open capacity). Therefore, another
steel mill or service center will slit, roll, coat, anneal, or plate
the metal for a fee.
Trade Case
A type of lawsuit filed by United States companies against their
foreign counterparts in response to imports at prices lower than those
in the U.S. market. Sanctions can be imposed by the International
Trade Commission and the Commerce Department on foreign producers
involved in dumping and government subsidization, if domestic
manufacturers can prove material damage to their results.
Tundish
The shallow refractory-lined basin on top of the continuous caster. It
receives the liquid steel from the ladle, prior to the cast, allowing
the operator to precisely regulate the flow of metal into the mold.
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