A
A Coatings
See
Galvanneal Coatings.
A. G. C.
System
(Automatic Gauge Control) Hydraulic or electric system that supplies the
force to the A.G.C. roll force cylinders.
Acetyl
Tributyl Citrate
One of the lubricating oils generally applied on tin Mill Products (tin
plate, TFS-chrome/chrome oxide coated steel, and blackplate).
Actual
Weight
Also the scale weight. The customer buys by the actual (scale) weight
of the steel. The theoretical weight is used in estimating, however,
it is not to be used for billing.
Age
Hardening
A process of aging that increases hardness and strength and ordinarily
decreases ductility. Age hardening usually follows rapid cooling or
cold working. Takes effect on all cold rolled sheets in storage except
fully aluminum killed.
Aging
A change in the properties of certain metal and alloys (such as steel)
that occurs at ambient or moderately elevated temperatures after a hot
working heat treatment or cold working operation. Typical properties
impacted are: hardness, yield strength, tensile strength, ductility,
impact value, formability, magnetic properties, etc. See also Non-aging.
AISI
See American Iron and Steel Institute.
Alkyd
A type of resin made from a polyhydroxy alcohol combined chemically with
the acids of various oils. They are particularly adapted for use where
hardness and high gloss are required. Used largely for outside
decoration.
Aluminum
Killed Steel (Special Killed)
Steel deoxidized with aluminum in order to reduce the oxygen content to
a minimum so that no reaction occurs between carbon and oxygen during
solidification.
American
Iron and Steel Institute (AISI)
A
non-profit association of North American producers, suppliers to and
users of steel. It's mission is to promote steel as the material of
choice and to enhance the competitiveness of its members and the North
American steel industry.
Anneal
A process, consisting of heating to and holding at a suitable
temperature followed by cooling at a suitable rate, used primarily to
soften metallic materials, such as steel. This process also
simultaneously produces desired changes in microstructure, as in other
properties, such as improvement of mechanical or electrical properties,
increase in stability in dimensions, facilitation of cold work, etc.
Also see Continuous Anneal and Batch Anneal.
Annealing
1. Heating and then cooling metals in a controlled
atmosphere to soften them. 2. A process involving
heating and cooling usually applied to induce softening. In box
annealing, the material to be annealed is enclosed in a metal container
with, or without packing material to minimize oxidation. The charge is
usually heated slowly to a temperature just below the transformation
range, but sometimes just above, or within it, and cooled slowly.
Anodes
Tin bars that are put in the plater cells and are important to the
plating process in the Tin Mill.
ASTM
American Standard of Testing and Materials. A non-profit organization
that provides a forum for producers, users, ultimate consumers, and
those having a general interest (representatives of government and
academia) to meet on common ground and write standards for materials,
products, systems, and services.
ASTM
Standards
A series of documents, approved and published by ASTM, that include
specifications or requirements, practices, guides, test methods, etc.,
covering various materials, products, systems or services. In the steel
industry, the steel related ASTM standards are used by both the
producers and users to ensure that a steel product or service meets all
intended requirements. See American Society for Testing and Materials.
ATBC
See Acetyl Tributyl Citrate.
Atmosphere Valve
A valve that is located in the exhaust line of a turbine and is designed
to open up and get a positive pressure in the exhaust line.
Atomizing Steam
Low pressure steam which is introduced to the oil gun to help atomize
the oil, to assist the burning process, and to keep the oil gun from
plugging.
Attemperator
Header connecting the primary and finishing superheaters into which feed
water is sprayed to control the final temperature of the steam leaving
the boiler.
Automatic
Describes the status of the operation when the
O2
pulpit has control and the boiler logic
has control.
Auxiliary Air
A controller for auxiliary air dampers on #146 and #147 boilers. For
proper combustion on oil fire.
Auxiliary Hydraulic System
Hydraulic system that supplies the force to run the various hydraulic
cylinders associated with the finishing mill which are not taken care of
by the A.G.C. or C.V.C. Hydraulic systems.
Auxiliary Oil Pump
A steam or electric pump that maintains oil pressure on the controls and
the bearings of a turbo blower when it is not up to maximum speed.
Auxiliary Pump
Pump on the auxiliary system which supplies the pressure for the system.
AW -
100
The hydraulic oil used in all the hydraulic systems located in the
finishing mill oil cellar and the furnace hydraulic system.
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