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A

A Coatings
See Galvanneal Coatings.

'A' Elevation
The top level of the boiler firebox where four oil guns are located.  The oil guns are used to produce steam and maintain pressure while the boiler is on oil fire.

A, B, C Valves
Automatic steam regulator valves on the junction header.
(Also called boiler steam pressure control valves).

A. G. C. Cylinders - (Automatic Gauge Control)
Large hydraulic cylinders used to apply corrective force to the back-up rolls in order to maintain an even gauge on the strip steel being rolled.

A. G. C. Pressure
The three hydraulic pressures that the A.G.C. system supplies: They are P1 - 4100 psi, P2 - 850 psi, and P3 130 psi.

A. G. C. System
(Automatic Gauge Control) Hydraulic or electric system that supplies the force to the A.G.C. roll force cylinders.

AC
One of the two types of electricity.  It stands for alternating current.  In alternating current, the current periodically changes direction and magnitude in the circuit.

Accumulator Bladder
A neoprene bag that holds the nitrogen in a gas charged accumulator.

Accumulator
A device used to dampen pressure pulsations in the hydraulic and morgoil systems.

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.

Actuators
The self contained hydraulic systems that run the heat covers over the finishing mill steel segments that are bolted to the reel mandrel to increase their diameter so that large (24" ID) coils can be run.

Adapters
Steel segments that are bolted to the reel mandrel to increase their diameter so that large (24" ID) coils can be run.

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.

Agitator
A device used in the mix tanks to help dissolve the chemicals.

Air Ejector Pump
A pump that sends river water to oil coolers and air ejectors, and serves as an emergency feed to #8 air ejector.

Air Ejector
A system that creates a vacuum in the exhaust line with the aid of condensing steam.

Air Heaters
Bank of boiler tubes located in the exhaust gas ductwork which preheats the incoming combustion air by transferring heat from the exhaust gases passing through them to the incoming air passing around them.  Preheating the air reduces boiler fuel requirements.

Air-ways
Air passages that regulate combustion air to the oil guns.

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.

Amphenol
A type of electrical connector (male or female plug) used to connect a device to power sources and or an input signal source.

Amps
Unit of measurement of current.

Anneal Cycle Code
Steel heat specification unique to the annealing base being charged.

Anneal Cycle No.
Heating requirements for the metallurgical specifications.

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.

Apron
Device that the molten slag flows across on its way from the spout to the doughnut.   It is cooled by water spray.

APTV
Accumulator Pressure Testing Valve.  A device used to measure the amount of nitrogen in a gas charged accumulator. 

Ash Box
Brick lined collection point for slag and ash.  #1 and #2 H.P. Boilers share a common ash box.  #3 and #4 H.P. Boilers each have a separate collection box.

Ash Tank
Holding tank for ashes.  The tank is located outside the boiler house.  The ashes are dumped once or twice a week, depending on the ash accumulation.

Askania
1. A strip-centering device consisting of two electric eyes to ensure that the strip will stay centered during re-coiling.   2. Device with an electronic eye which is associated with tracking of strip going through the side trimmers.

Askania Control
The name of the oil control that is used on #5 Turbo Blower.

Askania Pumps
One steam and one electric pump used for the controls on #5 Turbo Blower.

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.