B
BA
See Batch Anneal
Band
Refers to metal strap Signode band that is one half inch wide. This band
is used to thread and pull the strip through the line.
Bare
Spot
A location on the strip where coating did not adhere.
Base Box
Unit of area of 112 sheets of tin mil products (tin plate, tin free
steel or black plate) 14 by 20 inches, or 31,360 square inches.
Tin Plate is sold, and carried in finished inventory, on a weight per
unit area rather than on a thickness basis.
Base
Metal Contamination
Dirt or other impurities in the steel strip.
Base
Type
Type of base used for cooling; i.e., water or fan. The North Anneal uses
water-cooled.
Base Weight
Tin Mill term; Thickness divided
by .00011. Also weight in pounds of one Base Box of Tin plate. In
finished inventory base weight is specified instead of decimal
thickness.
Basic
Oxygen Furnace (BOF)
See Basic Oxygen Process.
Basic
Oxygen Furnace (B.O.F.)
A furnace that refines a charge of molten iron and scrap into steel. The
B.O.F., as it is called, blows pure oxygen into the charge, creating a
vigorous chemical reaction to refine the metal. Also see Basic
Oxygen Process.
Basic
Oxygen Process (BOP)
A process in which molten
steel is produced in a furnace by blowing oxygen into molten iron, scrap
and flux materials. The furnace is known as Basic Oxygen Furnace (BOF).
Basis
Weight
See Base Weight.
Batch
Anneal
The process by which a large,
stationary stack of steel coils (4 coils high) is subjected to a long
heat-treating cycle. This process enables the cold-rolled sheet to fully
recrystallize into the softest possible product conforming to customer
specifications. Controlling the recrystallization process makes a
fine-grained microstructure easy to obtain, and minimizes the tendencies
for retention of directional properties of the rolled steel which could
produce undesirable shapes in the stamping of a cylindrical part such as
a can. Also see Anneal and Continuous Anneal.
Bend Tests
Various tests used to assess the ductility of steel when subjected to
bending. Tests may include determination of the minimum radius or
diameter required to make a satisfactory bend and the number of repeated
bends that the material can withstand without failure when it is bent
through a given angle and over a definite radius.
Bi-Coil
Also BY-COIL. Tin Mill term. Customers buy "by coil" or
"bi-coil" rather than cut sheets.
Black
Iron
Uncoated steel product.
Black Plate
1. Any steel that has not been coated – usually has gone through
Tandem mill (cold-rolled). Also defines a product, uncoated material in
tin plate gauges. 2. 128 lb. (.0141 in) and lighter tin
mill product which has not received any additional metallic coating
during production. 3. A low carbon cold reduced steel
intended for use in the uncoated state or for coating with tin and
chromium.
Blast
Furnace
1. A furnace in which solid
fuel (limestone, coke, iron ore) is combined with high-pressure, hot air
blast (120,000 psi) to smelt ore in a continuous process (They are never
stopped. They can be slowed down or idled). A Blast Furnace in the iron
and steel industry is used to produce liquid iron.
Bleeding
A coating defect consisting of the migration of an ingredient to the
surface of a coating, or a migration, which stains in an adjacent area.
The term blooming is also a form of bleeding – usually associated with
lubricants rather than pigments.
Blister
1. Coating defect
consisting of the formation of bubbles in a coating, which appear as
hemispherical elevations. The blisters are hollow, and are usually
caused by entrapped air or solvent. 2. A raised spot on the
surface on the surface of metal due to expansion of gas which causes a
subsurface metal separation such as inclusions and small laminations.
Block
Off
1. Wooden separators which are used at both the bottom of a lift
and between IPM’s (bundles) of a lift. 2. The act of placing 4x4s
between the lifts in the piler’s box.
Blocking
A coating defect consisting of the
adhesion of two adjoining coatings or materials. Usually this term
refers to the coating on one side of coated plate being tacky or sticky
and adhering to the adjacent sheet.
Bloom
A coating defect consisting of the migration of an ingredient, in the
coating, to the surface of the cured film. Usually blooming refers to
waxes or lubricants, which rise to the surface and cause a hazy
appearance.
Blow
Back
A coating defect consisting of a lower coating film weight on the bottom
of the coated sheet caused by high velocity air in the oven. Blow back
usually occurs with high solids coatings which have little solvent to
evaporate and "set" the film.
Blush
A coating defect consisting of the
whitening of a cured film which results in a translucent or opaque
appearance with accompanying loss of gloss. Blushing usually occurs
during the pasteurization or steam processing of films which are
undercured or water sensitive.
Bonderizing
Treating cold rolled or galvanized steel surfaces with phosphate to
improve paint-adherence.
Bonderized Coating
A thin film of phosphate pretreatment applied to a steel surface (bare
or zinc coated) to enhance paintability.
Box
Annealing
A process of annealing a ferrous
alloy in a suitable closed metal container, with or without packing
material, in order to minimize oxidation. The charge is usually heated
slowly to a temperature below the transformation range, but sometimes
above or within it, and is then cooled slowly.
Brake Press
Bending
An operation which produces various degree bends when fabricating parts
from steel.
Breakage
Cracks or separation of the steel.
Breaker
Uncoiler rolls through which the strip passes; composed of a mandrel and
leveling rolls which unwind the strip prior to processing through the
Pickler. Breaker rolls assist in breaking up the Hot Mill surface scale.
Bridle Unit
A three-roll cluster used to control line tension at strategic locations
on the line.
Brite
1. Regular galvanize coating (not minimized spangle or JP). 2. Rolls
that have no grit; smooth finish on surface of steel. No. 9 Tandem only
runs brite rolls.
Brittle
Inter-metallic Layer
An iron-zinc alloy layer formed between the steel substrate and the free
zinc of galvanized coatings.
Bruise
A mark transferred to the strip surface from a defective process roll.
Similar to dent or punchmark.
BSO
See Butyl Stearate.
Build
Up Coil
A coil made by putting together two or more coils to make one max coil
or one shippable coil.
Bundle
Specific number of sheets which
equals 1 unit of production. Number is determined by multiplying
sheets/Packages/BUNDLE. For example, an order calls for 112
sheets/package. According to the maximum height allowed for a lift.
Therefore, multiplying 15 packages X 112 sheets = 1680 sheets/bundle.
Burnt
Rubber
Small or large black spots that generally show up on surface and are
generally caused by pickling steel too hot.
Burr
Mashers
Devices used to remove build up on edge of strip after the slitting
process.
Burr
1. Built up edge or roughness on the bottom of the strip resulting from
slitting or shearing.
Butt
Weld
Weld made to join two strip ends set against each other.
Butt
Welding
Joining two edges or ends by placing one against the other and welding
them.
Butterfly
Rotating disc-type valve which moves 90 degrees from the closed position
to the fully open position. Normally used to stop or control the flow
through a line, the butterfly regulates BOP steam and power house steam
on main plant service line.
Butyl
Stearate (BSO)
A lubricant applied on
electrolytic chromium coated steel (Weirchrome) at WSC.
By Coil
Selling term which refers to
product sold in the form of a coil vs. cut plate. "Bi Coil" is also used
in production to refer to coils vs. cut plate.
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