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1、GlossaryNumerous terms are used in connection with the manufacture, sale and use of coated steel sheet. The following list defines the more common terms:A | B | C | D | E | F | G | H | I | K | L | M | O | P | Q | R | S | T | U | W | Y AAging - Changes in physical and mechanical properties that occur
2、 when low carbon steel is stored for some time. Aging is also accelerated by exposure of steel to elevated temperatures.Annealing - A process involving high-temperature heating and cooling of the as-rolled cold rolled steel substrate to make it softer and more formable.Return to topBBacker Coat - Us
3、ually refers to the coating on the reverse side of a prepainted sheet. The backer coating is generally not as narrowly specified with reference to its color, thickness and composition as is the topcoat.Return to topCCamber - The deviation of a side edge from a straight line, the measurement being ta
4、ken on the concave side with a straight edge.Carbon Steel - Steel which owes its properties chiefly to carbon without substantial amounts of other alloying elements; also known as straight carbon steel or plain carbon steel.Chemical Treatment - An aqueous solution of corrosion-inhibiting chemicals,
5、typically chromates or chromate/phosphate.Coil Breaks - Creases or ridges in sheet that appear as parallel lines across the direction of rolling, and that generally extend the full width of the sheet or strip. Also referred to as Lders Lines.Cold Rolled Products - Flat rolled products for which the
6、required final thickness has been obtained by rolling at room temperature.Color Standard - A painted sheet panel with a prescribed color of paint representing the precise color it is intended to produce in the prepainted sheet. The color standard will preferably also be expressed in terms of physica
7、l attributes of hue, lightness and saturation called tristimulus values or derivatives of these values. A complete color standard definition will usually include painted panels representative of the limits of acceptable deviation from the precise standard color as well.Commercial Steel (CS) - Sheet
8、of this quality is for simple bending or moderate forming. Commercial Steel sheet can be bent flat upon itself in any direction at room temperature.Continuous Casting - A casting technique in which a cast shape is continuously withdrawn through the bottom of the mold as it solidifies, so that its le
9、ngth is not determined by mold dimensions.Conversion Coating - The chemical treatment film applied to the steel or metallic coated sheet prior to painting.Corrosion - Gradual chemical or electrochemical attack on a metal by atmospheric moisture or other agents.Critical Surface - Intended for materia
10、l applied to critical exposed/painted applications where cosmetic surface imperfections are objectionable. The prime side surface will be free of repetitive type imperfections, gouges, scratches, scale and slivers. This surface can only be furnished as a pickled product.Crown - A contour on a sheet
11、where the thickness increases from some edge measurement to the center.Cut Edge - Removal of the as-rolled hot mill edge. Coil ends are cropped back to gauge when cut edge is ordered.Cut to Length - When a specific or discrete length is specified.Return to topDDeep Drawing - The process of working m
12、etal blanks in dies on a press into shapes which are usually more or less cup-like in character.Drawing - Forming recessed parts by forcing the plastic flow of metal in dies.Drawing Steel (DS) - Sheet of this quality has a greater degree of ductility and is more consistent in performance than Commer
13、cial Steel because of higher standards in production, selection and melting of the steel.Deep Drawing Steel (DDS) - Sheet of this designation should be used when Drawing Steel will not provide a sufficient degree of ductility for fabrication of parts having stringent drawing requirements, or applica
14、tions that require the sheet be free from aging. This quality is made by special steelmaking and finishing practices.Dent Resistant - BH Series - Sheet of this designation is produced from partially stabilized steel and offers a unique combination of as-received formability and final properties afte
15、r fabrication. Sheet of this designation combines strength and high formability. Although this steel is non-aging at room temperature, it gains strength from work-hardening during fabrication and from carbon-aging during paint-baking. (Sometimes referred to as bake hardenable.)Extra Deep Drawing Steel - Sheet of this designation has superior formability and excellent uniformity. It is produced from steel having a very low carbon content with stabilizing elements added to make it interstitial free. It is a non-aging steel sheet wi
