Page 94 - MDI Steel Reference Guide

Glossary of Terms
described steel that has been plated with zinc using an electric current through an electrolyte. Proper name is Electrolytic Zinc Coated Sheet.
Fatigue - The tendency for a metal to break under conditions of repeated cyclic stressing considerably below the ultimate tensile strength.
Fluting - Fluting is a series of sharp parallel kinks or creases occurring in the arc when sheet steel is formed cylindrically, as to stretch the outer surface well beyond its yield point.
Friction Digs - A series of relatively short scratches variable in form and severity.
Galvanized - A term long used to describe steel coated with zinc. The term is associated with the hot-dip process but zinc coating can also be applied by electroplating. The hot-dip process consists of passing the steel through a bath of molten zinc. The electroplating process consists of the application of zinc by electrolytic deposition.
Galvannealed - Is a galvanized sheet steel which is altered by heat treatments or other processes immediately after coating, before the zinc solidifies. The coating produced consists entirely of iron zinc alloy and has a rougher appearance than the surface of regular coating. Sheets produced in this manner are dull gray in color, have no spangle, and after proper preparation, are well suited for painting.
Hardenability - Refers to the depth to which hardness penetrates. It is that property which determines the depth and distribution of hardness induced by quenching.
High Strength Steel - High strength structural quality sheet steel is a carbon/manganese steel... with a minimum specified yield strength of 35 KSI or greater (regardless of chemistry or processing used to achieve that strength level).
Hot Rolled - Describes steel products that are brought to approximate finished size by rolling at elevated temperatures.
Hot Rolled Plate - Product is defined in ASTM A6, paragraph 3.1. For widths over 8” to 48” thickness range is 0.230” and over. For widths over 48”, thickness range is 0.180” and over. Plate product is always cut to length.
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