Page 92 - MDI Steel Reference Guide

Glossary of Terms
Aging - Changes in physical and mechanical properties that occur when low carbon steel is stored for some time. Aging is also accelerated by exposure of steel to elevated temperatures. Stretcher strains and fluting can result from aging.
Alloy Steel - Alloy steel is a group of steels with different chemical composition, forming characteristics and strength levels from those normally present in carbon steel. Alloy steel normally has higher alloy content than steel classified as high strength low alloy steel. Alloy steel is often heat treated after part fabrication to develop the desired final physical properties.
Annealing - A process of controlled heating, soaking at elevated temperatures, and controlled cooling for the purposes of softening, developing a micro-structure, improve machinablilty, or obtaining a special set of physical or mechanical properties.
Brinell Hardness Test - In the Brinell Hardness Test, the value obtained by dividing the applied load (in kilograms) by the surface area of the impression (in square millimeters) resulting from forcing a hard steel or carbide ball onto the steel test sample. The higher the number the harder the steel.
Camber - This is the deviation from edge straightness. The amount is determined along the concave side using straight edge and expressed as a measure per unit length, e.g. 1” in 20’.
Charpy V-Notch - This is a test to measure the impact strength, or notch toughness, of steel. It is of primary importance to evaluate steels for use where a brittle fracture hazard exists.
Coil Breaks - A deficit, exhibiting creases, a river type appearing, snaky pattern across a metal sheet running transverse to the coiling or rolling direction. The spacing is irregular and its location in the surface is very often random.
Cold Rolled Sheet Products - Flat rolled products for which the required thickness has been obtained by rolling HR bands or sheets without heating at approximately room temperature.
Commercial Quality (CQ) - Sheet of this quality is for uses involving simple bending or moderate drawing. Commercial Quality sheet can be bent flat upon itself in any direction at room temperature.
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