ABSTRACT
The term "shape" as applied to rolled strip is rather ambiguous in that it may refer to the cross-sectional geometry of the strip or to the ability of the strip to lie flat on a horizontal, planar surface. The former, particularly in the case of plates and sheets, is commonly designated "crown", especially when it is intended to denote the difference in thickness between the center of a strip and its edges. Since the sideways spread of thin workpieces during cold reduction is severely restricted due to transverse frictional effects in the roll bite, the profile existing in the hot-rolled strip prior to its reduction is repeated with considerable exactness in the profile of the cold reduced strip. Strip profile irregularities in the hot band produce defects known as build-up or ridges in the cold-reduced coil. Strips with wedge and concave profiles appear to be particularly subject to abrupt gage variations.
