| Base Box | (english) 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 Type | (english) 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. |
| Belt Wrapper | (english) Line equipment used in the Tin Mill for starting coils on prime or reject reels. The belt wrapper ensures a proper start. |
| Bi-Coil | (english) Also BY-COIL. Tin Mill term. Customers buy "by coil" or "bi-coil" rather than cut sheets |
| Bifluoride Feeder | (english) A machine in the Tin Mill that automatically puts bifluoride into the plater bath. |
| Black Plate | (english) A light weight or a thin uncoated steel sheet or strip so called because of its dark oxide coloring prior to pickling. It is manufactured by two different processes. (1) Form sheet bar on single stand sheet mills or sheet mills in tandem. This method is now almost obsolete. (2) On modern, high speed continuous tandem cold reduction mills from coiled hot rolled pickled wide strip into ribbon wound coils to finished gage. Sizes range from 12 to 32 in width, and in thicknesses from 55 lbs. to 275 lbs. base box weight. It is used either as is for stampings, or may be enameled or painted or tin or terne coated. |
| Bloom 2 | (english) A semi-finished hot rolled product, rectangular in cross section, produced on a blooming mill. For iron and steel, the width is not more than twice the thickness, and the cross-sectional area is usually not less than 36 sq. in. Iron and steel blooms are sometimes made by forging. |
| Blooming-Mill | (english) A mill used to reduce ingots to blooms, billets slabs, sheet-bar etc., |
| Braze Welding | (english) A family of welding procedures where metals are joined by filler metal that has a melting temperature below the solidus of the parent metal, but above 840 (450 C). |
| Breaker | (english) 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. |