| Breakage | (english) Cracks or separation of the steel. |
| 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. |
| Breakout | (english) An accident caused by the failure of the walls of the hearth of the furnace resulting in liquid iron or slag (or both) flowing uncontrolled out of the blast furnace. |
| BREATHER | (english) A device which permits air to move in and out of a container or component to maintain atmospheric pressure. |
| Bridle | (english) A set of rolls used to maintain tension on the strip as it goes through the line. |
| Bridle Rolls | (english) A series of neoprene or steel rolls. |
| Bridle Snubber | (english) The roll above the bridle rolls used to thread the strip. Also is used to steer the strip through the bridle. |
| Bridle Unit | (english) A three-roll cluster used to control line tension at strategic locations on the line. |
| Bridling | (english) The cold working of dead soft annealed strip metal immediately prior to a forming, bending, or drawing operation. A process designed to prevent the formulation of Luder's lines. Caution-Bridled metal should be used promptly and not permitted to (of itself) return to its pre-bridled condition. |
| Bright Annealed Wire | (english) Steel wire bright drawn and annealed in controlled non-oxidizing atmosphere so that surface oxidation is reduced to a minimum and the surface remains relatively bright. |