| Blush | (english) A coating defect consisting of the whitening of a cured film which results in a translucent or opaque appearance with accompanying loss of gloss. Blushing usually occurs during the pasteurization or steam processing of films which are undercured or water sensitive. |
| Body-Centered | (english) Having the equivalent lattice points at the corners of the unit cell, and at its center; sometimes called centered, or space-centered. |
| Boil | (english) Agitation of a bath of metal caused by the liberation of a gas beneath its surface. May be deliberately induced by the addition of oxidizing material to a bath containing excess carbon. In the later case it is called a carbon boil and CO or CO2 are liberated. |
| Boiler | (english) A closed vessel in which water, is transformed into steam at a given pressure and temperature under controlled conditions. |
| Bolster (die block) | (english) A “tool” or reinforcing part which supports the backer-which, in turn, supports an extruding die against the pressure of extrusion. |
| BOLT KIT | (english) A set of bolts or screws that ore selected to suit a particular application, i.e. pre-selected length, threads and strength to match the mounted component. |
| Bonderized Coating | (english) A thin film of phosphate pretreatment applied to a steel surface (bare or zinc coated) to enhance paintability. |
| Bonderizing | (english) The coating of steel with a film composed largely of zinc phosphate in order to develop a better bonding surface for paint or lacquer. |
| Bonding Clay (Bonderise) | (english) Any clay suitable for use as a bonding material. |
| Boring Bar (cuffer bar) | (english) A combination tool holder and shank. |