| BETA RATIO (#) | (english) The amount, expressed as a ratio, of particles in a fluid stream upstream of a filter, after the fluid posses through a filter, divided by the amount of particles downstream, for a particular size particle. |
| Bevel | (english) Angle formed between the prepared edge of the end of tube and a plane perpendicular to the surface. Standard pipe bevel is 30 degrees. |
| BHN | (english) Brinell Hardness Number |
| BI | (english) Chemical symbol for Bismuth |
| 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. |
| Big Winch | (english) The tool used to spot (or position) the rail cars for unloading. It is located on the north end of the unloading area. |
| Billet | (english) (1) A semi-finished section hot rolled from a metal ingot, with a rectangular cross section usually ranging from 16 to 36 in., the width being less than twice the thickness. Where the cross section exceeds 36 in., the term “bloom” is properly but not universally used. Sizes smaller than 16 in. are usually termed “bars”; a solid semi-finished round or square product which has been hot worked by forging, rolling, or extrusion. (2) A semi-finished, cogged, hot rolled or continuous-cast metal product of uniform section, usually rectangular with radiused corners. Billets are relatively larger than bars. |
| Billet 2 | (english) A solid semi-finished round or square product that has been hot worked by forging, rolling, or extrusion. An iron or steel billet has a minimum width or thickness of 1 1/2 in. and the cross-sectional area varies from 2 1/4 to 36 sq. in. For nonferrous metals, it may also be a casting suitable for finished or semi-finished rolling or for extrusion. |
| Billet container | (english) The part of the extrusion press into which the billet to be extruded is placed. |