Designation for neoprene jacketed heater cord.

1) A fitting to attach threaded conduit to boxes. 2) The central part of a cylinder into which a shaft may be inserted. 3) A reference point used for overhead line layout.

An electro-galvanizing process using either soluble zinc anodes or insoluble graphite or magnetite electrodes in an ammoniacal solution as electrolyte.

Interference from AC power, normally of low frequency and audible.

A corrosion test involving exposure of specimens at controlled levels of humidity and temperature. Contrast with Salt-fog Test.

See Buckle, a preferred term for this condition.

Designation for High Voltage.

Designation for radio hookup wire with polyvinyl insulation. With or without nylon jacket, braid, or shield, 2500V.

An assembly of two or more cables (of the same or different types or categories) covered by one overall sheath.

Acid sometimes used to descale and clean rod or wire surfaces prior to drawing or the application of metallic coatings. See Pickling Acids.

A device used to separate liquids and solids relying on centrifugal forces generated within a fixed conical chamber.

A lubrication regime in which drawing die and wire are separated by a thick lubricant film so that there is no contact between the sliding surfaces. The film thickness results from high lubricant pressure in the die due to relative surface velocities as lubricant is forced through a narrow gap at the entrance of the drawing die, or squeezed out of the contact area between the die and wire surfaces in the approach zone of the drawing die.

A chemical compound of hydrogen and fluorine. It can be dangerous to handle but it can be useful in certain pickling formulations.

Element, chemical symbol H. A colorless gas, which is strongly absorbed by many metals. Widely used for reduction of metals from their oxides. Hydrogen may cause several types of defects in steel, and its presence in the metal is almost never beneficial. In steel, the three main sources of hydrogen are steelmaking, pickling and electrocoating and steps should be taken to remove any hydrogen thus introduced (e.g., baking after pickling and coating). This element may also cause embrittlement in ETP copper by its reaction with copper oxides. See Hydrogen Atmosphere, Hydrogen Embrittlement.

Hydrogen used to replace oxygen contained in a chamber where heat treating or metal forming take place.

A general term for the embrittlement, cracking, blistering and hydride formation that can occur when hydrogen is present in some metals.

A condition of low ductility in some metals resulting from the absorption of hydrogen.

A method that can be utilized to determine oxygen content in copper alloy.

A process where a billet is pushed through a die by pressurized fluid in place of a ram. The billet is placed in a container and nosed to fit a conical die in one end of the container. The billet is completely surrounded by a fluid that is pressurized by forcing down a plunger or by other means. See Wire Extru­sion.

A material capable of absorbing and retaining moisture from the air.