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Of or pertaining to any element, compound or alloy that conducts both heat and electricity.

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nickel-based superalloys

Metals; Steel

Nickel-based alloys developed for very high temperature service where relatively high stresses are encountered and where high surface stability is frequently required. Typical ...


Metals; Steel

An exotic alloy valued for its strength at extremely high temperatures and its ability to superconduct, or pass electricity with minimal resistance, at very low temperatures. It ...

No. 1 heavy melt

Metals; Steel

Obsolete steel scrap grade, at least one-quarter inch in thickness and in sections no larger than five feet by two feet. Much of the metal comes from demolished buildings, truck ...

oil country tubular goods (OCTG)

Metals; Steel

Label applied to the pipe products used by petroleum exploration customers. OCTG includes casing, drill pipe, and oil well tubing, which, depending on their use, may be formed ...

opeb expense

Metals; Steel

Other Postretirement Employment Benefits: Usually refers to health care obligations to a mill’s retired workers, although its meaning also can include layoff benefits (see FAS ...

open hearth furnace

Metals; Steel

A broad, shallow hearth to refine pig iron and scrap into steel. Heat is supplied from a large, luminous flame over the surface, and the refining takes seven to nine hours. Open ...

operating rates

Metals; Steel

The ratio of raw steel production to the mill’s stated capacity. Each December, steel companies report to the AISI their estimated capacity (if they could sell all steel they ...