Pot metal


Pot metal

Pot metal, also known as monkey metal, white metal or die-cast zinc, is a slang term that refers to alloys that consist of inexpensive, low-melting point metals used to make fast, inexpensive castings.

There is no scientific metallurgical standard for pot metal; common metals in pot metal include zinc, lead, copper, tin, magnesium, aluminium, iron, and cadmium. The primary advantage of pot metal is that it is quick and easy to cast. Due to its low melting temperature no sophisticated foundry equipment is needed and specialized molds are not necessary. It is sometimes used to experiment with molds and ideas before using metals of higher quality. Examples of items created from pot metal include toys, furniture fittings, tool parts, electronics components, and automotive parts.[citation needed]

Pot metal can be prone to instability over time, as it has a tendency to bend, distort, crack, shatter, and pit with age. The low boiling point of zinc and the fast cooling of the newly-cast part often allow air bubbles to remain within the cast part, weakening the metal. Many of the components of pot metal are susceptible to corrosion from airborne acids and other contaminants, and the internal corrosion of the metal often causes the decorative plating to flake off.[citation needed] Pot metal is not easily glued, soldered or welded.

At one time, "pot metal" referred to a copper alloy that was primarily alloyed with lead. 67% Cu, 29% Pb & 4% Sb and 80% Cu, 20% Pb were common formulations.[1]

The primary component of pot metal is zinc, but often the caster adds other metals to the mix to strengthen the cast part, improve the flow of the molten metal, or to reduce cost.[dubious ] With a low melting point of 419 °C (786 °F), zinc is often alloyed with other metals including lead, tin, aluminium and copper.

See also

References

  1. ^ Balfour, Edward (1885), The Cyclopædia of India and of Eastern and Southern Asia, 3 (3 ed.), London: Bernard Quaritch, p. 271 



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Look at other dictionaries:

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  • pot metal — noun 1. cast iron used for making cooking wares • Hypernyms: ↑cast iron 2. an alloy of copper and lead used especially for making large pots • Hypernyms: ↑alloy, ↑metal * * * noun 1 …   Useful english dictionary

  • pot metal — 1. an alloy of copper and lead, formerly used for making plumbing fixtures, bearings, etc. 2. cast iron of a quality suitable for making pots. 3. a low grade nonferrous alloy used for die casting. 4. Glassmaking. a. glass colored by being mixed… …   Universalium

  • pot metal — /ˈpɒt mɛtl/ (say pot metl) noun 1. an alloy of copper and lead formerly used in plumbing fixtures. 2. Glassmaking glass coloured while it is being fused …   Australian English dictionary

  • Pot metal — Technique for making stained glass by adding one or more metallic oxides to molten glass. Cf. Paint; Yellow …   Dictionary of Medieval Terms and Phrases

  • pot metal — An alloy that is cast as a unit. It is relatively inexpensive to make, but is easily subject to breakage …   Dictionary of automotive terms

  • pot-metal — …   Useful english dictionary

  • Pot — Pot, n. [Akin to LG. pott, D. pot, Dan. potte, Sw. potta, Icel. pottr, F. pot; of unknown origin.] 1. A metallic or earthen vessel, appropriated to any of a great variety of uses, as for boiling meat or vegetables, for holding liquids, for plants …   The Collaborative International Dictionary of English

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