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163:.. Pot metal was commonly used to manufacture gramophone parts in the late 1920s and 1930s, with notable examples being the back covers on some HMV no.4 soundboxes and HMV no.5 soundboxes. It was also used to make loudspeaker transducers used with early radio horn speakers before cone speakers were developed. It is also used in inexpensive electric guitars and other budget-priced musical instruments.
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of low-melting point metals that manufacturers use to make fast, inexpensive castings. The term "pot metal" came about because of automobile factories' practice in the early 20th century of gathering up non-ferrous metal scraps from the manufacturing processes and melting them in one pot to form into
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Depending on the exact metals "thrown into the pot", pot metal can become unstable over time, as it has a tendency to bend, distort, crack, shatter, and pit with age. The low boiling point of zinc and fast cooling of newly cast parts often trap air bubbles within the cast part, weakening it. Many
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The primary component of pot metal is zinc, but often the caster adds other metals to the mix to strengthen the cast part, improve flow of the molten metal, or to reduce cost. With a low melting point of 420 °C (786 °F), zinc is often alloyed with other metals including lead, tin,
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components common in pot metal are susceptible to corrosion from airborne acids and other contaminants, and internal corrosion of the metal often causes decorative plating to flake off. Pot metal is not easily glued,
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referred specifically to a copper alloy that was primarily alloyed with lead. Mixtures of 67% copper with 29% lead and 4% antimony and another one of 80% copper with 20% lead were common formulations.
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cast products. Small amounts of iron often made it into the castings but never in significant quantity because too much iron would raise the melting point too high for simple casting operations.
159:. Items created from pot metal include toys, furniture fittings, tool parts, electronics components, automotive parts, inexpensive jewelry and
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refers to glass coloured with metal oxides while it is molten (in a pot), as opposed to other methods of colouring glass in sheet form.
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There is no metallurgical standard for pot metal. Common metals in pot metal include
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Pot metal is generally used for parts that are not subject to high stresses or
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Alloy of various low-melting point, usually scrap, metals
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The Cyclopædia of India and of
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275:Ralph L. Tomlinson Toy Collection Photographs
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147:model has cracked in the bow due to
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277:. Chapman University. January 1946
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271:"Britain Pot Metal Figures"
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240:: CS1 maint: postscript (
221:Oxford English Dictionary
255:Balfour, Edward (1885),
230:. Access behind paywall
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183:White metal
297:Categories
226:9 November
204:References
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129:Models of
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198:Zinc pest
149:zinc pest
140:Normandie
131:RMS
111:pot metal
76:magnesium
28:Pot metal
236:cite web
167:See also
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100:soldered
80:aluminum
34:) is an
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178:Pewter
157:torque
143:. The
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188:Zamak
102:, or
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283:2016
242:link
228:2020
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121:Uses
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64:lead
60:zinc
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