Shingling (metallurgy)
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Shingling was a stage in the production of bar iron or steel, in the finery and puddling processes. As with many ironmaking terms, this is derived from the French - cinglage
The product of the finery was a bloom or loop (French loup); that of the puddling furnace was a puddled ball. In each case, this needed to be consolidated to a more regular shape. This was done using a power hammer, worked either by a waterwheel or steam. In the finery, this was part of the work of the finer; in puddling, it was done by a special workman called the shingler. The iron (or steel) then had to be drawn out under the hammer or rolled in a rolling mill to produce a bar. In more recent times, the process has been carried out using mechanical jaws ro squeeze the puddled ball into shape.
Further reading
H. R. Schubert, History of the British irona nd steel industry (1957), 285-6; W. K. V. Gale, The iron and steel industry: a dictionary of terms (Newton Abbot, 1971), 184.
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