Another illustration of the malleability of metal is afforded by metal spinning.
Substances having high specific gravity, malleability, opacity, and especially a peculiar lustre, the term "metal" became generic for all substances with these properties.
Iron renders the metal hard and brittle; arsenic, antimony and bismuth (up to 0.5%) reduce its tenacity; copper and lead (1 to 2%) make it harder and stronger but impair its malleability; and stannous oxide reduces its tenacity.
The malleability and ductility of metals lie at the basis of the work of the goldand silver-smiths at one extreme, and of the boiler-maker at the other.
Experiments he made with South Wales iron were failures because the product was devoid of malleability; Mr GOransson, a Swedish ironmaster, using the purer charcoal pig iron of that country, was the first to make good steel by the process, and even he was successful only after many attempts.