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Pewter
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== Properties == Pewter, being a softer material, can be manipulated in various ways such as being [[Casting (metalworking)|cast]], hammered, [[Lathe|turned]], [[Metal spinning|spun]] and [[Engraving|engraved]]. Given that pewter is soft at room temperature, a pewter [[bell]] does not ring clearly. Cooling it in [[liquid nitrogen]] hardens it and enables it to ring, but also makes it more brittle.<ref>{{cite web|url=http://berkeleyphysicsdemos.net/node/321|title = LN2 demos: Pewter bell and spring, color change tube, LN2 cannon. | Lecture Demonstrations}}</ref>
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