casting brass

casting brass

This topic has 2 replies, 2 voices, and was last updated 6 January 2021 at 22:41 by noel shelley.

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6 January 2021 at 22:27 #518066
grimme
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@grimme
has anyone succeeded in casting brass without the zinc flashing off, or even making brass? i know it is done, but how when zinc flashes off at 900 and copper melts at 1100?
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6 January 2021 at 22:27 #30095
grimme
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@grimme
6 January 2021 at 22:41 #518069
noel shelley
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@noelshelley55608
Done it 100s of times. There are many tricks to doing it but it is not a black art. PM me. Noel

To expand a little, most burning metals are exothermic. To prevent the Zinc vapour from burning and further increasing the temperature you must keep the oxygen away, this is done cheaply by a layer of crushed charcoal over the melt.Temperature control is vital. In the small scale foundry and the big some zinc will be lost but under careful control it will not be enough to matter. Zinc fumes are toxic !

Edited By noel shelley on 06/01/2021 23:00:29
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