Arsenical copper

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File:Head of a dignitary, Iran, about 2000 BC, arsenical copper - Cincinnati Art Museum - DSC04606.JPG
Sculpted head of a dignitary from ancient Iran (c.2000 BC) in arsenical copper

Arsenical copper contains up to 0.5% arsenic which, at elevated temperatures, imparts higher tensile strength and a reduced tendency to scaling. It is typically specified in boiler work, especially locomotive fireboxes.[1][2][3] It also helps prevent embrittlement of oxygen free copper by bismuth, antimony and lead by the formation of complex oxides. Copper with a larger percentage of arsenic is called arsenical bronze, which can be work-hardened much harder than copper.

See also

References

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