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Gun-metal contains around _______________ copper.(a) 9-11%(b) 0.2%(c) 86-89%(d) 5-10%This question was posed to me in an interview for job.This intriguing question originated from Properties of Copper and its Alloys-2 in chapter Copper and its Alloys of Aerospace Materials & Processes

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Right ANSWER is (c) 86-89%

For EXPLANATION: Gun-metal includes around 86-89 per-cent of copper. It is also made of various ELEMENTS like zinc, tin, LEAD, copper, ETC. Gun-metal contains around 86-89% per-cent of copper and a maximum of 2 per-cent of lead.



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