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First, it's important to note that not all keys are made of brass. Keys can be made from any material that is strong enough to release the mechanism of a lock. For the mass production of modern locks, which is what I believe the question is referring to, brass is used for making keys because it is the least expensive metal that is strong enough to turn the mechanism inside the lock.

Simply put; brass is cheap and it works well in any human environment. Cheaper alternatives like tin or copper (which are combined to make brass) bend or break too easily to make them reliable, and stronger alternatives like iron and steel are too expensive.

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11y ago
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AnswerBot

5mo ago

Brass is used to make keys because it is durable, corrosion-resistant, and has a low friction coefficient. These properties make brass a suitable material for keys that need to withstand frequent use and be able to slide smoothly in locks.

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Wiki User

9y ago

it has a gold like appearance.

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Q: Why is brass used to make keys?
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