Accidental discovery

Accedental discoveryDuring World War I a metallurgist called Harry Brearley tried mixing chromium with steel to make a stranger gun barrel. It didn’t work. The barrel shattered. But the metal pieces he threw away outside stayed bright and didn’t rust. Quite by accident, the secret of making stainless steel had been discovered.

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What makes a stainless steel stainless?

Stainless steel resists rust because it contains a high proportion of chromium to carbon. Before …

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