NICKEL-FREE CUPREOUS ALLOY OF A COPPER, MANGANESE, SILICON TYPE

摘要

The invention relates to a novel alloy that is based on copper, manganese, and silicon and is essentially nickel-free. Said essentially nickel-free alloy is obtained by massive casting of an alloy substantially comprising more than 8 percent but no more than 25 percent by weight of manganese and more than 0.3 percent but less than 1.5 percent by weight of silicon, the remaining percentage being made up of copper. Said alloy is subjected to at least one thermal treatment in the massive form thereof, which modifies the mechanical properties of the alloy. The inventive alloy is used instead of nickel-containing cupreous alloys for making eyewear, fashion jewelry, leatherwear, metallic buttons, cutlery and flatware, coins, and medals.