A highly elastic, hard, non-magnetic and non-oxidising alloy used to make monometallic balances, assortments (escapements) and balance-springs. A Glucydur balance is made from a copper alloy containing 3% beryllium and around 0.5% nickel. It is recognisable by its gold colour. Due to such properties as hardness, resistance to deformation, damage, corrosion or magnetic fields and its stability this alloy is perfect for making balance wheels for watch movements.
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