Alloy for the manufacture of balance springs.

Trade name (from the producer's name) of a steel alloy, resisting magnetization, used for modern self-compensating balance springs (s.). The quality level of this material is indicated by the numeral following the name in decreasing value from 1 to 5.

Nivarox (Nicht Variable Oxydfest - Not Variable Resistant to Oxidation) is a metallic alloy, which is used mainly in the watch industry. This alloy composed of iron, 40 % nickel, chromium, titanium and beryllium has properties, which are very useful in building the balances. The hairsprings made of this alloy will not wear out; they are almost non-magnetic, anti-rust and they have a very low coefficient of thermal expansion.