The Curie temperature of Alloy 400 lies within the ambient range, between values of 21°C and 49°C (70 -120°F). Monel 400 loses its magnetic properties at temperatures above this range. The exact range boundary values are affected by the chemical composition of a given batch, so some will be slightly magnetic at room temperature and some will not. It is therefore not possible to accurately confirm this characteristic of the alloy at room temperature. Monel 400 is not recommended if there is a strong requirement for non-magnetic characteristics.