The precision resistance alloy MANGANIN®, developed by
Isabellenhütte, is especially characterized by low temperature
coefficient between +20 and +50 °C with a parabolic shape of the
R(T) curve, high long-term stability of electrical resistance,
extremely low thermal EMF versus copper and good working properties. Due to these features MANGANIN® is the standard material
for precision, standard and shunt resistors. MANGANIN® is the
basis for the production of ISA-PLAN® and ISA-WELD® components.
The maximum working temperature in air is +140 °C. However,
higher thermal loads in a non-oxidizing atmosphere are possible.
When used for precision resistors with the highest requirements,
the resistors should be carefully stabilised and the application
temperature should not exceed +60 °C. Exceeding the maximum working temperature in air may result in a resistance drift generated
by oxidizing processes. Thus, the long-term stability can be affected
negatively. As a result, the resistivity as well as the temperature
coefficient of the electric resistance may slightly change. It is also
used as low cost replacement material for silver solder for hard