For the purpose of improving the magnetic shunt alloys hitherto used, the magnetic properties of Fe-Ni-Cr alloys, containing 30～60% of Ni, 1～18% of Cr and having no allotropic transformation, were measured at various temperatures ranging from -50° to 100° It has been found that those alloys with the magnetic transformation point of about 100° show excellent characteristics of magnetic shunt as follows : The permeability in 400 Oe at 0° are 5～20 and their temperature coefficient, 0.003～0.040, the permeability varying almost linearly with the temperature. And the authors have named them "M. S Alloy"
