# 1J50

> Soft magnetic Fe-Ni alloy with high permeability and low coercivity for transformer cores and magnetic shielding.

1J50 is a Chinese soft magnetic alloy (50% Ni-Fe) offering high initial permeability, low coercivity and high saturation induction. It is the standard material for instrument transformer cores, magnetic amplifiers, relay armatures and electromagnetic shielding applications.

## Key features

- High initial permeability (>30,000)
- Low coercivity (<8 A/m)
- High saturation induction
- Good cold formability
- High-temperature annealing required

## Applications

- Instrument transformer cores
- Magnetic amplifier laminations
- Relay and solenoid armatures
- Electromagnetic shielding
- Sensor and transducer cores

## Standards

- GB/T 14986
- IEC 60404-8-6