FeCoB

metal

· JVASP-107762· FeCoB

FeCoB is an iron-cobalt-boron soft magnetic alloy designed for high-performance electromagnetic applications requiring excellent magnetic saturation and low coercivity. It is primarily used in precision magnetic cores, actuators, sensors, and transformer components where efficient energy transfer and minimal hysteresis losses are critical; the cobalt addition enhances saturation magnetization while boron improves hardness and amorphous formation, making it competitive with traditional silicon steels and nanocrystalline alternatives in weight-sensitive or high-frequency applications.

soft magnetic coreselectromagnetic actuatorsprecision sensorstransformer laminationshigh-frequency inductorsmagnetic shielding applications

Compliance & Regulations

?EAR?Conflict Free?RoHS?REACH?TSCA?Prop 65

Units:

si imperial

Property	Value	Unit	Conditions	Source
Density(ρ)	0.2861	lb/in³	—

Verified Unverified Low confidence (<80%) Link to source

Property	Value	Unit	Conditions	Source
Band Gap(Eg)	0.000	eV	—
Magnetic Moment(μB)	5.413	µB	—

Verified Unverified Low confidence (<80%) Link to source

Property	Value	Unit	Conditions	Source
Energy Above Hull(ΔEhull)	0.00710	eV/atom	—
Formation Energy(ΔHf)	-0.2573	eV/atom	—

Verified Unverified Low confidence (<80%) Link to source

Regulatory Screening

Environmental

Export Control

RoHS, REACH, and Prop 65 statuses are validated against official substance lists (ECHA SVHC Candidate List, OEHHA Prop 65, RoHS Annex II). Other regulations are estimated from composition and material classification. All screening is a starting point for due diligence — always verify with your supplier before making compliance decisions.

FeCoB

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental

Export Control