ErFe4B

metal

· JVASP-20836· ErFe4B

ErFe4B is an intermetallic compound combining erbium, iron, and boron, belonging to the rare-earth iron boride family of materials. This material is primarily explored in research contexts for magnetic and high-strength applications, leveraging erbium's magnetic properties and the hardness contributed by boron. ErFe4B and related rare-earth iron borides show promise in specialty applications requiring combined magnetic performance and mechanical robustness, though industrial adoption remains limited compared to conventional ferromagnetic alloys.

rare-earth permanent magnetshigh-temperature magnetic devicesresearch and developmentmagnetic actuatorsaerospace/defense materials explorationboride-strengthened intermetallics

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions
Bulk Modulus(K)	166.4	GPa	—
Poisson's Ratio(ν)	0.3800	-	—
Shear Modulus(G)	42.19	GPa	—

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

Property	Value	Unit	Conditions	Source
Density(ρ)	8.785	kg/m³	—

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

Property	Value	Unit	Conditions	Source
Band Gap(Eg)	0.000	eV	—
Seebeck Coefficient(S)	-17.25	µV/K	—

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

Property	Value	Unit	Conditions	Source
Energy Above Hull(ΔEhull)	0.000	eV/atom	—
Formation Energy(ΔHf)	-0.2693	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.

ErFe4B

Mechanical Properties

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental

Export Control