ErNi4B

metal

· ErNi4B

ErNi4B is an intermetallic compound in the erbium-nickel-boron system, combining a rare-earth element with transition metals to create a hard, brittle phase material. This is a research-phase compound primarily of scientific and materials development interest rather than an established commercial alloy; the erbium-nickel family is investigated for potential applications requiring high hardness, thermal stability, or specialized electromagnetic properties, though practical engineering use remains limited compared to conventional superalloys or tool materials.

materials research and developmentrare-earth intermetallicshard coatings (experimental)high-temperature phase studiesmagnetic materials research

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions
Bulk Modulus(K)	24,176.3	ksi	—
Poisson's Ratio(ν)	0.3000	-	—
Shear Modulus(G)	11,157.8	ksi	—

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

Property	Value	Unit	Conditions	Source
Density(ρ)	0.3372	lb/in³	—

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

Property	Value	Unit	Conditions
Band Gap(Eg)2 entries	0.000	eV	—
↳	0.000	eV	—
Seebeck Coefficient(S)	1.867	µV/K	—

N entriesMultiple entries per property — large groups are collapsed; click a summary row to expand. Use filters above to narrow by form, heat treatment, basis, or test environment.

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

Property	Value	Unit	Conditions	Source
Energy Above Hull(ΔEhull)	0.000	eV/atom	—
Formation Energy(ΔHf)	-0.5250	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.

ErNi4B

Mechanical Properties

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental

Export Control