CrB4

metal
· JVASP-63127· CrB4

CrB4 is a chromium tetraboride ceramic compound belonging to the boride family of hard, refractory materials. It is primarily of research and specialized industrial interest for applications requiring extreme hardness and thermal stability, particularly in cutting tools, wear-resistant coatings, and high-temperature structural applications where conventional hardmetals would fail. CrB4 combines the hardness characteristic of boride ceramics with chromium's corrosion resistance, making it attractive for environments combining mechanical wear and chemical aggression, though its brittleness and manufacturing complexity limit broader adoption compared to established alternatives like tungsten carbide or cubic boron nitride.

cutting tool insertswear-resistant coatingshigh-temperature abrasive applicationsrefractory componentsspecialized ceramic armorresearch materials

Compliance & Regulations

?EAR?Conflict Free?RoHS?REACH?TSCA?Prop 65
Units:
siimperial
PropertyValueUnitConditionsSource
Bulk Modulus(K)
—
Pa——
Poisson's Ratio(ν)
—
-——
Shear Modulus(G)
—
Pa——
Verified Unverified Low confidence (<80%) Link to source
PropertyValueUnitConditionsSource
Density(ρ)
—
kg/m³——
Verified Unverified Low confidence (<80%) Link to source
PropertyValueUnitConditionsSource
Band Gap(Eg)
—
eV——
Magnetic Moment(μB)
—
µB——
Verified Unverified Low confidence (<80%) Link to source
PropertyValueUnitConditionsSource
Energy Above Hull(ΔEhull)
—
eV/atom——
Formation Energy(ΔHf)
—
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.