BeCuSi2

metal

· JVASP-71042· BeCuSi2

BeCuSi2 is a beryllium-copper-silicon ternary alloy that combines the high strength and thermal conductivity of beryllium-copper systems with silicon additions for improved wear resistance and hardness. This material family is employed in precision electrical contacts, springs, and wear-resistant bearings where demanding combinations of electrical conductivity, strength, and thermal management are required; it is particularly valued in aerospace and high-reliability electronics applications where conventional copper alloys cannot meet performance thresholds, though beryllium content requires careful handling and surface protection in manufacturing.

electrical contacts and connectorsprecision springs and fastenersbearing surfaces and bushingsaerospace componentsheat-dissipation applicationswear-resistant tooling

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Density(ρ)	3.934	kg/m³	—

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

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

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

Property	Value	Unit	Conditions	Source
Energy Above Hull(ΔEhull)	0.3740	eV/atom	—
Formation Energy(ΔHf)	0.3170	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.

BeCuSi2

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental

Export Control