He — Properties & Data | MatWorld

He

metal

· JVASP-25167· He

Helium (He) is a lightweight, inert noble gas that exists as a liquid or solid only under extreme cryogenic conditions; in practical engineering contexts, it is most often encountered as a pressurized gas. The material is valued in aerospace, medical imaging, and cryogenic cooling applications for its exceptional thermal conductivity, inertness, and low density, making it irreplaceable in superconducting magnet systems, deep-sea diving gas mixtures, and precision leak detection where alternative gases would introduce contamination or safety risks.

cryogenic cooling and liquefactionMRI and NMR superconducting magnetsdeep-sea and saturation divingleak detection and tracer gasaerospace purging and pressurizationsemiconductor and welding inert atmosphere

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions
Bulk Modulus(K)	840.0	MPa	DFT · OptB88vdW
Poisson's Ratio(ν)	0.2900	-	DFT · OptB88vdW
Shear Modulus(G)	450.0	MPa	DFT · OptB88vdW

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

Property	Value	Unit	Conditions	Source
Density(ρ)	382	kg/m³	DFT · OptB88vdW

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

Property	Value	Unit	Conditions	Source
Band Gap(Eg)	18.09	eV	DFT · OptB88vdW
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW

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

Property	Value	Unit	Conditions	Source
Energy Above Hull(ΔEhull)	0.000	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)	0.000	eV/atom	DFT · OptB88vdW

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

Reference data from cited sources. Not verified or certified by MatWorld Inc. Verify against the source before use in design. Terms: engineering data

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.

He

Mechanical Properties

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental

Export Control