HfW2

metal
· HfW2

HfW2 is a refractory intermetallic compound combining hafnium and tungsten, belonging to the family of ultra-high-temperature materials designed for extreme thermal and mechanical environments. This material is primarily of research and developmental interest for aerospace and advanced energy applications where conventional superalloys reach their limits, particularly in systems requiring exceptional hardness and thermal stability at temperatures exceeding 1500°C. The hafnium-tungsten system is notable for its potential in next-generation rocket nozzles, hypersonic vehicle leading edges, and nuclear reactor components, where the combination of high density and refractory character offers advantages over monolithic tungsten or traditional nickel-based superalloys.

aerospace propulsion systemshypersonic vehicle structuresnuclear reactor componentsultra-high-temperature coatingsrefractory materials researchextreme environment applications

Compliance & Regulations

?EAR?Conflict Free?RoHS?REACH?TSCA?Prop 65
Units:
siimperial
PropertyValueUnitConditionsSource
Bulk Modulus(K)2 entries
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ksi——
↳
—
ksi——
Elastic Compliance Tensor(Sij)
Matrix (redacted)
1/GPa——
Elastic Anisotropy(AU)
—
-——
Elastic Stiffness Tensor(Cij)
Matrix (redacted)
ksi——
Poisson's Ratio(ν)
—
-——
Shear Modulus(G)2 entries
—
ksi——
↳
—
ksi——
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.
Verified Unverified Low confidence (<80%) Link to source
PropertyValueUnitConditionsSource
Density(ρ)
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lb/in³——
Verified Unverified Low confidence (<80%) Link to source
PropertyValueUnitConditionsSource
Band Gap(Eg)
—
eV——
Magnetic Moment(μB)
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µB——
Seebeck Coefficient(S)
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µV/K——
Verified Unverified Low confidence (<80%) Link to source
PropertyValueUnitConditionsSource
Energy Above Hull(ΔEhull)
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eV/atom——
Formation Energy(ΔHf)
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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.