Ir3W

metal
· Ir3W

Ir3W is an iridium-tungsten intermetallic compound combining two of the densest and highest-melting refractory metals. This material is primarily explored in high-temperature and extreme-environment applications where conventional superalloys reach their limits, particularly in aerospace, nuclear, and specialized industrial heating contexts where exceptional strength retention, oxidation resistance, and dimensional stability at elevated temperatures are critical. Engineers consider Ir3W-class materials when designing components that must survive prolonged exposure to extreme thermal cycling, corrosive atmospheres, or demanding mechanical loads in applications where material cost and density are secondary concerns to performance and reliability.

high-temperature aerospace enginesrefractory heating elementsnuclear reactor componentsextreme-environment fastenersresearch and developmentspecialized medical/industrial crucibles

Compliance & Regulations

?EAR?Conflict Free?RoHS?REACH?TSCA?Prop 65
PropertyValueUnitConditionsSource
Bulk Modulus(K)3 entries
351.3
GPa
351.3
GPa
353.1
GPa
Elastic Compliance Tensor(Sij)
Matrix (redacted)
1/GPa
Elastic Anisotropy(AU)
0.08058
-
Elastic Stiffness Tensor(Cij)
Matrix (redacted)
Pa
Poisson's Ratio(ν)2 entries
0.2675
-
0.2700
-
Shear Modulus(G)3 entries
193.3
GPa
193.3
GPa
190.5
GPa
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)
21.27
kg/m³
Verified Unverified Low confidence (<80%) Link to source
PropertyValueUnitConditionsSource
Band Gap(Eg)
0.000
eV
Magnetic Moment(μB)
0.000
µB
Seebeck Coefficient(S)
2.810
µV/K
Verified Unverified Low confidence (<80%) Link to source
PropertyValueUnitConditionsSource
Energy Above Hull(ΔEhull)
0.000
eV/atom
Formation Energy(ΔHf)
-0.3528
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.