IrW — Properties & Data | MatWorld

IrW

metal

· IrW

IrW is a refractory metal alloy combining iridium and tungsten, two of the densest and highest-melting-point elements in the periodic table. This material is engineered for extreme-environment applications where both thermal stability and mechanical integrity must be maintained at temperatures and stresses that would degrade conventional superalloys. IrW is used primarily in aerospace, nuclear, and precision instrumentation sectors where weight is secondary to reliability and performance at the limits of material science—such as in rocket nozzles, nuclear reactor components, and specialized laboratory instruments.

rocket engine nozzlesnuclear reactor componentshigh-temperature aerospace structuresextreme-environment instrumentationrefractory applications above 2000°Cprecision gravitational sensing devices

Compliance & Regulations

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

Units:

si imperial

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Method

Property	Value	Unit	Conditions
Bulk Modulus(K)2 entries	334.2	GPa	DFT
↳	334.2	GPa	DFT · PBE
Elastic Compliance Tensor(Sij)	Matrix (redacted)	1/GPa	DFT · PBE
Elastic Anisotropy(AU)	0.1126	-	DFT · PBE
Elastic Stiffness Tensor(Cij)	Matrix (redacted)	Pa	DFT · PBE
Poisson's Ratio(ν)	0.2686	-	DFT · PBE
Shear Modulus(G)2 entries	182.8	GPa	DFT
↳	182.8	GPa	DFT · PBE

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, or test environment.

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

Property	Value	Unit	Conditions	Source
Density(ρ)	20.41	kg/m³	DFT · OptB88vdW

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

Filter by

Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)	0.000	eV	DFT · OptB88vdW
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Thermoelectric Power Factor(PF)2 entries	0.000444	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.000440	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	4.530	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	4.477	μV/K	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C

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, or test environment.

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

Property	Value	Unit	Conditions	Source
Energy Above Hull(ΔEhull)	0.2218	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)	-0.1990	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.

IrW

Mechanical Properties

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental

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