VIr
metal· VIr
VIr is a vanadium-iridium alloy that combines the high-temperature strength and corrosion resistance of iridium with vanadium's contribution to hardness and wear resistance. This refractory metal alloy is used in extreme-environment applications where conventional superalloys or tungsten-based materials cannot withstand the combination of high temperature, oxidation, and mechanical stress, making it valuable for aerospace propulsion systems, nuclear reactors, and specialized tooling. Engineers select VIr when weight savings and performance at elevated temperatures outweigh the material's density and cost, though it remains primarily a research and specialized-application material rather than a commodity choice.
high-temperature aerospace componentsnuclear reactor applicationsrefractory metal alloysextreme-environment toolingresearch and specialty applicationsoxidation-resistant coatings
Compliance & Regulations
?EAR?Conflict Free?RoHS?REACH?TSCA?Prop 65
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Bulk Modulus(K)3 entries | 39,784.4 | ksi | — | ||
| ↳ | 39,568.6 | ksi | — | ||
| ↳ | 34,519 | ksi | — | ||
Elastic Compliance Tensor(Sij) | Matrix (redacted) | 1/GPa | — | ||
Elastic Anisotropy(AU) | 0.6206 | - | — | ||
Elastic Stiffness Tensor(Cij) | Matrix (redacted) | ksi | — | ||
Poisson's Ratio(ν)2 entries | 0.3054 | - | — | ||
| ↳ | 0.09000 | - | — | ||
Shear Modulus(G)3 entries | 17,794.7 | ksi | — | ||
| ↳ | 16,776.2 | ksi | — | ||
| ↳ | 2,932.7 | 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
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 0.5229 | lb/in³ | — |
Verified Unverified Low confidence (<80%) Link to source
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Band Gap(Eg)2 entries | 0.000 | eV | — | ||
| ↳ | 0.000 | eV | — | ||
Magnetic Moment(μB) | 0.000 | µB | — | ||
Seebeck Coefficient(S) | 3.203 | µV/K | — |
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
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Energy Above Hull(ΔEhull) | 0.02300 | eV/atom | — | ||
Formation Energy(ΔHf)2 entries | -0.2912 | eV/atom | — | ||
| ↳ | -0.5253 | eV/atom | — |
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
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.