Alloy X is a nickel-chromium-iron-molybdenum alloy (UNS N06002) chosen when oxidation resistance and stability in hot gas dominate the design — combustor and burner parts, furnace hardware and hot-gas ducts. It is not the default nickel powder: IN718 is the structural workhorse and IN625 the corrosion workhorse. Alloy X earns its place when the part lives in a hot, oxidizing gas stream.
Already know the grade? See the Alloy X powder specification and price or request an Alloy X quote.
Where Alloy X fits
| Hardware | Why Alloy X is reviewed | What to define for acceptance |
|---|---|---|
| Gas turbine combustor, liner, transition duct | Oxidation resistance with cooling or mixing geometry that AM can build | Thermal cycling, local flame exposure, wall thickness, NDE |
| Burner and hydrogen combustion parts | Hot gas and complex mixing or cooling features | Fuel and oxidizer environment, flashback duty, thermal fatigue, inspection |
| Furnace fixtures, nozzles, flow hardware | High-temperature geometry with fewer joints | Atmosphere, load, distortion, surface condition |
| Hot-gas test articles | Instrumented flow paths under concentrated heat flux | Exposure profile, cooling, erosion, dimensional stability |
Reactor helium and liquid sodium are different environments from a furnace atmosphere. For those, use the gas-cooled and liquid-sodium reactor powder guide.
Alloy X or another high-temperature alloy?
| If the dominant need is… | Consider |
|---|---|
| Structural strength at moderate temperature | IN718 |
| Corrosion resistance and fabricability | IN625 |
| Oxidation-driven hot-gas service | Alloy X |
| Even higher oxidation resistance and thermal stability in sheet-type combustor parts | Alloy 230 or cobalt-base Alloy 188 |
| Turbine hot-section parts needing creep strength | IN939 or IN738 |
For the structural-versus-corrosion decision, see IN718 vs IN625 powder and the nickel-alloy powder selection guide.
Powder and thermal-route evidence
| Field | Specify | Why |
|---|---|---|
| Alloy identity | Exact Alloy X chemistry and specification (UNS N06002) | “Nickel superalloy” is not a specification |
| Process | LPBF or other qualified route, machine family | PSD and evidence depend on the process |
| Powder lot | Production route, PSD and method, morphology, condition, traceability | Controls identity and lot change |
| Thermal route | Stress relief, solution treatment, HIP | Final properties depend on condition |
| Service | Gas composition, temperature-time cycle, pressure, load | Separates oxidation, creep, fatigue and corrosion questions |
| Acceptance | NDE, dimensions, surface, representative tests | Powder acceptance does not qualify the component |
Published oxidation or tensile values cannot be transferred without the material condition and test environment. Ask whether data are as-built, heat treated, HIPed or machined, and in which orientation. For combustor or burner duty, separate steady temperature from thermal cycling and local flame exposure.
RFQ fields
Provide the component, hot-gas composition, temperature-time cycle, pressure, load, cooling, machine and process, target PSD, quantity, thermal route and inspection requirements. For a regulated or flight program, state the governing qualification basis. Send an Alloy X powder inquiry.