Incoloy 890 Sheets | UNS N08890 High Temperature Alloy for Boilers, Heaters & Furnaces
When a large waste‑to‑energy plant in Europe pushed its boiler outlet above 1100°C to burn lower‑grade fuels, conventional stainless and standard Incoloy 800H/800HT tube sheets began to warp, oxidize, and crack in less than a year, forcing shutdowns that cost millions in lost power revenue and penalties. After upgrading critical hot surfaces to Incoloy 890 Sheets (UNS N08890), wall loss dropped dramatically and inspection intervals stretched beyond three years, giving engineers and procurement teams the confidence to run hotter, longer, and more efficiently.
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This is exactly the scenario facing chemical, oil & gas, marine, pharma, and power generation facilities that are raising firing temperatures, changing fuels, or extending run lengths: the traditional heat‑resistant alloys that worked at 850–950°C no longer deliver safe margins at 1050–1150°C, and each unexpected tube sheet failure or furnace panel distortion becomes a direct hit to EBITDA.
Incoloy 890 was engineered as a nickel‑iron‑chromium alloy with about 43% Ni and 25% Cr plus additions of molybdenum, niobium, and silicon to offer high strength along with excellent resistance to oxidation, carburization, and sulfidation up to about 1200°C, outperforming classic 800H/800HT in creep and stress‑rupture while maintaining good fabricability for plates, sheets, and tubes.
Aurico Alloys LLP supplies affordable, best‑quality, authentic Incoloy 890 Sheets as a trusted supplier, stockist, manufacturer‑backed processor, and exporter from India to abroad, supporting EPCs, OEMs, fabricators, hardware and industrial supply stores that serve high‑temperature process, refinery, power and marine projects where unplanned outages are no longer acceptable.
High-quality Incoloy 890 Sheets ready for industrial use.
Incoloy 890 Sheets Specification Overview
| Supplier / Role | Aurico Alloys LLP – Incoloy 890 Sheets supplier, stockist & exporter from India to global projects |
|---|---|
| Alloy Name | Incoloy 890 high‑temperature alloy |
| UNS Number | N08890 |
| Reference ASTM Standard | ASTM B409 for bars/rods of UNS N08890 (used as reference for chemistry & mechanical properties; plates/sheets supplied to equivalent UNS N08890 requirements) |
| Typical Product Forms | Sheets, plates, profiled cut panels, fabricated components |
| Thickness Range (typical) | 3 mm – 40 mm for plates; thinner gauges on enquiry for sheet‑type panels |
| Width Range | 800 mm – 2500 mm, depending on mill route |
| Length Range | 2000 mm – 12000 mm or cut‑to‑size for tube sheets and furnace walls |
| Typical Delivery Condition | Hot rolled, solution annealed, shot‑blasted or machined, with fully traceable mill test certificates |
Equivalent Grades, UNS & ASTM References
| Property | Value |
|---|---|
| UNS number | N08890 |
| Werkstoff / EN number | — |
| EN designation | — |
| Density | 7.94 g/cm3 |
| Melting range | 1309-1383 °C |
| Plate, sheet and strip specification | ASTM B409 / B906 |
Identifiers and physical constants for Incoloy 890. A dash means no such designation is published for this grade.
Stock & Product Availability
Incoloy 890 is intended for extreme high‑temperature environments where long‑term section stability matters more than light‑weighting. For procurement heads and industrial distributors, this translates into heavy‑duty plates and cut sheets that can replace weaker stainless or standard Incoloy grades in existing layouts without a full redesign.
Aurico Alloys LLP can offer mill‑sized plates for OEM fabrication, along with pre‑cut, machined tube sheets and panels supplied with EN 10204/3.1 certification, chemistry and mechanical test reports aligned to UNS N08890 / ASTM B409 requirements, and optional PMI for critical energy, refinery, and chemical projects.
Chemical Composition (UNS N08890)
| Element | Min (%) | Max (%) |
|---|---|---|
| Nickel (Ni) | 42.5 nominal | |
| Chromium (Cr) | 25 nominal | |
| Iron (Fe) | — | Balance |
| Aluminium (Al) | 0.1 nominal | |
| Niobium (Nb) | 0.4 nominal | |
| Titanium (Ti) | — | 1 |
| Carbon (C) | 0.1 nominal | |
| Manganese (Mn) | — | 1 |
| Silicon (Si) | 1.8 nominal | |
| Phosphorus (P) | — | 0.03 |
| Sulfur (S) | — | 0.015 |
| Copper (Cu) | — | 0.75 |
| Molybdenum (Mo) | 1.5 nominal | |
| Tantalum (Ta) | 0.2 nominal | |
Composition for Incoloy 890. Figures given as a range or a maximum are limits and those marked nominal are not; none of them are measured values for a lot; the mill test certificate supplied with your order states the actual analysis.
Mechanical & High Temperature Properties
| Property | Typical Behaviour | Comment |
|---|---|---|
| Room‑Temperature Strength | Comparable to or slightly higher than Incoloy 800HT in tensile and yield | Good fabrication and handling strength for sheets/plates |
| Creep & Stress‑Rupture | Creep/stress‑rupture data indicate performance similar to alloy 803 and higher than 800HT at high temperature | Critical for heater, boiler, reformer and furnace designs above ~980°C |
| Service Temperature | Up to about 1200°C (2200°F) in oxidizing, carburizing, and sulfidizing gases | Suitable for very hot furnace walls, tube sheets, and shields |
| Oxidation / Carburization / Sulfidation | Laboratory tests show significantly better resistance than Incoloy 800HT and 803 in aggressive mixed atmospheres | Reduces scale loss, carbon pick‑up and sulfidation cracking vs older grades |
Applications & Industry Benefits
- Chemical & Petrochemical: Radiant/convection section plates, tube sheets, and baffles in high‑temperature heaters, crackers, and reformers where carburization and sulfidation from process gas or fuel cause rapid failure of 800H/800HT or stainless alloys.
- Oil & Gas & Refining: Furnace wall panels, burner tiles and shields, and high‑temperature duct components in hydrocarbon processing units that run hotter for higher throughput or to handle heavier feeds.
- Power Generation & Waste‑to‑Energy: Superheater and reheater casings, boiler shields, and incinerator linings facing mixed oxidizing, sulfidizing and carburizing flue gases at 1000–1150°C.
- Marine & Offshore: High‑temperature exhaust ducting and flare or burner assemblies for FPSOs and offshore platforms using sour or high‑sulfur fuels.
- Pharma & Specialty Process: Thermal treatment and calcination equipment where stable, clean high‑temperature surfaces protect product quality and reduce downtime.
- Fabricators, OEMs & Hardware / Industrial Supply Stores: Ready‑stock sheets and plates enable rapid upgrades of critical hot sections without changing entire equipment designs, offering a clear value‑add for end users compared with standard stainless or lower‑grade Incoloy materials.
FAQ & Search Trends
Global Export Destinations
We ship worldwide from Mumbai. See every destination we export to on our export markets page.
Domestic Supply Network
We deliver across India from our Mumbai stockyard. See every city we supply on our supply locations page.
Conclusion
Incoloy 890 Sheets (UNS N08890) give procurement heads, engineers, fabricators, OEMs and industrial supply stores a robust, specification‑backed way to push temperatures higher and outages lower by combining high‑temperature strength, oxidation/carburization/sulfidation resistance and reliable certification that older stainless and Incoloy grades cannot match so will your next high‑temperature chemical, oil & gas, marine, pharma or power project be protected by the margin that Incoloy 890 brings?