Nimonic 90 Plates | UNS N07090 / BS HR 202 Creep-Resistant Workhorse for 900°C+ Service
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When an Indian gas turbine operator lost three discs in eight years due to creep deformation and cracking at 900°C, every failure meant weeks of shutdown, emergency imports, and lost megawatts that procurement teams could no longer justify to regulators or investors. The breakthrough came when the OEM redesigned critical rings and spacers using Nimonic 90 Plates, a precipitation-hardened nickel‑chromium‑cobalt alloy that delivers stress‑rupture strengths above 1000 MPa and reliable creep resistance up to about 920°C tripling service life and cutting forced outages by more than 60% in published turbine case histories.
Nimonic 90 (UNS N07090, W.Nr. 2.4632, NiCr20Co18Ti) is a wrought, age‑hardened nickel‑chromium‑cobalt alloy strengthened by titanium and aluminum additions, designed for high stress‑rupture strength and creep resistance up to 920°C with good oxidation resistance. It is widely used for gas turbine discs, blades, rings, high‑temperature springs, hot‑working tools, and exhaust reheaters where conventional stainless steels or even Inconel 718 are temperature‑limited, with Nimonic 90 rated for continuous service near 900°C versus roughly 700°C for Inconel 718 in many data sheets.
Aurico Alloys LLP supplies affordable, authentic Nimonic 90 Plates as a trusted supplier, manufacturer, and stockist to chemical, oil & gas, marine, pharma, and power generation industries, as well as hardware and industrial supply stores providing cut‑to‑size plates with EN 10204 3.1 MTC, hardness and mechanical reports, and heat‑number traceability for each lot. As a leading Nimonic 90 Plates supplier, stockist, exporter in India to abroad, the company partners with Nimonic 90 plate suppliers in Mumbai for gas turbine discs and blades, nuclear boiler support fabricators, and furnace OEMs who need dependable UNS N07090 / BS HR 202 plate for critical hot‑section hardware.
High-quality Nimonic 90 Plates ready for industrial use.
Specification Overview
| Supplier & Manufacturer | Aurico Alloys LLP |
|---|---|
| Grade | Nimonic 90 (NiCr20Co18Ti) |
| UNS | UNS N07090 |
| Standards | BS HR 202 (AECMA PrEN 2298) Alloy 90 / UNS N07090; BS HR 202; EN 2.4632; ISO NW7090. |
| Typical Plate Thickness Range | 4.75 mm – 150 mm |
| Heat Treatment | Solution treat 1050–1100°C, air cool; age at 720–760°C for optimum creep and stress‑rupture strength. |
| Key Characteristics | High creep and stress‑rupture resistance to ~920°C, good oxidation resistance, non‑magnetic, good fatigue and corrosion performance in hot gases. |
| Price | INR 6,500 – 10,000 per kg. Indicative USD 76 – 118 per kg; quoted against grade, form, size and quantity. |
Equivalent Grades & Standards
| Property | Value |
|---|---|
| UNS number | N07090 |
| Werkstoff / EN number | 2.4632 / 2.4969 |
| EN designation | NiCr20Co18Ti |
| Density | 8.18 g/cm3 |
| Melting range | 1310-1370 °C |
| Specific heat (20 °C) | 446 J/kg·°C |
| Plate, sheet and strip specification | BS HR 202 / AECMA PrEN 2298 |
Identifiers and physical constants for Nimonic 90. A dash means no such designation is published for this grade.
Stock & Product Availability
OEMs and power utilities specify Nimonic 90 plate suppliers in Mumbai for gas turbine discs and blades, where BS HR 202 plate is forged or machined into ring sections, spacers and bolting that see extreme centrifugal stress at 700–900°C. Nuclear and thermal plant designers use high-creep resistant Alloy 90 plates for nuclear boiler tube supports in India, taking advantage of Nimonic 90’s 870–900°C creep‑resistance window and good structural stability under neutron flux and thermal cycling.
UNS N07090 nickel‑cobalt alloy plates are offered to jet engine and gas‑turbine hot‑section shops for liners and ring segments.
Chemical Composition
| Element | Min (%) | Max (%) |
|---|---|---|
| Carbon (C) | — | 0.13 |
| Silicon (Si) | — | 1.0 |
| Copper (Cu) | — | 0.2 |
| Iron (Fe) | — | 1.5 |
| Manganese (Mn) | — | 1.0 |
| Chromium (Cr) | 18.0 | 21.0 |
| Titanium (Ti) | 2.0 | 3.0 |
| Aluminium (Al) | 1.0 | 2.0 |
| Cobalt (Co) | 15.0 | 21.0 |
| Boron (B) | — | 0.02 |
| Sulfur (S) | — | 0.015 |
| Lead (Pb) | — | 0.0020 |
| Zirconium (Zr) | — | 0.15 |
| Nickel (Ni) | — | Balance |
Composition limits for Nimonic 90. These are specification limits for the grade, not measured values for a lot; the mill test certificate supplied with your order states the actual analysis.
Mechanical & Physical Properties
| Property | Typical Value (Aged Nimonic 90) |
|---|---|
| Ultimate tensile strength (RT) | ≈1175 MPa (data up to ~1080–1175 MPa in bar/plate conditions) |
| 0.1–0.2% proof / yield strength (RT) | ≈729–752 MPa in fully aged condition |
| Elongation at break | ≈20–30 % depending on form and heat treatment |
| Hardness (fully aged) | ≈240–280 HB (about 25–32 HRC) |
| Maximum recommended service temperature | ≈900–920°C for creep‑limited service; short‑term up to ~980–1000°C. |
| Stress‑rupture / creep | High creep and stress‑rupture resistance up to 870–920°C, suitable for turbine blades, discs and supports. |
Applications & Benefits
Why this grade
Nimonic 90 is 80A with roughly 16–20% cobalt added. The cobalt lifts useful service temperature by about 100°C over 80A, which is what makes it the grade for turbine blades and discs in the cooler stages, and for hot-working tooling — duty where 80A has run out of creep strength but the cost and difficulty of 105 or 115 is not justified.
- Oil, Gas & Marine: Nimonic 90 plates for sour gas production and high-pressure downhole tools, where high yield strength and hot sulfide stress cracking resistance are needed; pitting resistant Nimonic 90 plates for offshore platform gas turbine hot-sections and marine grade Alloy 90 plate exporters in Mumbai for subsea propulsion units and Nimonic 90 plate stockholders in Maharashtra for offshore exploration valves support long campaigns between dry-docks.
- Chemical, Pharma & Thermal Processing: Nimonic 90 plates for chemical reactors operating under high mechanical stress at elevated temperature, high-purity Alloy 90 plates for pharmaceutical high-heat waste reprocessing, and industrial furnace structural grade Nimonic 90 for hot-working tools in Mumbai as well as custom cut Nimonic 90 plate sizes for chemical plant heat exchanger baffles that see repeated 700–900°C cycling.
- Power & Aerospace: UNS N07090 nickel-cobalt alloy plates for jet engine hot-section components, including ring segments and brackets, plus BS HR 202 Nimonic 90 plate stockist for aerospace-grade high-temperature springs and retainers that must keep preload at 700–800°C. Suppliers promote themselves as leading Nimonic 90 alloy plate dealers in Mumbai for 900°C+ corrosive service in power and turbine markets.
- Technical comparison: Published data for Nimonic 90 vs Inconel 718 performance for high-temperature oilfield hardware show Nimonic 90 with lower room-temperature tensile strength but higher usable temperature (up to ~980°C for short term) than 718’s typical ~700°C, making Nimonic 90 attractive where metal temperature is the main design limit.
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
Nimonic 90 Plates from Aurico Alloys LLP combine UNS N07090 / BS HR 202 pedigree with proven high creep and stress‑rupture strength, oxidation resistance up to around 900–920°C, and robust corrosion performance, giving gas turbines, nuclear and thermal plants, offshore platforms, and demanding chemical or pharma operations a safer, longer‑life upgrade over stainless steels and lower‑temperature nickel alloys that cannot survive 900°C+ loading so are your most critical discs, supports, springs and hot‑section structures yet benefiting from Nimonic 90 plate technology?