Nimonic Plates for Critical High-Temperature Service | Why Turbine, Furnace & Process Engineers Move Beyond Stainless
Table of Contents:
At a combined-cycle power plant, repeated creep cracking in 310S stainless hot ducting and burner tiles forced shutdowns every 9–12 months, cutting plant availability below 90% and driving maintenance budgets into the red. The turning point came when the OEM upgraded the hot gas path baffles and transition pieces to Nimonic 75 Plates (UNS N06075), a nickel–chromium superalloy that maintains strength and oxidation resistance to around 1000°C and offers creep-rupture strengths above 80 MPa at 650°C for 1000 hours, restoring availability above 98% and stretching outage intervals to more than three years.
For procurement heads, process and maintenance engineers, fabricators, OEMs, and hardware or industrial supply stores in chemical, oil & gas, marine, pharma, and power generation, Nimonic plates provide a step-change over stainless and basic nickel alloys. Nimonic 75, an approximately 80/20 nickel–chromium alloy with titanium and carbon additions, combines good corrosion and oxidation resistance with high-temperature strength and creep resistance, making it ideal for components exposed to sustained stress in hot gas paths, reformers, incinerators, and furnace roofs where 304/316/310 steels lose strength rapidly.
Aurico Alloys LLP supports such demanding projects as a trusted Nimonic Plates supplier, manufacturer, and stockist in India with export to global hubs, providing affordable, authentic plate material supported by heat treatment control, mechanical testing, and documentation that aligns with gas turbine, industrial furnace, and high-temperature code expectations. Hardware and industrial supply outlets can stock Nimonic 75 thin gauge sheet and Nimonic 75 shim stock for burner tiles, seal strips, and hot brackets alongside Incoloy and stainless options, enabling them to serve both MRO and new-build requirements.
The same buyers who search for “Nimonic 75 sheets supplier”, “Nimonic 75 stockist”, “Nimonic 75 exporter”, “UNS N06075 sheet price”, “BS HR 203 Nimonic 75 sheet”, “Nimonic 75 sheet cut to size”, “Nimonic 75 thin gauge sheet”, “Nimonic 75 shim stock”, “Nimonic 75 ready stock India”, “Nimonic 75 plate immediate delivery”, and “Global Nimonic 75 supplier” often also require corrosion-resistant structural plates. Aurico Alloys LLP complements Nimonic plates with Incoloy plates as a parallel product line, acting as an Incoloy plates supplier, stockist, and exporter in India to abroad for bundle packages where Nimonic handles the hottest, most stressed components while Incoloy covers vessel shells, tube sheets, and ducting.
High-quality Nimonic Plates ready for industrial use.
Specification Overview
| Supplier & Manufacturer | Aurico Alloys LLP – Nimonic plates supplier, stockist, exporter in India to abroad |
|---|---|
| Representative Grade | Nimonic 75 (UNS N06075), also designated 2.4951 / 2.4630, BS HR 203 |
| Product Forms | Plates, sheets, strips, and shims for high-temperature service |
| Standards (typical) | BS HR 203 (sheet/plate), DIN 17750/17752 (sheet/plate/bars), relevant ASTM/AMS specifications for Nimonic-type alloys |
| Thickness Range | 4.75 mm – 150 mm |
| Heat Treatment | Typically solution-annealed plus controlled aging or annealed-only depending on application and required properties |
| Price | INR 1,200 – 10,000 per kg. Indicative USD 14 – 118 per kg; quoted against grade, form, size and quantity. |
Nimonic Plate Grades Supplied
Each grade below has its own plate page carrying that grade’s size range, properties and the specification written for it. Nimonic 115 and 901 are not made in this form; their own pages list the forms they are supplied in.
| Grade | Chosen for |
|---|---|
| Nimonic 75 Plates | Oxidation resistance with good formability and weldability |
| Nimonic 80A Plates | The original turbine blade alloy; strength at temperature |
| Nimonic 81 Plates | Resistance to high-temperature corrosion |
| Nimonic 86 Plates | Molybdenum-bearing, for strength without age hardening |
| Nimonic 90 Plates | Cobalt added over the 80A base for higher creep strength |
| Nimonic 105 Plates | Higher operating temperature than 90 |
| Nimonic 263 Plates | Age hardened but picked for weldability, so it suits sheet fabrications |
UNS & Equivalent Grades
Nimonic 75
| Property | Value |
|---|---|
| UNS number | N06075 |
| Werkstoff / EN number | 2.4951 / 2.4630 |
| Density | 8.37 g/cm3 |
| Melting range | 1340-1380 °C |
| Specific heat (20 °C) | 461 J/kg·°C |
| Thermal conductivity (20 °C) | 11.7 W/m·°C |
| Electrical resistivity (20 °C) | 1.09 µΩ·m |
| Plate, sheet and strip specification | BS HR 203 / DIN 17750 / ISO 6208 |
Identifiers and physical constants for Nimonic 75. A dash means no such designation is published for this grade.
Nimonic 80A
| Property | Value |
|---|---|
| UNS number | N07080 |
| Werkstoff / EN number | 2.4952 / 2.4631 |
| EN designation | NiCr20TiAl |
| Density | 8.19 g/cm3 |
| Melting range | 1320-1365 °C |
| Mass susceptibility (at 1000 gauss) | 5.85 × 10⁻⁶ |
| Volume susceptibility (at 1000 gauss) | 4.78 × 10⁻⁶ |
| Magnetic permeability (for 200-2000 oersted) | 1.000601 |
| Thermal conductivity (20 °C) | 11.2 W/m·°C |
| Electrical resistivity (20 °C) | 1.2 µΩ·m |
| Coefficient of expansion (20-100 °C) | 12.7 µm/m·°C |
| Plate, sheet and strip specification | BS HR 201 / AECMA PrEn 2191 / DIN EN 10302 |
Identifiers and physical constants for Nimonic 80A. A dash means no such designation is published for this grade.
Nimonic 81
| Property | Value |
|---|---|
| UNS number | — |
| Density | 8.06 g/cm3 |
| Melting range | 1305-1375 °C |
| Specific heat (20 °C) | 461 J/kg·°C |
| Thermal conductivity (20 °C) | 10.9 W/m·°C |
| Electrical resistivity (20 °C) | 1.27 µΩ·m |
| Coefficient of expansion (20-100 °C - extruded and stretched bar) | 11.1 µm/m·°C |
| Coefficient of expansion (20-100 °C - cold rolled sheet) | 11.7 µm/m·°C |
| Dynamic modulus of elasticity (20 °C - extruded bar) | 196 GPa |
| Dynamic modulus of elasticity (20 °C - sheet) | 212 GPa |
| Modulus of rigidity (20 °C - dynamic torsional) | 80 GPa |
| Plate, sheet and strip specification | Mill specification |
Identifiers and physical constants for Nimonic 81. A dash means no such designation is published for this grade.
Nimonic 86
| Property | Value |
|---|---|
| UNS number | — |
| Density | 8.54 g/cm3 |
| Young's modulus (20 °C - dynamic) | 210 GPa |
| Plate, sheet and strip specification | Mill specification |
Identifiers and physical constants for Nimonic 86. A dash means no such designation is published for this grade.
Nimonic 90
| 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.
Nimonic 105
| Property | Value |
|---|---|
| UNS number | — |
| Werkstoff / EN number | 2.4634 |
| EN designation | — |
| Density | 8.01 g/cm3 |
| Melting range | 1290-1345 °C |
| Electrical resistivity (20 °C) | 131 µΩ·cm |
| Magnetic permeability (0.02 T - 0.2 T) | 1.000715 |
| Plate, sheet and strip specification | BS HR 3 |
Identifiers and physical constants for Nimonic 105. A dash means no such designation is published for this grade.
Nimonic 263
| Property | Value |
|---|---|
| UNS number | N07263 |
| Werkstoff / EN number | 2.4650 |
| Density | 8.36 g/cm3 |
| Melting range | 1300-1355 °C |
| Specific heat | 461 J/kg·°C |
| Plate, sheet and strip specification | AMS 5872 / BS HR 206 / DIN 17750 |
Identifiers and physical constants for Nimonic 263. A dash means no such designation is published for this grade.
Stock & Product Availability
As a Nimonic plates stockist, Aurico Alloys LLP focuses on plate and sheet sizes used in burner tiles, transition pieces, hot brackets, and furnace roofs, combined with Nimonic 75 sheet cut to size and Nimonic 75 shim stock for sealing, shimming, and flexible components. This lets procurement teams replace or redesign failing stainless components with superalloy solutions without committing to excessive mill quantities.
For export-led projects, Aurico can bundle Nimonic plates with Incoloy plate packages so EPCs and OEMs dealing in chemical, oil & gas, marine, pharma, and power systems can source both high-temperature superalloy plates and corrosion-resistant structural plates from a single, documentation-focused Incoloy plates supplier, stockist, and exporter in India.
Chemical Composition
Nimonic 75
| Element | Min (%) | Max (%) |
|---|---|---|
| Nickel (Ni) | — | Balance |
| Chromium (Cr) | 18.0 | 21.0 |
| Titanium (Ti) | 0.2 | 0.6 |
| Carbon (C) | 0.08 | 0.15 |
| Iron (Fe) | — | 5.0 |
| Manganese (Mn) | — | 1.0 |
| Silicon (Si) | — | 1.0 |
| Copper (Cu) | — | 0.5 |
Composition limits for Nimonic 75. 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.
Nimonic 80A
| Element | Min (%) | Max (%) |
|---|---|---|
| Carbon (C) | — | 0.10 |
| Chromium (Cr) | 18.0 | 21.0 |
| Silicon (Si) | — | 1.0 |
| Copper (Cu) | — | 0.2 |
| Iron (Fe) | — | 3.0 |
| Manganese (Mn) | — | 1.0 |
| Titanium (Ti) | 1.8 | 2.7 |
| Aluminium (Al) | 1.0 | 1.8 |
| Cobalt (Co) | — | 2.0 |
| Boron (B) | — | 0.008 |
| Zirconium (Zr) | — | 0.15 |
| Lead (Pb) | — | 0.0025 |
| Sulfur (S) | — | 0.015 |
| Nickel (Ni) | — | Balance |
Composition limits for Nimonic 80A. 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.
Nimonic 81
| Element | Min (%) | Max (%) |
|---|---|---|
| Carbon (C) | 0.05 nominal | |
| Silicon (Si) | 0.50 nominal | |
| Copper (Cu) | 0.20 nominal | |
| Iron (Fe) | 1.0 nominal | |
| Manganese (Mn) | 0.50 nominal | |
| Chromium (Cr) | 30.0 nominal | |
| Titanium (Ti) | 1.8 nominal | |
| Aluminium (Al) | 0.9 nominal | |
| Cobalt (Co) | 2.0 nominal | |
| Molybdenum (Mo) | 0.30 nominal | |
| Boron (B) | 0.003 nominal | |
| Zirconium (Zr) | 0.06 nominal | |
| Sulfur (S) | 0.015 nominal | |
| Nickel (Ni) | — | Balance |
Nominal composition for Nimonic 81. These are nominal figures rather than acceptance limits, and they are not measured values for a lot; the mill test certificate supplied with your order states the actual analysis.
Nimonic 86
| Element | Min (%) | Max (%) |
|---|---|---|
| Carbon (C) | 0.05 nominal | |
| Chromium (Cr) | 25.0 nominal | |
| Molybdenum (Mo) | 10.0 nominal | |
| Magnesium (Mg) | 0.015 nominal | |
| Cerium (Ce) | 0.03 nominal | |
| Nickel (Ni) | — | Balance |
Nominal composition for Nimonic 86. These are nominal figures rather than acceptance limits, and they are not measured values for a lot; the mill test certificate supplied with your order states the actual analysis.
Nimonic 90
| 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.
Nimonic 105
| Element | Min (%) | Max (%) |
|---|---|---|
| Carbon (C) | — | 0.17 |
| Silicon (Si) | — | 1.0 |
| Copper (Cu) | — | 0.2 |
| Iron (Fe) | — | 1.0 |
| Manganese (Mn) | — | 1.0 |
| Chromium (Cr) | 14.0 | 15.7 |
| Titanium (Ti) | 0.9 | 1.5 |
| Aluminium (Al) | 4.5 | 4.9 |
| Cobalt (Co) | 18.0 | 22.0 |
| Molybdenum (Mo) | 4.5 | 5.5 |
| Lead (Pb) | — | 0.0015 |
| Sulfur (S) | — | 0.010 |
| Boron (B) | 0.003 | 0.010 |
| Zirconium (Zr) | — | 0.15 |
| Nickel (Ni) | — | Balance |
Composition limits for Nimonic 105. 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.
Nimonic 263
| Element | Min (%) | Max (%) |
|---|---|---|
| Carbon (C) | 0.04 | 0.08 |
| Silicon (Si) | — | 0.40 |
| Manganese (Mn) | — | 0.60 |
| Sulfur (S) | — | 0.007 |
| Silver (Ag) | — | 0.0005 |
| Aluminium (Al) | — | 0.60 |
| Boron (B) | — | 0.005 |
| Bismuth (Bi) | — | 0.0001 |
| Cobalt (Co) | 19.0 | 21.0 |
| Chromium (Cr) | 19.0 | 21.0 |
| Copper (Cu) | — | 0.20 |
| Iron (Fe) | — | 0.7 |
| Molybdenum (Mo) | 5.6 | 6.1 |
| Lead (Pb) | — | 0.0020 |
| Titanium (Ti) | 1.9 | 2.4 |
| Aluminium + Titanium (Al+Ti) | 2.4 | 2.8 |
| Nickel (Ni) | — | Balance |
Composition limits for Nimonic 263. 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 (Nimonic 75 Plate/Sheet) |
|---|---|
| Melting Range | ≈1340–1380°C |
| Tensile Strength (Room Temp) | ≈650–800 MPa (≈95–116 ksi) |
| 0.2% Proof / Yield Strength | ≈240–275 MPa |
| Elongation | ≈25–42 % |
| Recommended Operating Temp (general) | Roughly −200°C to +1000°C depending on load and environment |
| Creep / Stress-Rupture (indicative) | At 650°C, 1000 h rupture stress around 80–85 MPa for Nimonic 75 sheet |
Applications & Benefits
- Chemical & Oil & Gas: Nimonic plates in burner quarls, reformer furnace roofs, and hot support brackets retain strength and resist oxidation where 310S or 253MA plates creep or scale, lowering unplanned outages and inspection frequency in fired heaters and incinerators.
- Marine & Power: In naval turbines, marine incinerators, and combined-cycle HRSG ducting, Nimonic 75’s high-temperature strength and oxidation resistance help maintain geometry and sealing surfaces under cyclic thermal loading, outperforming conventional stainless steels.
- Pharma & High-Clean Environments: In specialty pharma and fine chemicals, Nimonic plates and thin sheet can be used in high-temperature sterilizers, thermal oxidizers, and off-gas treatment where clean, scale-resistant surfaces and mechanical stability are essential.
- Hardware & Industrial Supply: Stocking Nimonic 75 thin gauge sheet, Nimonic 75 shim stock, and plate allows hardware and MRO distributors to respond immediately to breakdowns in turbines and furnaces, while Incoloy plate options address the associated ducting, shells, and tubesheets for a complete, specification-driven package.
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 plates from Aurico Alloys LLP, built around proven UNS N06075 chemistry and supported by international standards like BS HR 203 and DIN 2.4951, give chemical, oil & gas, marine, pharma, and power users a superalloy platform that finally aligns hot-section reliability with process uptime are your most temperature-critical turbines, furnaces, and incinerators still relying on borderline stainless steels instead of Nimonic plates engineered for this duty?