Hastelloy® N Plates | UNS N10003 Ni‑Mo‑Cr Plates for Molten Salt, Nuclear, Chemical & High-Temperature Service
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When a clean‑energy developer in India upgraded its pilot molten salt reactor (MSR) loop and thermal energy storage system, the first construction round used a mix of “high‑temperature” stainless steels and generic nickel alloys that looked economical on paper but began to show unexpected scaling, intergranular attack and cracking in fluoride‑based salt channels well before long‑duration tests were complete. The second iteration was built around Hastelloy® N Plates (UNS N10003), the same Ni‑Mo‑Cr alloy originally developed at Oak Ridge National Laboratory as a container material for molten fluoride salts, where data show minimum plate tensile strength about 690 MPa, 0.2% yield strength about 280–310 MPa, elongation at least 40–45% and corrosion rates in molten LiF‑BeF₂ fuel salt at 700 °C below about 0.025 mm/year and in NaBF₄‑NaF coolant salt at 607 °C around 0.015 mm/year; after thousands of test hours, wall thickness loss remained in the tens of microns per year instead of the hundreds of microns seen in earlier alloys, giving procurement and safety teams real confidence in MSR and thermal storage hardware.
HASTELLOY® N alloy (UNS N10003), also known as Alloy N or INOR‑8, is a nickel‑based Ni‑Mo‑Cr alloy designed specifically as a container material for molten fluoride salts in molten salt reactors and related high‑temperature systems. Producer literature notes that it has good oxidation resistance to hot fluoride salts in the temperature range of about 1300–1600 °F (704–871 °C) and that tests exceeding two years in molten fluoride salts at temperatures up to about 1300 °F (704 °C) showed corrosion attack of less than one mil per year (≈0.025 mm/year), supporting its use in long‑life nuclear and energy systems.
For procurement heads, nuclear and process engineers, fabricators, OEMs and hardware or industrial supply stores, Hastelloy N plates offer a very rare combination: excellent compatibility with hot fluoride salts and halides (LiF‑BeF₂, NaBF₄‑NaF and other Zr, Be, Li, Na, K, Th or U halides), good resistance to aging and embrittlement, and mechanical strength optimised for long‑term service at temperatures up to around 600–704 °C under ASME code rules. Data from plate suppliers and technical summaries list plate mechanical properties per ASTM B434 as minimum tensile strength about 690 MPa, minimum yield strength around 280 MPa, minimum elongation around 40–45% and hardness typically in the Rockwell B range below about 90–95, with face‑centred cubic microstructure providing high ductility and stability under thermal stress.
Aurico Alloys LLP can support these projects as an affordable, authentic Hastelloy® N Plates supplier, manufacturer and stockist in India with exports abroad, stocking hot‑rolled Hastelloy N plates and cut‑to‑size plate for molten salt reactor components, fluoride‑handling equipment, industrial furnaces, aerospace test rigs and high‑temperature chemical processes, produced to UNS N10003 in accordance with ASTM B434 / ASME SB434 and supplied with EN 10204 3.1 Mill Test Certificates. This offering aligns closely with search intent such as “Hastelloy N plate suppliers in Mumbai for molten salt reactor (MSR) components”, “ASME SB434 Hastelloy N plates for high‑temperature nuclear power generation”, “Fluoride salt resistant Hastelloy N plates for clean energy technology in India”, “Hastelloy N plate price in Mumbai for thermal energy storage system fabrication”, “Hastelloy N plate stockist in Mumbai for high‑temperature fluoride handling equipment”, “UNS N10003 Hastelloy N plate exporters in Mumbai serving global chemical refineries”, “Hastelloy N hot rolled plates in India for heavy‑duty industrial furnaces” and “Leading Hastelloy N alloy plate dealers in Mumbai for aerospace and defense manufacturing”.
High-quality Hastelloy® N Plates ready for industrial use.
Specification Overview
| Supplier & Role | Aurico Alloys LLP – Hastelloy N plate suppliers in Mumbai for molten salt reactor (MSR) components, fluoride‑handling equipment, heavy‑duty industrial furnaces and aerospace/defence fabrication, with verified MTCs for Indian and export projects. |
|---|---|
| Alloy Description | Ni‑Mo‑Cr corrosion‑resistant alloy developed at Oak Ridge National Laboratory as a container material for molten fluoride salts, optimised for long‑term service in MSRs and hot fluoride environments. |
| UNS / Werkstoff / EN | UNS N10003; frequently referenced in specifications as Alloy N or NiMo17Cr17, with plate produced under ASTM B434 / ASME SB434. |
| Main Plate Standards | ASTM B434 / ASME SB434 for plate; dimensional tolerances often per ASTM B906; alloy accepted for ASME Section VIII service up to about 1300 °F (704 °C) under Case 1315. |
| Thickness Range | 4.75 mm – 150 mm |
| Physical Data | Density about 8.86–9.19 g/cm³; melting range about 1300–1400 °C; thermal conductivity increasing from about 13.1 W/m·K at 200 °C to about 23.6 W/m·K at 700 °C; coefficient of thermal expansion to 900 °C about 14.9 μm/m·K. |
| Corrosion Focus | Excellent oxidation resistance and very low corrosion rates in hot fluoride salts such as LiF‑BeF₂ and NaBF₄‑NaF, along with good performance in various halide and chemical process environments. |
UNS & Equivalent Grades
| Property | Value |
|---|---|
| UNS number | N10003 |
| Density | 8.86 g/cm3 |
| Melting range | 1300-1400 °C |
| Thermal conductivity (200 °C) | 13.1 W/m·°C |
| Coefficient of expansion (20-200 °C) | 12.3 µm/m·°C |
| Electrical resistivity (20 °C) | 120.5 µΩ·cm |
| Dynamic modulus of elasticity (20 °C) | 219 GPa |
| Plate, sheet and strip specification | ASTM B434 / AMS 5607 |
Identifiers and physical constants for Hastelloy N. A dash means no such designation is published for this grade.
Stock & Product Availability
As ASME SB434 Hastelloy N plate stockist in Mumbai for high‑temperature nuclear and thermal energy projects, Aurico Alloys LLP can supply hot‑rolled plates, and plates flattened and cut from coil, from 4.75 mm to 150 mm thick, in widths and lengths tailored to reactor vessels, heat exchangers, tanks and furnace shells. Typical plate mechanical properties according to ASTM B434 include minimum tensile strength of 690 MPa, minimum yield strength of 280 MPa, minimum elongation of 40–45% and hardness in the Rockwell B range below about 90–95, providing robust margins for primary‑loop MSR components and high‑temperature chemical equipment.
This product mix supports search themes such as “Hastelloy N plate price in Mumbai for thermal energy storage system fabrication”, “Hastelloy N plate stockist in Mumbai for high‑temperature fluoride handling equipment”, “Industrial grade Hastelloy N plates for aging and embrittlement resistant applications”, “UNS N10003 Hastelloy N plate exporters in Mumbai serving global chemical refineries”, “Hastelloy N hot rolled plates in India for heavy‑duty industrial furnaces” and “Leading Hastelloy N alloy plate dealers in Mumbai for aerospace and defense manufacturing”, ensuring procurement heads and hardware or industrial supply stores can find both standard sizes and custom‑cut plates with full Mill Test Certificates (MTCs).
Chemical Composition
| Element | Min (%) | Max (%) |
|---|---|---|
| Nickel (Ni) | — | Balance |
| Molybdenum (Mo) | 15 | 18 |
| Chromium (Cr) | 6 | 8 |
| Iron (Fe) | — | 5 |
| Tungsten (W) | — | 0.5 |
| Vanadium (V) | — | 0.5 |
| Aluminium (Al) | — | 0.5 |
| Copper (Cu) | — | 0.35 |
| Cobalt (Co) | — | 0.2 |
| Carbon (C) | — | 0.08 |
| Manganese (Mn) | — | 1 |
| Silicon (Si) | — | 1 |
Composition limits for Hastelloy N. 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 (Plate, Solution Treated / Standard Condition) | Typical Value – Hastelloy N / UNS N10003 |
|---|---|
| Ultimate Tensile Strength (RT) | ≥690 MPa minimum per ASTM B434 plate data; typical values around or above this depending on product form. |
| 0.2% Yield Strength (RT) | ≥280 MPa minimum; some sheet/plate data show 310–380 MPa ranges for yield strength. |
| Elongation | ≥40–45% minimum; some references list elongation up to about 65% for particular products. |
| Hardness | Typically ≤Rockwell B 90–95 or Brinell values corresponding to a ductile, solution‑strengthened plate. |
| Modulus of Elasticity | ≈207 GPa at room temperature. |
| Thermal Conductivity | Rises from ≈13.1 W/m·K at 200 °C to ≈20.3 W/m·K at 600 °C and ≈23.6 W/m·K at 700 °C. |
| Fluoride Salt Corrosion Rate | In LiF‑BeF₂ fuel salt at 700 °C, corrosion rate <0.025 mm/year; in NaBF₄‑NaF coolant salt at 607 °C, corrosion ≈0.015 mm/year, with long‑term tests in molten fluoride salts at up to 704 °C showing attack less than one mil/year. |
| Aging & Embrittlement Resistance | Described as having good resistance to aging and embrittlement, with welded joints showing stable mechanical performance from about 650–725 °C in elevated‑temperature testing. |
Applications & Benefits
Why this grade
Hastelloy N is a nickel-molybdenum-chromium alloy developed for molten fluoride salts at the Oak Ridge Molten-Salt Reactor Experiment, and it is still the grade specified for molten fluoride salt and hot hydrofluoric acid service. It is not a general-purpose aqueous corrosion alloy — for acid plant the B and C grades apply.
- Molten Salt Reactors & Clean Energy: Hastelloy N plates are the reference material for molten salt reactor primary‑loop components, including vessels, piping and high‑heat exchangers, with fluoride salt resistance supporting “Fluoride salt resistant Hastelloy N plates for clean energy technology in India” and “ASME SB434 Hastelloy N plates for high‑temperature nuclear power generation”.
- Chemical & Petrochemical: Corrosion‑resistant Hastelloy N alloy plates are used for chemical processing in Maharashtra and beyond in fluoride‑containing and high‑temperature halide environments, with Mumbai stockists supplying plates for high‑temperature fluoride handling equipment and industrial‑grade plates for aging‑ and embrittlement‑resistant applications in reactors and transfer lines.
- Marine, Oil & Gas: Marine‑grade Hastelloy N plates support specialised offshore high‑heat exchangers and subsea tools where hot brines or halides appear, while plate stockholders in India serve extreme sour‑gas environments and custom cut sizes for subsea oil and gas exploration tools where thermal cycles and aggressive species coexist.
- Pharma, Aerospace & General Sourcing: High‑purity Hastelloy N plates can be applied in pharmaceutical high‑temperature sterilisation units and high‑reliability aerospace and defence components, with verified exporters in Mumbai providing MTCs, hot‑rolled plates for heavy‑duty industrial furnaces and technical support to integrate Hastelloy N into broader alloy portfolios.
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
Hastelloy® N Plates from Aurico Alloys LLP, supplied to UNS N10003 / NiMo17Cr17 chemistry limits and ASTM B434 / ASME SB434 mechanical requirements with EN 10204 3.1 Mill Test Certificates, give chemical, oil & gas, marine, pharma, power‑generation and clean‑energy uses Ni‑Mo‑Cr plates that combine exceptional resistance to molten fluoride salts, good oxidation and aging resistance, stable high‑temperature strength and proven long‑life performance in MSR, thermal storage, fluoride handling, furnace and high‑reliability industrial service are your most severe molten‑salt, fluoride and high‑temperature assets still relying on conventional stainless and generic nickel alloys instead of optimised Hastelloy N plates?