When a gas turbine manufacturer faced critical failures in engine rings operating above 600°C, the solution wasn’t another round of expensive maintenance but a shift to Nimonic 901 Round Bars. Developed for elevated temperature applications, Nimonic 901 is now the preferred choice for procurement teams and engineers across oil & gas, marine, power, pharma, and chemical sectors, offering certified supply, verified stats, and lifecycle benefits few alloys can match.
Table of Contents:
Nimonic 901 (UNS N09901, Werkstoff 2.4662, AMS 5660/5661, AMS 5660 / 5661) is an age-hardenable nickel-iron-chromium superalloy with substantial molybdenum, titanium, and aluminum. It is valued for ultimate yield strength, toughness, creep resistance up to 600°C, and excellent corrosion protection in jet engine, refinery, turbine, and marine settings. Its structure, reinforced by Ti and Al, delivers predictable hardening and stress resistance where other alloys fade.
Available in round bars from 5 to 200mm diameter, each batch is supplied to AMS 5660 / 5661, DIN and ISO standards with full MTC documentation for vital traceability. Providers of Nimonic 901 Round Bars and Inconel 718 Round Bars offer rapid global supply, certified packaging, and customized sizes for urgent projects and plant shutdowns.
High-quality Nimonic 901 Round Bars ready for industrial use.
Specification Overview
| Grade | Nimonic 901 (UNS N09901, W. Nr. 2.4662) |
|---|---|
| Standards | AMS 5660, AMS 5661, AECMA PrEN 2176 & 2177, ISO 9723, ISO 9725, W.Nr. 2.4662 |
| Diameter Range | 5–200 mm |
| Length | 100–6000 mm |
| Finish | Bright, ground, rough-turned |
| Delivery | Certified export, full MTC, custom packaging |
Equivalent Grades & Standards
| Property | Value |
|---|---|
| UNS number | N09901 |
| Werkstoff / EN number | 2.4662 |
| Density | 8.14 g/cm3 |
| Melting range | 1280-1345 °C |
| Specific heat (20 °C) | 431 J/kg·°C |
| Electrical resistivity (20 °C) | 112 µΩ·cm |
| Coefficient of expansion (20-100 °C) | 13.5 µm/m·°C |
| Rod and bar specification | AMS 5660 / 5661 / ISO 9723 |
Identifiers and physical constants for Nimonic 901. A dash means no such designation is published for this grade.
Stock & Product Availability
Key diameters of Nimonic 901 round bars are available for immediate supply worldwide; stockists support rapid turnaround for industrial maintenance, OEM builds, and chemical or energy projects.
Chemical Composition
| Element | Min (%) | Max (%) |
|---|---|---|
| Nickel (Ni) | 42.5 nominal | |
| Chromium (Cr) | 12.5 nominal | |
| Molybdenum (Mo) | 5.75 nominal | |
| Titanium (Ti) | 2.9 nominal | |
| Cobalt (Co) | — | 1.0 |
| Copper (Cu) | — | 0.5 |
| Manganese (Mn) | — | 0.5 |
| Silicon (Si) | — | 0.4 |
| Aluminium (Al) | — | 0.35 |
| Carbon (C) | — | 0.1 |
| Sulfur (S) | — | 0.03 |
| Iron (Fe) | — | Balance |
Composition for Nimonic 901. 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 & Physical Properties
| Property | Typical Value |
|---|---|
| Tensile Strength (MPa) | 725–1200 |
| Yield Strength (0.2%, MPa) | 635–1000 |
| Elongation (%) | 12–19 |
| Hardness (HB) | 302–388 |
| Max. Service Temp (°C) | 593–600 |
Applications & Benefits
Why this grade
Nimonic 901 substitutes a large iron fraction for nickel and is age-hardened with titanium, which makes it materially cheaper than the fully nickel-base grades. It is a forging alloy for turbine discs, shafts and rings running to around 600°C, where the higher-temperature capability of 90 or 105 would simply go unused.
- Chemical: gas reaction rings, furnace tubes, refinery seals.
- Marine: shaft seals, engine disc rings, corrosion-exposed fasteners.
- Oil & Gas: turbine engine discs, casing, shafts.
- Pharma: process plant springs, sterilizer valve bars.
- Power Generation: generator rings, steam turbine casings, high-temperature bolting.
- Hardware/OEM: custom nonmagnetic fasteners, high-strength round rods.
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 Across India
We deliver across India from our Mumbai stockyard. See every city we supply on our supply locations page.
Conclusion
Nimonic 901 Round Bars are setting new benchmarks for reliability, machinability, and strength in chemical, marine, energy, hardware, and oil & gas sectors. Are your plants protected by the world's leading nickel superalloy?