When a major gas turbine manufacturer faced repeated blade failures due to creep and thermal fatigue at temperatures exceeding 900°C, standard superalloys couldn't deliver the necessary performance. The breakthrough came with Nimonic Round Bars nickel-chromium-based superalloys engineered for extreme high-temperature strength and creep resistance. These bars transformed turbine reliability, eliminated costly failures, and extended component life significantly. Today, engineers and procurement teams in aerospace, power generation, chemical processing, oil & gas, and marine industries trust Nimonic alloys for mission-critical high-temperature applications where failure is not an option.
Table of Contents:
Nimonic alloys, including grades such as Nimonic 75 (UNS N06075), Nimonic 80A (UNS N07080), Nimonic 90 (UNS N07090), and Nimonic 105, are precipitation-hardening nickel-chromium superalloys containing aluminum, titanium, cobalt, and molybdenum additions. These alloys provide exceptional high-temperature strength, outstanding creep resistance up to 1200°C, excellent oxidation resistance, and superior thermal fatigue resistance. Nimonic 80A and 90 are particularly valued for gas turbine blades, combustion chambers, and exhaust systems, where they maintain structural integrity under extreme thermal cycling and mechanical stress.
Nimonic round bars are supplied globally per international standards, available in diameters from 6mm to 300mm, with solution-treated, aged, and custom finishes. Complete mill test certificates, aerospace certifications (AMS), and batch traceability support demanding aerospace, power generation, and industrial gas turbine projects. These bars offer good machinability in solution-treated condition, excellent weldability, and can be precipitation hardened to achieve superior strength properties.
As a trusted Nimonic Round Bars supplier, manufacturer, and stockist, Aurico Alloys LLP provides affordable, best-quality, authentic materials for aerospace, power generation, chemical, oil & gas, marine, and pharma industries, along with hardware and industrial supply stores ensuring certified reliability for critical high-temperature applications.
High-quality Nimonic Round Bars ready for industrial use.
Specification Overview
| Supplier & Manufacturer | Aurico Alloys LLP |
|---|---|
| Grade | Nimonic 75, 80A, 81, 86, 90, 105, 115, 263 and 901 |
| Standards | One rod and bar specification per grade – listed in Equivalent Grades & Standards below. Inspection certificates to EN 10204. |
| Diameter Range | 6mm – 300mm |
| Length | 100mm – 6000mm (custom cut available) |
| Finish | Solution treated, aged, bright, polished, ground, hot-rolled |
| Delivery | Direct stock, mill test certificates, AMS certification, batch traceability |
Nimonic Round Bar Grades Supplied
Each grade below has its own round bar page carrying that grade’s size range, properties and the specification written for it.
| Grade | Chosen for |
|---|---|
| Nimonic 75 Round Bars | Oxidation resistance with good formability and weldability |
| Nimonic 80A Round Bars | The original turbine blade alloy; strength at temperature |
| Nimonic 81 Round Bars | Resistance to high-temperature corrosion |
| Nimonic 86 Round Bars | Molybdenum-bearing, for strength without age hardening |
| Nimonic 90 Round Bars | Cobalt added over the 80A base for higher creep strength |
| Nimonic 105 Round Bars | Higher operating temperature than 90 |
| Nimonic 115 Round Bars | The highest creep strength in the family |
| Nimonic 263 Round Bars | Age hardened but picked for weldability, so it suits sheet fabrications |
| Nimonic 901 Round Bars | Iron-bearing disc alloy, for large rotating sections |
Equivalent Grades & Standards
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 |
| Rod and bar specification | BS HR 5 / HR 504 / DIN 17752 |
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 |
| Rod and bar specification | ASTM B637 / BS 3076 / HR 1 / DIN EN 10269 |
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 |
| Rod and bar 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 |
| Rod and bar 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 |
| Rod and bar specification | ASTM B637 / AMS 5829 / BS HR 2 / HR 501-503 |
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 |
| Rod and bar specification | BS HR 3 / AECMA PrEn 2179-2181 |
Identifiers and physical constants for Nimonic 105. A dash means no such designation is published for this grade.
Nimonic 115
| Property | Value |
|---|---|
| UNS number | — |
| Werkstoff / EN number | 2.4636 |
| EN designation | — |
| Density | 7.85 g/cm3 |
| Melting range | 1260-1315 °C |
| Specific heat (20 °C) | 444 J/kg·°C |
| Thermal conductivity (20 °C) | 10.6 W/m·°C |
| Electrical resistivity (20 °C) | 139 µΩ·cm |
| Coefficient of expansion (20-100 °C) | 12.0 µm/m·°C |
| Rod and bar specification | BS HR 4 / AECMA PrEn 2196 / 2197 |
Identifiers and physical constants for Nimonic 115. 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 |
| Rod and bar specification | BS HR 10 / DIN 17752 |
Identifiers and physical constants for Nimonic 263. A dash means no such designation is published for this grade.
Nimonic 901
| 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
Nimonic Round Bars are stocked in multiple grades and sizes for rapid global supply to aerospace, gas turbine, power generation, and industrial high-temperature projects with complete certification.
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 115
| Element | Min (%) | Max (%) |
|---|---|---|
| Carbon (C) | 0.12 | 0.2 |
| Silicon (Si) | — | 1.0 |
| Copper (Cu) | — | 0.2 |
| Iron (Fe) | — | 1.0 |
| Manganese (Mn) | — | 1.0 |
| Chromium (Cr) | 14.0 | 16.0 |
| Titanium (Ti) | 3.5 | 4.5 |
| Aluminium (Al) | 4.5 | 5.5 |
| Cobalt (Co) | 13.0 | 15.5 |
| Molybdenum (Mo) | 3.0 | 5.0 |
| Boron (B) | 0.01 | 0.025 |
| Zirconium (Zr) | — | 0.15 |
| Lead (Pb) | — | 0.0015 |
| Sulfur (S) | — | 0.015 |
| Nickel (Ni) | — | Balance |
Composition limits for Nimonic 115. 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.
Nimonic 901
| 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 | Nimonic 80A (Aged) | Nimonic 90 (Aged) |
|---|---|---|
| Tensile Strength (MPa) | ≥1100 | ≥1280 |
| Yield Strength (MPa) | ≥700 | ≥850 |
| Elongation (%) | ≥15 | ≥12 |
| Hardness (HB) | 290–370 | 320–400 |
| Max. Service Temp (°C) | up to 900 | up to 950 |
Applications & Benefits
- Aerospace: gas turbine blades, combustion chambers, exhaust systems, afterburner parts
- Power Generation: industrial gas turbine components, steam turbine blades, power plant equipment
- Chemical: high-temperature reactors, furnace components, catalyst support grids
- Oil & Gas: flare tips, burner components, high-temperature valves, downhole equipment
- Marine: marine gas turbine engines, high-performance exhaust systems
- Industrial: heat treatment fixtures, glass manufacturing equipment, nuclear reactor components
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 Round Bars from Aurico Alloys LLP deliver proven high-temperature strength, exceptional creep resistance, and certified compliance for aerospace, power generation, chemical, oil & gas, and marine sectors ensuring reliable performance in the most demanding thermal environments. Are your critical high-temperature assets protected with industry-leading Nimonic superalloys?