In a high-pressure turbine overhaul for a chemical plant, repeated failures of traditional steel bars in the face of searing heat and corrosive gases put critical operations at risk. The stakes changed with the adoption of Nimonic 80A Round Bars, celebrated for resilience under thermal extremes and aggressive chemicals. Now, procurement heads, engineers, and fabricators in chemical, oil & gas, marine, pharma, and power sectors specify Nimonic 80A to unlock plant reliability, minimize downtime, and guarantee regulatory compliance through every maintenance cycle.
Table of Contents:
Nimonic 80A (UNS N07080, W. Nr. 2.4952 & 2.4631, ASTM B637) is a wrought, age-hardenable nickel-chromium alloy with titanium and aluminum for enhanced strength. Its unique metallurgy delivers high tensile, creep, and oxidation resistance up to 815°C, outclassing regular stainless steels and many nickel alloys. Nimonic 80A excels in demanding service environments such as turbines, heat exchangers, reactor vessels, and offshore equipment, where durability and temperature stability are essential.
These round bars are available in sizes from 3mm to 350mm diameters, custom cut or finished for project and OEM needs. Each batch comes with comprehensive certifications (ASTM B637, DIN 2.4952, NACE MR0175), mill test certificates, and global traceability. Also supplied are Nimonic 80A Round Bars, offering reliability to global chemical, marine, and energy-sector users.
By choosing Nimonic 80A, and trusted sources for Nimonic 80A Round Bars, industrial buyers achieve best-in-class value minimizing lifecycle costs with robust, quality-certified, and promptly shipped high-nickel superalloy bars.
High-quality Nimonic 80A Round Bars ready for industrial use.
Specification Overview
| Grade | Nimonic 80A (UNS N07080, W. Nr. 2.4952 & 2.4631) |
|---|---|
| Standards | ASTM B637, BS 3076 and HR 1, AECMA PrEn 2188, DIN 2.4952/2.4631, NACE MR0175 |
| Diameter Range | 3mm – 350mm |
| Length | 100mm – 6000mm (custom-cut possible) |
| Finish | Bright, ground, black, rough turned, custom |
| Delivery | Stocked, cut-to-length, certified export packaging |
| Price | INR 3,000 – 5,500 per kg. Indicative USD 35 – 65 per kg; quoted against grade, form, size and quantity. |
Equivalent Grades & Standards
| 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.
Stock & Product Availability
Nimonic 80A round bars are stocked for fast shipment in diameters 3–350mm, all certified for traceability, with custom cuts and machining for urgent OEM and maintenance requirements in chemical, oil & gas, marine, pharma, and power applications.
Chemical Composition
| 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.
Mechanical & Physical Properties
| Property | Typical Value |
|---|---|
| Tensile Strength (MPa) | ≥1250 |
| Yield Strength (0.2% MPa) | ≥780 |
| Elongation (%) | ≥30 |
| Hardness (HB) | ≤230 |
| Maximum Operating Temp (°C) | up to 815 |
| Creep Strength (°C) | up to 800 |
Applications & Benefits
Why this grade
Nimonic 80A is the same 80/20 nickel-chromium base made age-hardenable with titanium and aluminium, which precipitate gamma prime. It carries far more strength at temperature than 75 and has long been the choice for automotive and diesel exhaust valves and for turbine bolting to around 815°C. The trade-off is fabrication: it needs solution treatment before welding and a post-weld age, or it strain-age cracks.
- Chemical: Heat exchangers, reactor vessels, high-pressure acid lines.
- Marine: Pump shafts, superheater tubes, corrosion-exposed valves.
- Oil & Gas: Turbine blades, compressor rings, sour gas downhole tools.
- Pharma: Clean-room reactor agitators, sterilization hardware.
- Power: Boiler tubes, turbine discs, rotating engine components.
- Hardware/Industrial: Fasteners, high-stress supports, high-temperature die casting inserts.
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 80A round bars deliver exceptional high-temperature reliability, corrosion resistance, and mechanical strength for process, marine, oil & gas, pharmaceutical, and power industries, meeting UNS, ASTM, and DIN standards. Will the next critical upgrade in your plant rely on Nimonic 80A bar technology?