In a high-pressure marine turbine project off the coast, repeated corrosion and creep failures in standard alloys led engineers to bet on Nimonic 115 Round Bars. Its robust chemistry nickel, chromium, cobalt, and strategic elements redefined equipment reliability and life, saving hundreds of thousands in downtime. Today, procurement heads, engineers, and OEMs in chemical, oil & gas, marine, pharma, and power sectors seek Nimonic 115 for superior toughness, traceability, and project compliance, trusting it where the margin for failure is zero.
Table of Contents:
Nimonic 115 (W. Nr. 2.4636/2.4969, BS HR4) is a high-strength nickel-chromium-cobalt alloy, further strengthened by molybdenum, aluminum, and titanium additions. It offers exceptional stability at >1000°C, holding a tensile strength around 1300 MPa, yield >850 MPa, and elongation at break near 25%. Its microstructure prevents embrittlement and guarantees outstanding performance during continuous thermal cycling, making it essential for gas turbines, reactor cores, and marine propulsion.
Round bars come in sizes from 6mm to 200mm diameter, as bright, ground, or rough-turned, with supplies meeting BS HR 4, AECMA, DIN and NACE MR0175 standards. Trusted suppliers maintain global inventory and advanced documentation for [Nimonic 115 Round Bars, as well as Inconel 718 Round Bars, enabling fast fulfillment for shutdowns and large projects.
Industrial buyers looking for best value, trusted quality, and ultimate performance select Nimonic 115 for severe environments driving down maintenance costs, mitigating safety risks, and achieving proven uptime in operations from process plants to turbine halls.
High-quality Nimonic 115 Round Bars ready for industrial use.
Specification Overview
| Grade | Nimonic 115 (W. Nr. 2.4636) |
|---|---|
| Standards | BS HR 4, AECMA PrEn 2196 & 2197, W.Nr. 2.4636, NACE MR0175 |
| Diameter Range | 6mm – 200mm |
| Length | 100mm – 6000mm |
| Finish | Bright, ground, rough-turned |
| Delivery | Stocked, certified export packaging, full traceability |
Equivalent Grades & Standards
| 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.
Stock & Product Availability
Nimonic 115 round bars are globally available in all key diameters, surface finishes, and certified packaging fulfilled quickly for chemical, oil & gas, marine, pharma, and power sectors.
Chemical Composition
| 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.
Mechanical & Physical Properties
| Property | Typical Value |
|---|---|
| Tensile Strength (MPa) | 1300 |
| Yield Strength (MPa) | 850 |
| Elongation (%) | 25 |
| Hardness (HV) | 280–320 |
| Max. Service Temp (°C) | >1000 |
Applications & Benefits
Why this grade
Nimonic 115 is the strongest of the wrought Nimonic series, taking blade service to roughly 1000°C. It is ordered where nothing lower in the range will hold the stress, and it is correspondingly the most difficult of the family to work and to weld.
- Chemical: Reformers, digester hardware, heat exchangers.
- Marine: Turbine shafts, seawater heat exchanger tubes, anti-corrosion fasteners.
- Oil & Gas: Gas turbine blades, hot valve parts, wellhead hardware.
- Pharma: Sterile plant hardware, incinerator fasteners.
- Power: Boiler tubes, combustor linings, high-temperature rods.
- Hardware: Fasteners, die cast inserts, support 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
For applications where safety, uptime, and project compliance matter, certified Nimonic 115 Round Bars set the new standard equipping process plants, refineries, and turbines with lasting value. Ready to upgrade to the next level of high-performance superalloy?