On an offshore rig battered by corrosive salt spray and heat, even a single unscheduled shutdown can cost millions. That risk changed for a petrochemical operator who shifted to Inconel round bars gaining uptime where cheaper steels continually failed. Today, industries from chemical processing to power and marine rely on Aurico Alloys LLP Inconel Round Bars for critical components, ensuring reliability, compliance, and peace of mind across plants and supply chains worldwide.
Table of Contents:
Inconel alloys, especially grades 600, 625, 718, and X-750 provide extraordinary resistance to high temperatures, stress corrosion cracking, pitting, and aggressive media including seawater, acids, and oilfield fluids. With nickel, chromium, molybdenum, niobium, and other advanced alloying, these bars excel where standard stainless or lower nickel alloys fail. Their mechanical strength and oxidation stability are retained at temperatures up to 1000°C, making them workhorses for power plant heat exchangers, gas turbines, reactors, marine components, and high-pressure valves.
Aurico Alloys LLP Inconel Round Bars are supplied with ASTM (B166/B446/B637), ASME, DIN, and EN certifications, plus full project documentation for traceability and compliance. Available in diameters from 6mm up to 300mm and custom finishes, they are trusted by fabricators, OEMs, maintenance shops, and hardware stores for urgent repair and new build projects demanding only the best materials.
Few products combine toughness in cryogenic and high-heat conditions, corrosion resistance, and weldability like Inconel. With a worldwide supply record and strong technical assistance, procurement heads and engineers increasingly select Aurico’s Inconel bars for environments where nothing less than top-tier performance will do.
High-quality Inconel Round Bars ready for industrial use.
Specifications
| Supplier | Aurico Alloys LLP |
|---|---|
| Grades | Inconel 625, 600, 601, 617, 686, 690, 693, 718, 725, 751, 783 and X-750 |
| Standards | One rod and bar specification per grade – listed in Equivalent Grades & Standards below. Inspection certificates to EN 10204. |
| Diameter | 6mm to 300mm |
| Finish | Bright, black, machined, centreless ground |
| Delivery | Cut-to-length, custom export packs, urgent dispatch |
| Price | INR 2,500 – 11,000 per kg. Indicative USD 29 – 129 per kg; quoted against grade, form, size and quantity. |
Inconel 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. 751 is supplied in this form but has no page of its own yet – ask us for it. Inconel 625 LCF is not made in this form; its own pages list the forms it is supplied in.
| Grade | Chosen for |
|---|---|
| Inconel 625 Round Bars | The general-purpose grade; seawater, chemical and marine |
| Inconel 600 Round Bars | Heat and oxidation resistance, chloride stress corrosion |
| Inconel 601 Round Bars | Aluminium added for higher oxidation resistance |
| Inconel 617 Round Bars | Creep strength above 900 °C |
| Inconel 686 Round Bars | Higher molybdenum and tungsten for severe wet corrosion |
| Inconel 690 Round Bars | High chromium for nuclear steam generator service |
| Inconel 693 Round Bars | Metal dusting resistance in syngas and reformer service |
| Inconel 718 Round Bars | The workhorse; strength to about 700 °C and weldable |
| Inconel 725 Round Bars | Corrosion resistance of 625 with age-hardened strength |
| Inconel 783 Round Bars | Oxidation resistant with low thermal expansion |
| Inconel X-750 Round Bars | Age-hardened spring and high-temperature bolting grade |
Equivalent Grades & Standards
Inconel 625
| Property | Value |
|---|---|
| UNS number | N06625 |
| Werkstoff / EN number | 2.4856 |
| Density | 8.44 g/cm3 |
| Melting range | 1290-1350 °C |
| Specific heat (21 °C) | 410 J/kg·°C |
| Rod and bar specification | ASTM B446 / AMS 5666 |
Identifiers and physical constants for Inconel 625. A dash means no such designation is published for this grade.
Inconel 600
| Property | Value |
|---|---|
| UNS number | N06600 |
| Werkstoff / EN number | 2.4816 |
| Density | 8.47 g/cm3 |
| Melting range | 1354-1413 °C |
| Specific heat | 444 J/kg·°C |
| Electrical resistivity | 1.03 µΩ·m |
| Curie temperature | -124 °C |
| Magnetic permeability (at 200 oersted / 15.9 kA/m) | 1.010 |
| Rod and bar specification | ASTM B166 / AMS 5665 |
Identifiers and physical constants for Inconel 600. A dash means no such designation is published for this grade.
Inconel 601
| Property | Value |
|---|---|
| UNS number | N06601 |
| Werkstoff / EN number | 2.4851 |
| Density | 8.11 g/cm3 |
| Melting range | 1360-1411 °C |
| Specific heat (21 °C) | 448 J/kg·°C |
| Magnetic permeability (200 oersted at 24 °C) | 1.003 |
| Magnetic permeability (200 oersted at -78 °C) | 1.004 |
| Magnetic permeability (200 oersted at -196 °C) | 1.016 |
| Curie temperature | < -196 °C |
| Rod and bar specification | ASTM B166 / AMS 5715 |
Identifiers and physical constants for Inconel 601. A dash means no such designation is published for this grade.
Inconel 617
| Property | Value |
|---|---|
| UNS number | N06617 |
| Werkstoff / EN number | 2.4663 |
| Density | 8.36 g/cm3 |
| Melting range | 1332-1380 °C |
| Specific heat (26 °C) | 419 J/kg·°C |
| Electrical resistivity (26 °C) | 1.22 µΩ·m |
| Rod and bar specification | ASTM B166 / AMS 5887 |
Identifiers and physical constants for Inconel 617. A dash means no such designation is published for this grade.
Inconel 686
| Property | Value |
|---|---|
| UNS number | N06686 |
| Werkstoff / EN number | 2.4606 |
| Density | 8.73 g/cm3 |
| Melting range | 1338-1380 °C |
| Electrical resistivity | 1.237 µΩ·m |
| Magnetic permeability (at 200 oersted / 15.9 kA/m) | 1.0001 |
| Rod and bar specification | ASTM B574 |
Identifiers and physical constants for Inconel 686. A dash means no such designation is published for this grade.
Inconel 690
| Property | Value |
|---|---|
| UNS number | N06690 |
| Werkstoff / EN number | 2.4642 |
| Density | 8.19 g/cm3 |
| Melting range | 1343-1377 °C |
| Specific heat | 450 J/kg·°C |
| Electrical resistivity | 1.148 µΩ·m |
| Magnetic permeability (at 200 oersted / 15.9 kA/m) | 1.001 |
| Young's modulus | 211 GPa |
| Poisson's ratio | 0.289 |
| Rod and bar specification | ASTM B166 / B564 |
Identifiers and physical constants for Inconel 690. A dash means no such designation is published for this grade.
Inconel 693
| Property | Value |
|---|---|
| UNS number | N06693 |
| Density | 7.77 g/cm3 |
| Melting range | 1317-1367 °C |
| Electrical resistivity | 1.168 µΩ·m |
| Rod and bar specification | ASTM B166 |
Identifiers and physical constants for Inconel 693. A dash means no such designation is published for this grade.
Inconel 718
| Property | Value |
|---|---|
| UNS number | N07718 |
| Werkstoff / EN number | 2.4668 |
| Density | 8.19 g/cm3 |
| Melting range | 1260-1336 °C |
| Density (annealed and aged) | 0.297 lb/in³ (bulletin publishes no SI value for this condition) |
| Specific heat (21 °C) | 435 J/kg·°C |
| Curie temperature (annealed) | < -196 °C |
| Curie temperature (annealed and aged) | -112 °C |
| Magnetic permeability (200 oersted at 21 °C - annealed) | 1.0013 |
| Magnetic permeability (200 oersted at 21 °C - annealed and aged) | 1.0011 |
| Rod and bar specification | ASTM B637 / AMS 5662 / 5663 |
Identifiers and physical constants for Inconel 718. A dash means no such designation is published for this grade.
Inconel 725
| Property | Value |
|---|---|
| UNS number | N07725 |
| Density | 8.31 g/cm3 |
| Melting range | 1271-1343 °C |
| Magnetic permeability (at 200 oersted / 15.9 kA/m) | < 1.001 |
| Young's modulus (21 °C) | 204 GPa |
| Shear modulus (21 °C) | 78 GPa |
| Poisson's ratio (21 °C) | 0.31 |
| Rod and bar specification | ASTM B805 |
Identifiers and physical constants for Inconel 725. A dash means no such designation is published for this grade.
Inconel 751
| Property | Value |
|---|---|
| UNS number | N07751 |
| Density | 8.22 g/cm3 |
| Melting range | 1390-1430 °C |
| Specific heat | 431 J/kg·°C |
| Curie temperature | -125 °C |
| Magnetic permeability (at 200 oersted / 15.9 kA/m) | 1.0035 |
| Coefficient of expansion (21-93 °C) | 12.6 µm/m·°C |
| Thermal conductivity | 12.0 W/m·°C |
| Electrical resistivity | 1.22 µΩ·m |
| Young's modulus | 214 GPa |
| Modulus of rigidity | 76 GPa |
| Rod and bar specification | Mill specification |
Identifiers and physical constants for Inconel 751. A dash means no such designation is published for this grade.
Inconel 783
| Property | Value |
|---|---|
| UNS number | R30783 |
| Density | 7.81 g/cm3 |
| Melting range | 1336-1407 °C |
| Specific heat (25 °C) | 455 J/kg·°C |
| Rod and bar specification | AMS 5940 / ASTM B637 |
Identifiers and physical constants for Inconel 783. A dash means no such designation is published for this grade.
Inconel X-750
| Property | Value |
|---|---|
| UNS number | N07750 |
| Werkstoff / EN number | 2.4669 |
| Density | 8.28 g/cm3 |
| Melting range | 1393-1427 °C |
| Curie temperature (as hot-rolled) | -225 °F (bulletin publishes no SI value) |
| Curie temperature (triple-heat-treated) | -193 °F (bulletin publishes no SI value) |
| Magnetic permeability (200 oersted at 21 °C - as hot-rolled) | 1.0020 |
| Magnetic permeability (200 oersted at 21 °C - triple-heat-treated) | 1.0035 |
| Emissivity (oxidised surface at 316 °C / 600 °F) | 0.895 |
| Emissivity (oxidised surface at 1093 °C / 2000 °F) | 0.925 |
| Linear contraction on precipitation treatment (704 °C / 1300 °F for 20 h - hot-rolled) | 0.00044 in/in |
| Linear contraction on precipitation treatment (704 °C / 1300 °F for 20 h - 20% cold-rolled) | 0.00052 in/in |
| Linear contraction on precipitation treatment (704 °C / 1300 °F for 20 h - annealed) | 0.00026 in/in |
| Rod and bar specification | ASTM B637 / AMS 5667-5671 / 5747 |
Identifiers and physical constants for Inconel X-750. A dash means no such designation is published for this grade.
Stock & Availability
Aurico Alloys LLP maintains ready stock of all major Inconel round bar grades, in all standard diameters and finishes, ready for immediate global or domestic dispatch, with mill/test certificates and batch certification included.
Chemical Composition
Inconel 625
| Element | Min (%) | Max (%) |
|---|---|---|
| Nickel (Ni) | 58.0 | — |
| Chromium (Cr) | 20.0 | 23.0 |
| Iron (Fe) | — | 5.0 |
| Molybdenum (Mo) | 8.0 | 10.0 |
| Niobium + Tantalum (Nb+Ta) | 3.15 | 4.15 |
| Carbon (C) | — | 0.10 |
| Manganese (Mn) | — | 0.50 |
| Silicon (Si) | — | 0.50 |
| Phosphorus (P) | — | 0.015 |
| Sulfur (S) | — | 0.015 |
| Aluminium (Al) | — | 0.40 |
| Titanium (Ti) | — | 0.40 |
| Cobalt (Co) | — | 1.0 (if determined) |
Composition limits for Inconel 625. 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.
Inconel 600
| Element | Min (%) | Max (%) |
|---|---|---|
| Ni+Co | 72.0 | — |
| Chromium (Cr) | 14.0 | 17.0 |
| Iron (Fe) | 6.0 | 10.0 |
| Carbon (C) | — | 0.15 |
| Manganese (Mn) | — | 1.0 |
| Sulfur (S) | — | 0.015 |
| Silicon (Si) | — | 0.50 |
| Copper (Cu) | — | 0.50 |
Composition limits for Inconel 600. 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.
Inconel 601
| Element | Min (%) | Max (%) |
|---|---|---|
| Nickel (Ni) | 58.0 | 63.0 |
| Chromium (Cr) | 21.0 | 25.0 |
| Iron (Fe) | — | Balance |
| Aluminium (Al) | 1.0 | 1.7 |
| Carbon (C) | — | 0.10 |
| Manganese (Mn) | — | 1.0 |
| Sulfur (S) | — | 0.015 |
| Silicon (Si) | — | 0.50 |
| Copper (Cu) | — | 1.0 |
Composition limits for Inconel 601. 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.
Inconel 617
| Element | Min (%) | Max (%) |
|---|---|---|
| Nickel (Ni) | 44.5 | — |
| Chromium (Cr) | 20.0 | 24.0 |
| Cobalt (Co) | 10.0 | 15.0 |
| Molybdenum (Mo) | 8.0 | 10.0 |
| Aluminium (Al) | 0.8 | 1.5 |
| Carbon (C) | 0.05 | 0.15 |
| Iron (Fe) | — | 3.0 |
| Manganese (Mn) | — | 1.0 |
| Silicon (Si) | — | 1.0 |
| Sulfur (S) | — | 0.015 |
| Titanium (Ti) | — | 0.6 |
| Copper (Cu) | — | 0.5 |
| Boron (B) | — | 0.006 |
Composition limits for Inconel 617. 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.
Inconel 686
| Element | Min (%) | Max (%) |
|---|---|---|
| Chromium (Cr) | 19.0 | 23.0 |
| Molybdenum (Mo) | 15.0 | 17.0 |
| Tungsten (W) | 3.0 | 4.4 |
| Titanium (Ti) | 0.02 | 0.25 |
| Iron (Fe) | — | 2.0 |
| Carbon (C) | — | 0.01 |
| Manganese (Mn) | — | 0.75 |
| Sulfur (S) | — | 0.02 |
| Silicon (Si) | — | 0.08 |
| Phosphorus (P) | — | 0.04 |
| Nickel (Ni) | — | Balance |
Composition limits for Inconel 686. 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.
Inconel 690
| Element | Min (%) | Max (%) |
|---|---|---|
| Nickel (Ni) | 58.0 | — |
| Chromium (Cr) | 27.0 | 31.0 |
| Iron (Fe) | 7.0 | 11.0 |
| Carbon (C) | — | 0.05 |
| Silicon (Si) | — | 0.50 |
| Manganese (Mn) | — | 0.50 |
| Sulfur (S) | — | 0.015 |
| Copper (Cu) | — | 0.50 |
Composition limits for Inconel 690. 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.
Inconel 693
| Element | Min (%) | Max (%) |
|---|---|---|
| Nickel (Ni) | — | Balance (determined arithmetically by difference) |
| Chromium (Cr) | 27.0 | 31.0 |
| Iron (Fe) | 2.5 | 6.0 |
| Aluminium (Al) | 2.5 | 4.0 |
| Niobium (Nb) | 0.5 | 2.5 |
| Manganese (Mn) | — | 1.0 |
| Titanium (Ti) | — | 1.0 |
| Copper (Cu) | — | 0.5 |
| Silicon (Si) | — | 0.5 |
| Carbon (C) | — | 0.15 |
| Sulfur (S) | — | 0.01 |
Composition limits for Inconel 693. 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.
Inconel 718
| Element | Min (%) | Max (%) |
|---|---|---|
| Ni+Co | 50.0 | 55.0 |
| Chromium (Cr) | 17.0 | 21.0 |
| Iron (Fe) | — | Balance |
| Niobium + Tantalum (Nb+Ta) | 4.75 | 5.50 |
| Molybdenum (Mo) | 2.80 | 3.30 |
| Titanium (Ti) | 0.65 | 1.15 |
| Aluminium (Al) | 0.20 | 0.80 |
| Cobalt (Co) | — | 1.0 |
| Copper (Cu) | — | 0.30 |
| Carbon (C) | — | 0.08 |
| Manganese (Mn) | — | 0.35 |
| Silicon (Si) | — | 0.35 |
| Phosphorus (P) | — | 0.015 |
| Sulfur (S) | — | 0.015 |
| Boron (B) | — | 0.006 |
Composition limits for Inconel 718. 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.
Inconel 725
| Element | Min (%) | Max (%) |
|---|---|---|
| Nickel (Ni) | 55.0 | 59.0 |
| Chromium (Cr) | 19.0 | 22.5 |
| Molybdenum (Mo) | 7.0 | 9.5 |
| Niobium (Nb) | 2.75 | 4.0 |
| Titanium (Ti) | 1.0 | 1.7 |
| Aluminium (Al) | — | 0.35 |
| Carbon (C) | — | 0.03 |
| Manganese (Mn) | — | 0.35 |
| Silicon (Si) | — | 0.20 |
| Phosphorus (P) | — | 0.015 |
| Sulfur (S) | — | 0.010 |
| Iron (Fe) | — | Balance |
Composition limits for Inconel 725. 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.
Inconel 751
| Element | Min (%) | Max (%) |
|---|---|---|
| Ni+Co | 70.0 | — |
| Chromium (Cr) | 14.0 | 17.0 |
| Iron (Fe) | 5.0 | 9.0 |
| Titanium (Ti) | 2.0 | 2.6 |
| Aluminium (Al) | 0.9 | 1.5 |
| Niobium + Tantalum (Nb+Ta) | 0.7 | 1.2 |
| Manganese (Mn) | — | 1.0 |
| Silicon (Si) | — | 0.5 |
| Sulfur (S) | — | 0.01 |
| Copper (Cu) | — | 0.5 |
| Carbon (C) | — | 0.10 |
Composition limits for Inconel 751. 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.
Inconel 783
| Element | Min (%) | Max (%) |
|---|---|---|
| Chromium (Cr) | 2.5 | 3.5 |
| Nickel (Ni) | 26.0 | 30.0 |
| Iron (Fe) | 24.0 | 27.0 |
| Niobium (Nb) | 2.5 | 3.5 |
| Aluminium (Al) | 5.0 | 6.0 |
| Cobalt (Co) | — | Balance |
| Boron (B) | 0.003 | 0.012 |
| Carbon (C) | — | 0.03 |
| Manganese (Mn) | — | 0.50 |
| Silicon (Si) | — | 0.50 |
| Phosphorus (P) | — | 0.015 |
| Sulfur (S) | — | 0.005 |
| Titanium (Ti) | 0.1 | 0.4 |
| Copper (Cu) | — | 0.50 |
Composition limits for Inconel 783. 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.
Inconel X-750
| Element | Min (%) | Max (%) |
|---|---|---|
| Ni+Co | 70.0 | — |
| Chromium (Cr) | 14.0 | 17.0 |
| Iron (Fe) | 5.0 | 9.0 |
| Titanium (Ti) | 2.25 | 2.75 |
| Niobium + Tantalum (Nb+Ta) | 0.70 | 1.20 |
| Aluminium (Al) | 0.40 | 1.00 |
| Cobalt (Co) | — | 1.0 (determination not required for routine acceptance) |
| Copper (Cu) | — | 0.50 |
| Carbon (C) | — | 0.08 |
| Manganese (Mn) | — | 1.0 |
| Silicon (Si) | — | 0.50 |
| Sulfur (S) | — | 0.010 |
Composition limits for Inconel X-750. 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 Properties
| Grade | Tensile (MPa) | Yield (MPa) | Elongation (%) | Hardness | Max. Temp. (°C) |
|---|---|---|---|---|---|
| 600 | 655 min | 310 min | 30 | 85–90 HRB | 1175 |
| 625 | 930 | 517 | 42.5 | ~92 HRB | 980 |
| 718 | 1275 | 1034 | 12–17 | 331 HB / 40 HRC | 704–982 |
| X-750 | 1100 | 800 | 12–20 | ~400 Brinell | 700–982 |
Applications & Benefits
- Chemical processing: reactors, tanks, valves, piping in caustics, acids, and solvents
- Oil & gas: offshore riser bars, tools, well components, hydrocarbon handling
- Marine: shipbuilding, seawater valves/fittings, desalination, defense equipment
- Power generation: turbines, boiler components, heat exchangers, nuclear reactors
- Pharma: pressure vessels, autoclaves, sterilization assemblies, process plants
- Fabrication/OEM: rapid spare parts, heavy machining, complex custom hardware
FAQ & 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 the chemical, marine, power, oil & gas, and pharma sectors, Aurico Alloys LLP’s Inconel round bars deliver proven performance, reliability, and verifiable international certification. Is your critical application equipped with the right superalloy bar for the job?