When a major offshore drilling rig faced relentless corrosion from saltwater exposure, traditional stainless steel components failed repeatedly threatening operations and safety. The turning point came with Monel Round Bars. These nickel-copper alloys delivered unmatched seawater corrosion resistance, eliminating failures and extending component life by years. Today, engineers and procurement heads across chemical, marine, oil & gas, pharma, and power sectors trust Monel round bars for their proven resilience in the harshest marine and chemical environments.
Table of Contents:
Monel alloys, particularly Monel 400 (UNS N04400) and Monel K-500 (UNS N05500), are nickel-copper alloys containing approximately 67% nickel and 30% copper, with additions of iron and manganese. Monel 400 provides exceptional resistance to seawater, hydrofluoric acid, sulfuric acid, and alkaline environments, while Monel K-500 adds aluminum and titanium for precipitation hardening, delivering approximately three times the yield strength of Monel 400 with maintained corrosion resistance. These alloys excel in marine hardware, chemical processing equipment, pumps, valves, and propeller shafts where saltwater corrosion and chemical attack are constant threats.
Monel round bars are supplied globally per ASTM B164, ASME SB164, and EN standards, available in diameters from 3mm to 800mm, with bright, polished, ground, and hot-rolled finishes. Complete mill test certificates, NACE MR0175 compliance, and batch traceability support demanding offshore, marine, and chemical processing projects. These bars offer excellent machinability, weldability (TIG, MIG), and can be hot or cold worked for complex fabrications.
As a trusted Monel Round Bars supplier, manufacturer, and stockist, Aurico Alloys LLP provides affordable, best-quality, authentic materials for chemical, marine, oil & gas, pharma, and power generation industries, along with hardware and industrial supply stores ensuring certified reliability for critical marine and corrosive applications.
High-quality Monel Round Bars ready for industrial use.
Specification Overview
| Supplier & Manufacturer | Aurico Alloys LLP |
|---|---|
| Grade | Monel 400, 405 and K-500 |
| Standards | One rod and bar specification per grade – listed in Equivalent Grades & Standards below. Inspection certificates to EN 10204. |
| Diameter Range | 3mm – 800mm |
| Length | 100mm – 6000mm (custom cut available) |
| Finish | Bright, polished, ground, hot-rolled, cold-drawn, peeled |
| Delivery | Direct stock, mill test certificates, NACE MR0175, batch traceability |
| Price | INR 2,500 – 5,500 per kg. Indicative USD 29 – 65 per kg; quoted against grade, form, size and quantity. |
Monel 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 |
|---|---|
| Monel 400 Round Bars | The base alloy; seawater, hydrofluoric acid, brine |
| Monel 405 Round Bars | Sulphur added for machinability in high-volume turning |
| Monel K-500 Round Bars | Aluminium and titanium added for strength, same corrosion behaviour |
Equivalent Grades & Standards
Monel 400
| Property | Value |
|---|---|
| UNS number | N04400 |
| Werkstoff / EN number | 2.4360 / 2.4361 |
| Density | 8.80 g/cm3 |
| Melting range | 1300-1350 °C |
| Modulus of elasticity (tension) | 26.0 × 10³ ksi |
| Modulus of elasticity (compression) | 26.0 × 10³ ksi |
| Modulus of elasticity (torsion) | 9.5 × 10³ ksi |
| Poisson's ratio | 0.32 |
| Curie temperature | 21-49 °C |
| Rod and bar specification | ASTM B164 |
Identifiers and physical constants for Monel 400. A dash means no such designation is published for this grade.
Monel 405
| Property | Value |
|---|---|
| UNS number | N04405 |
| Werkstoff / EN number | — |
| Density | 8.80 g/cm3 |
| Melting range | 1300-1350 °C |
| Modulus of elasticity (tension) | 26.0 × 10³ ksi |
| Modulus of elasticity (compression) | 26.0 × 10³ ksi |
| Modulus of elasticity (torsion) | 9.5 × 10³ ksi |
| Poisson's ratio | 0.32 |
| Curie temperature | 21-49 °C |
| Rod and bar specification | ASTM B164 |
Identifiers and physical constants for Monel 405. A dash means no such designation is published for this grade.
Monel K-500
| Property | Value |
|---|---|
| UNS number | N05500 |
| Werkstoff / EN number | 2.4375 |
| Density | 8.44 g/cm3 |
| Melting range | 1315-1350 °C |
| Modulus of elasticity (tension) | 26.0 × 10³ ksi |
| Modulus of elasticity (torsion) | 9.5 × 10³ ksi |
| Poisson's ratio (aged material at room temperature) | 0.32 |
| Rod and bar specification | ASTM B865 |
Identifiers and physical constants for Monel K-500. A dash means no such designation is published for this grade.
Stock & Product Availability
Monel Round Bars are stocked in comprehensive grades and sizes for rapid global supply to marine, chemical processing, offshore, and power projects with complete certification.
Chemical Composition
Monel 400
| Element | Min (%) | Max (%) |
|---|---|---|
| Nickel (Ni) | 63.0 | — |
| Carbon (C) | — | 0.3 |
| Manganese (Mn) | — | 2.0 |
| Iron (Fe) | — | 2.5 |
| Sulfur (S) | — | 0.024 |
| Silicon (Si) | — | 0.5 |
| Copper (Cu) | 28.0 | 34.0 |
Composition limits for Monel 400. 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.
Monel 405
| Element | Min (%) | Max (%) |
|---|---|---|
| Nickel (Ni) | 63.0 | — |
| Carbon (C) | — | 0.3 |
| Manganese (Mn) | — | 2.0 |
| Iron (Fe) | — | 2.5 |
| Sulfur (S) | 0.025 | 0.060 |
| Silicon (Si) | — | 0.5 |
| Copper (Cu) | 28.0 | 34.0 |
Composition limits for Monel 405. 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.
Monel K-500
| Element | Min (%) | Max (%) |
|---|---|---|
| Nickel (Ni) | 63.0 | — |
| Carbon (C) | — | 0.25 |
| Manganese (Mn) | — | 1.5 |
| Iron (Fe) | — | 2.0 |
| Sulfur (S) | — | 0.01 |
| Silicon (Si) | — | 0.5 |
| Copper (Cu) | 27.0 | 33.0 |
| Aluminium (Al) | 2.30 | 3.15 |
| Titanium (Ti) | 0.35 | 0.85 |
Composition limits for Monel K-500. 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 | Monel 400 | Monel K-500 (Aged) |
|---|---|---|
| Tensile Strength (MPa) | ≥480 | ≥1050 |
| Yield Strength (MPa) | ≥170 | ≥700 |
| Elongation (%) | ≥35 | ≥20 |
| Hardness (HB) | 110–150 | 280–350 |
| Max. Service Temp (°C) | up to 540 | up to 480 (aged condition) |
Applications & Benefits
- Marine: propeller shafts, pump shafts, seawater valves, marine fasteners, submarine components
- Chemical: hydrofluoric acid tanks, heat exchangers, chemical processing vessels, piping systems
- Oil & Gas: offshore drilling components, downhole equipment, sour gas handling
- Aerospace: engine components, exhaust systems, aircraft frames
- Power: feedwater heaters, de-aerating heaters, turbine components
- Pharmaceutical: process equipment, sterilization systems
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
Monel Round Bars from Aurico Alloys LLP deliver proven seawater corrosion resistance, exceptional strength (Monel K-500), and certified compliance for marine, chemical, oil & gas, pharma, and power sectors ensuring longer asset life and safer operations in the harshest environments. Are your critical marine and chemical assets protected with industry-leading Monel alloys?