Monel 406 Alloy | Nickel-Copper Corrosion-Resistant Material Manufacturer & Supplier – Huaxiao-Alloy

Q: Q10: How to request a quotation?

A: Send your size, quantity, and standard requirements to sales@hxalloy.com or via the inquiry form below.

Supplied by Huaxiao-Alloy – Your Trusted Global Alloy Partner

1. Product Overview

Monel 406 is a nickel-copper-based corrosion-resistant alloy designed for exceptional performance in marine, chemical, and oil & gas environments. It is part of the Monel family (nickel-copper alloys), renowned for their excellent resistance to seawater, brine, and a wide range of acids and alkalis.

At Huaxiao-Alloy, we manufacture and supply Monel 406 alloy in various forms — including pipes, tubes, plates, sheets, bars, wires, and fittings — with full compliance to ASTM B164 / B165 / ASME SB164 / SB165 / UNS N04406 / DIN 2.4360 standards.

This alloy offers a unique balance of ductility, mechanical strength, and corrosion resistance, making it an excellent choice for demanding service conditions, such as marine engineering, chemical processing, heat exchangers, condensers, and pump shafts.

2. Key Chemical Composition (Typical %)

Element	Ni (Nickel)	Cu (Copper)	Fe (Iron)	Mn (Manganese)	Si (Silicon)	C (Carbon)	S (Sulfur)
Content (%)	62.0 min	28.0–34.0	2.5 max	2.0 max	0.5 max	0.15 max	0.02 max

The high nickel and copper composition provides Monel 406 with its distinctive resistance to seawater corrosion, stress cracking, and erosion, while maintaining excellent mechanical stability across temperature ranges.

3. Mechanical Properties

Property	Condition	Typical Value
Tensile Strength	Annealed	480–620 MPa (70–90 ksi)
Yield Strength (0.2% offset)	Annealed	170–275 MPa (25–40 ksi)
Elongation	% in 50mm	35–45%
Hardness	Brinell (HB)	120 max
Density	—	8.83 g/cm³
Melting Point	—	1300–1350°C

Monel 406 exhibits excellent ductility and toughness, even at sub-zero temperatures, making it suitable for cryogenic and marine applications.

4. Equivalent Grades

Standard	Grade Designation
UNS	N04406
W.Nr. (DIN)	2.4360
ASTM / ASME	B164, B165
JIS	NW4406
BS	NA 13
ISO	NiCu30Fe

5. Features and Benefits

Outstanding Corrosion Resistance
Excellent resistance to seawater, brine, and non-oxidizing acids (hydrochloric, hydrofluoric, sulfuric).
Performs exceptionally in marine and offshore conditions.
Excellent Mechanical Properties
Maintains strength and ductility from cryogenic temperatures up to 500°C (930°F).
Superior Resistance to Erosion and Cavitation
Ideal for high-velocity seawater and brine applications such as pump impellers and shafts.
Good Weldability and Fabrication
Easily welded using gas-tungsten arc, gas-metal arc, or resistance welding processes.
Thermal Stability
Stable mechanical and metallurgical behavior under thermal cycling, ensuring long service life.
Non-Magnetic
Naturally non-magnetic even at low temperatures, perfect for electronic and instrumentation components.

6. Available Forms at Huaxiao-Alloy

Product Form	Specification Range	Remarks
Pipe & Tube	OD 6–219 mm, WT 0.5–12 mm	Seamless / Welded; ASTM B165
Sheet & Plate	Thickness 0.5–50 mm	Hot or cold rolled; ASTM B127
Bar & Rod	Diameter 3–200 mm	ASTM B164; round, square, hex
Wire	0.1–10 mm	Coil or spool
Fittings & Flanges	Custom sizes	Forged or machined to spec
Strip / Coil	Width 10–1200 mm	Bright or annealed finish

All products are available in annealed, pickled, or bright-finished conditions with export-grade packaging.

7. Typical Applications

Monel 406 is used across multiple industries where corrosion resistance and strength are vital:

Marine & Offshore: Pump shafts, seawater valves, heat exchangers, and condenser tubes.
Chemical Processing: Acid handling equipment, reactors, and piping systems.
Oil & Gas: Downhole equipment, tubing, fittings, and valves.
Power Generation: Condenser tubes and cooling systems.
Aerospace & Defense: Fuel tanks, instrumentation, and fasteners.
Desalination Plants: Brine heaters and evaporator components.
Cryogenic Equipment: LNG storage and low-temperature service applications.

8. Fabrication & Welding Guide

Forming:
Monel 406 can be easily cold-formed using conventional techniques. For heavy forming, intermediate annealing is recommended.

Machining:
Machining should be performed at low speeds with sharp tools due to Monel’s work-hardening tendency.

Welding:

Recommended Filler Metal: Monel 60 or ENiCu-7 electrode.
Methods: TIG, MIG, or shielded metal arc welding.
Preheating: Not required. Post-weld annealing optional depending on application.

Heat Treatment:
Annealing at 870°C (1600°F) followed by air cooling is recommended to restore ductility and corrosion resistance.

9. Corrosion Resistance

Monel 406 provides long-term protection against:

Seawater corrosion and pitting
Brine and salt solutions
Hydrofluoric and hydrochloric acids
Alkaline media and caustic solutions
Stress corrosion cracking in fresh or saline water
Organic acids and neutral salts

Its performance in marine and offshore environments far exceeds that of stainless steels, especially under high chloride exposure.

10. Quality Assurance & Standards

At Huaxiao-Alloy, every Monel 406 product is:

Produced under ISO 9001:2015 quality management.
Certified to ASTM / ASME / DIN / EN / JIS standards.
100% traceable with mill test certificates (EN 10204 3.1).
Tested via PMI, ultrasonic, hardness, and hydrostatic tests.
Export-packed with moisture protection, end caps, and wooden cases.

We ensure precision manufacturing, corrosion-free finishes, and global shipping reliability from our facilities in Wuxi, Foshan, and Shanghai Baoshan.

11. Why Choose Huaxiao-Alloy

Huaxiao-Alloy operates advanced melting, hot-rolling, and precision machining facilities in Wuxi, Foshan, and Shanghai Baoshan. Our quality control follows ISO 9001 and ISO 14001 standards.

Each batch undergoes: