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Monel 400 Ni-Cu Single-Phase Solid Solution Alloy

Monel 400 is a classic Ni-Cu single-phase solid solution alloy with excellent corrosion resistance in seawater, hydrofluoric acid, neutral salts, and reducing atmospheres. It also possesses good strength, toughness, and cold and hot working properties, making it a classic seawater- and hydrofluoric acid-resistant material used in marine engineering, chemical engineering, shipbuilding, and oil and gas industries.

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Name	Corrosion-resistant Alloys
Thickness	Common thickness	0.5–6 mm (for stamping, bending, household appliances / automotive parts)
	Medium-thick specification	6–20 mm (for steel structures, mechanical bases)
	Thick specification	20–100 mm (for heavy-duty frames, pressure vessels)
Tolerance	±0.02–±0.10 mm (varies with thickness)
Width	1000、1219、1250、1500、1800、2000
Length	plate/sheet:2000、2500、3000、6000、12000mm	Coil:Single roll weight: 8 to 25 tons
Material Standards	AISI, ASTM, ASME, DIN, BS, EN, ISO, JIS, SAE, etc.
Delivery Condition	AR / As Rolled ，TMCP / Thermo-Mechanical Controlled Process ，N / Normalized，NR / Normalized Rolled ，CR / Controlled Rolling
Surface treatment	Pickling and passivation, sandblasting, polishing (including mechanical polishing and chemical polishing, achieving a surface finish of Ra≤0.8μm), annealing.
Delivery status	Solution-treated and aged (ST) state, cold-rolled/hot-rolled state
Delivery Time	within 5-10 days(Special specifications will take 15 to 20 days)

Material Introduction

Common Applications:

Marine Engineering: Seawater pump shafts, seawater heat exchangers, condensers, ship valves, pipelines, propeller shafts

Chemical Equipment: Hydrofluoric acid production and storage equipment, sulfuric acid/phosphoric acid operating components, salt evaporators

Oil and Gas Industry: Drilling tools, downhole pipelines, Christmas trees, components for acidic gas environments

Power Industry: Boiler feedwater pumps, freshwater coolers, nuclear reactor structural components

Others: Food processing equipment, precision instruments, flame-retardant and explosion-proof components, ship fasteners

United States UNS/ASTM	China GB	Germany W.Nr./DIN	United Kingdom BS	France AFNOR	Japan JIS
N04400	N04400	2.436	NA13	MN	NU30
Monel 400	0Ni65Cu30Mn	NiCu30Fe	NA13	MN	NU30

Chemical composition (mass fraction, %)

Element	Ni+Co	Cu	Fe	Mn	C	Si	S
Content	63.0~70.0	28.0~34.0	≤2.5	≤2.0	≤0.3	≤0.5	≤0.024

Mechanical properties (inspection standards)

Tensile strength Rm	Proportional limit Rp0.2	Strain at break A5	Density	Melting point range
≥480 MPa	≥170 MPa	≥35%	8.83 g/cm³	1300-1350℃

Advantages:

Extremely strong resistance to seawater corrosion: Resistant to seawater erosion, cavitation corrosion, and chloride ion corrosion, performing far better than stainless steel.

Excellent resistance to hydrofluoric acid: Excellent stability in anhydrous and reducing hydrofluoric acid environments.

Resistant to neutral salts and alkalis: Good resistance to chloride, sulfate, and caustic alkali environments.

Balanced mechanical properties: Moderate strength, good toughness, and stable performance at high and low temperatures.

Good machinability and weldability: Easy to roll, stamp, and cut; excellent weldability.

Non-magnetic and low magnetic permeability: Suitable for precision instruments, explosion-proof applications, and marine electronic equipment.

Disadvantages:

Poor resistance to oxidizing acids: Severe corrosion in oxidizing acids such as nitric acid and chromic acid.

Limited high-temperature performance: Easily oxidizes above 315℃; unsuitable for high-temperature, strong oxidizing environments.

Sensitive to stress corrosion: May develop SCC in high-temperature fluoride and mercury salt environments.

High cutting viscosity: Material is sticky, easily sticks to the cutting tool, and processing efficiency is generally low.

Hot Selling Products/Standards:

Bars/Wires: ASTM B164

Plates/Strips: ASTM B127

Seamless Tubes: ASTM B165

Forgings/Flanges: ASTM B564 fittings: ASTM B366

Documentation and Certification

Material Certificate: Mill Test Certificate (MTC), conforming to GB/ASTM/EN standards

Test Report: Chemical composition, mechanical properties, non-destructive testing (UT/MT/PT)

Packaging and Transportation

Rust Prevention: Passivation / Pickling / Rust-preventive oil + moisture-proof paper

Crater: Solid wood pallet / iron box, moisture-proof, impact-resistant

Transportation: Suitable for sea/air freight, marked with moisture-proof, shock-proof, high-end alloy

Payment Methods

Flexible payment terms available: T/T and L/C. For new clients, 30% advance payment for production, balance against copy of B/L. L/C is acceptable for large & regular orders to secure both parties.

Previous:Incoloy 825 Ni-Fe-Cr corrosion-resistant Alloy

Next:Monel K-500 Time-optimized Ni-Cu Alloy

Warehousing Management

Before each batch of steel leaves the factory, a complete process inspection is strictly carried out. From chemical composition, mechanical properties to dimensional tolerance and surface quality, each item is carefully checked to ensure compliance with national standards and export regulations. At the same time, the quantity, packaging and rust prevention treatment are also verified. An original factory warranty certificate is attached, guaranteeing the quality. Before shipment, inspection photos are provided. Any non-compliant items will not be released, and the quality is fully controllable throughout the process. This ensures your overseas purchasing is safe and worry-free.

All items are visually inspected before delivery. No cracks, deformation, rust, scratches or cutting marks are allowed; edges must be smooth. Only visually sound products will be shipped.

Thickness, width, length, wall thickness, outer diameter have been measured. Straightness, curvature, torsion, diagonal tolerance all meet the corresponding tolerance requirements.

Quality inspection includes: mechanical property tests (yield strength, tensile strength), elongation rate, impact energy, hardness testing, chemical composition testing, process performance testing, etc.

Inspection according to packaging requirements: secure binding, moisture-proof film, rust-proof paper, export fumigation/fumigation-free wooden crates, shipping marks, gross weight, net weight, etc.

We will provide full reception services to support the customers' on-site inspection of the goods.

Hot Rolling Production Line

Cold rolling precision processing

Cold drawing/cold rolling line

Hot Rolling Production Line

Hot rolling production line (producing hot-rolled coils/medium-thick plates, thickness 2–60mm)

Cold rolling precision processing

(Producing ultra-thin / high-precision / shiny panels, with thickness ranging from 0.1 to 3mm, for high-end products)
Cold drawing/cold rolling line

(High-precision cold-drawn round steel, square steel, hexagonal steel, and special-shaped bars)

Cold drawing/cold rolling line

(High-precision cold-drawn round steel, square steel, hexagonal steel, and special-shaped bars)

Warehousing Management

A ten-thousand-ton standardized warehouse with grid-based zoning and system positioning enables rapid material retrieval and reduces the time spent searching for materials.

Inbound inspection: Verify the physical items against the inbound form, inspect the appearance, dimensions, and labels. Once confirmed to be correct, the materials are entered into the ERP system and processed for storage.

Logistics and Global Delivery: Self-operated fleet + contracted logistics partners; expedited service available for urgent orders.

International Shipping: Supports FOB, CIF, DDP, and other trade terms, covering 100+ countries and regions.

Process: Booking → Trucking → Customs Declaration → Loading onto Ship/Aircraft → Bill of Lading Issuance → Document Delivery → Destination Port Customs Clearance (Optional) → Last-Mile Delivery.

Provides door-to-door one-stop logistics with full tracking to ensure safe and timely arrival of goods.

After-Sales Service and Traceability: Delivery receipts, logistics information, and quality inspection documents are sent to customers within 24 hours of shipment.

Established a full product lifecycle traceability system, allowing tracking of production, quality inspection, warehousing, and transportation records.

Follow-up inspection within 72 hours of arrival; rapid response and handling of quality issues; assistance in resolving customs clearance issues for foreign trade orders.

Packaging Method