Monel 400 Pipe | Nickel Alloy 400 Tube | UNS N04400 Tubing

Monel 400 is a nickel-copper alloy (about 67% Ni – 23% Cu) that is resistant to sea water and steam at high temperatures as well as to salt and caustic solutions. Alloy 400 is a solid solution alloy that can only be hardened by cold working. This nickel alloy exhibits characteristics like good corrosion resistance, good weldability and high strength. A low corrosion rate in rapidly flowing brackish or seawater combined with excellent resistance to stress-corrosion cracking in most freshwaters, and its resistance to a variety of corrosive conditions led to its wide use in marine applications and other non-oxidizing chloride solutions. This nickel alloy is particularly resistant to hydrochloric and hydrofluoric acids when they are de-aerated. As would be expected from its high copper content, alloy 400 is rapidly attacked by nitric acid and ammonia systems.

Monel 400 has great mechanical properties at subzero temperatures, can be used in temperatures up to 1000° F, and its melting point is 2370-2460° F. However, alloy 400 is low in strength in the annealed condition so, a variety of tempers may be used to increase the strength.

Forms Available

• Sheet
• Plate
• Bar
• Pipe & Tube (welded & seamless)
• Fittings (i.e. flanges, slip-ons, blinds, weld-necks, lapjoints, long welding necks, socket welds, elbows, tees, stub-ends, returns, caps, crosses, reducers, and pipe nipples)
• Wire

What are the characteristics of Monel 400?

• Resistant to seawater and steam at high temperatures
• Excellent resistance to rapidly flowing brackish water or seawater
• Excellent resistance to stress corrosion cracking in most freshwaters
• Particularly resistant to hydrochloric and hydrofluoric acids when they are de-aerated
• Offers some resistance to hydrochloric and sulfuric acids at modest temperatures and concentrations, but is seldom the material of choice for these acids
• Excellent resistance to neutral and alkaline salt
• Resistance to chloride induced stress corrosion cracking
• Good mechanical properties from sub-zero temperatures up to 1020° F
• High resistance to alkalis

Chemical Composition, %

Corrosion Resistant Monel 400

Alloy 400 is virtually immune to chloride ion stress corrosion cracking in typical environments. Generally, its corrosion resistance is very good in reducing environments, but poor in oxidizing conditions. It is not useful in oxidizing acids, such as nitric acid and nitrous. Nevertheless, it is resistant to most alkalis, salts, waters, food products, organic substances and atmospheric conditions at normal and elevated temperatures.

This nickel alloy is attacked in sulfur-bearing gases above approximately 700° F and molten sulfur attacks the alloy at temperatures over approximately 500° F.

Monel 400 offers about the same corrosion resistance as nickel but with higher maximum working pressures and temperatures and at a lower cost due to its superior ability to be machined.

In what applications is Monel 400 used?

• Marine engineering
• Chemical and hydrocarbon processing equipment
• Gasoline and freshwater tanks
• Crude petroleum stills
• De-aerating heaters
• Boiler feed water heaters and other heat exchangers
• Valves, pumps, shafts, fittings, and fasteners
• Industrial heat exchangers
• Chlorinated solvents
• Crude oil distillation towers

Fabrication with Monel 400

Alloy 400 can easily be welded by gas-tungsten arc, gas metal arc or shielded metal arc processes using appropriate filler metals. There is no need for post weld heat treatment, however, thorough cleaning after welding is critical for optimum corrosion resistance, otherwise there is the risk of contamination and embrittlement.

Finished fabrications can be produced to a wide range of mechanical properties when proper control of the amount of hot or cold working and the selection of appropriate thermal treatments is done.

Like most other nickel alloys, Monel 400 is typically tough to machine and will work harden. However, excellent results can e obtained if you make the correct choices for tooling and machining.

Material Grade

Product Specification

Chemical Composition

We wrap the stainless steel products with anti-rust paper and steel rings to prevent damage.

 Identification labels are tagged accordingto standard specification or customer’s instructions. 

Special packing is available as per customer’s requirement.

Stainless Steel Coil Package

Stainless Steel Sheet / Stainless Steel Plate Package

Stainless Steel Strip Package

Shipment Package

Our company is based in Wuxi,  gathering city of industrial stainless steel in China.

We specialized in stainless coils, sheets and plate, stainless steel pipe and fittings, stainless steel tubes, and also aluminum products and copper products.

Our products have been highly praised by our clients from Europe, America, the Middle East, African and Southeast Asia. We will offer competitive products and comprehensive service to customers. 

Stainless Steel Grade: 201, 202, 202cu, 204, 204cu, 303, 304, 304L, 308, 308L, 309, 309s, 310, 310s, 316, 316L, 321, 347, 410, 416, 420, 430, 430F, 440, 440c,

Alloy Grade :Monel, Inconel, Hastolley, Duplex, Super Duplex, Titanium, Tantalum, High Speed Steel, Mild Steel, Aluminium, Alloy Steel, Carbon Steel, Special Nickel Alloys

In form of : Round Bars, Square Bars, Hexagonal Bars, Flat Bars, Angles, Channels, Profiles, Wires, Wire Rods, Sheets, Plates, Seamless Pipes, ERW Pipes, Flanges, Fittings,etc.

Q1: What is stainless?

A: Stainless means no marks on the steel surface, or a kind of steel that is not damaged by air or water and that does not change color, spotless, resistant to staining, rusting, the corrosive effect of chemicals.

Q2: Does stainless mean no rusting?

A: No, stainless means not easy to get stained or rusty, it has speical ability to reisist staining, rusting and corrosion.

Q3: Do you supply stainless steel sheets?

A: Yes, we supply different types of stainless steel sheets, with thickness ranges from 0.3-3.0mm. and in different finishes.

Q4: Do you accept cut to length service?

A: Of course, customer’s satisfaction is our top priority.

Q5: If i have a small order, do you accept small order?

A: Not a problem, your concern is our concern, small quantities are accepted.

Q6: How can you guarantee your product quality?

A: First, from the very start, we have already implemented a spirit to their mind, that is quality is life, our professional workers and staffs will follow up every step till the goods packed well and shipped out.

Q7: Will you pack the products?

A: Professional people do professional packing, we have different types of packing optional to customers, economic one or better one.

Q8: What do you need to know from customer before accurate quotation?

A: For an accurate quotation, we need to know grade, thickness, size, surface finish, color and quantity of your order, and also the destination of the goods. Customized product information will be needed more, like drawing, layout and plan. Then we will offer competitive quotation with the above information.

Q9: What kind of payment term you accpet?

A: We accept T/T, West union, L/C.

Q10: If this is a small order, will you delivery the goods to our agent?

A: Yes, we are born to solve problems of our customers, we will get the goods safely to your agent’s warehouse and send you the pictures.

Q11: Do you just make flat sheet? I want to make a fabrication for my new project.

A:  No, we mainly produce stainless steel flat sheet surface treatment, at the same time, we manufacture customized metal finished product as per customer’s drawing and plan, our technician will take care of the rest.

Q12: How many coutries you already exported ?
A: Exported to more than 50 countries mainly from America, Russia, UK, Kuwait, Egypt, Iran,
      Turkey, Jordan, etc.
Q13: How can I get some samples?
A: Small samples in store and can provide the samples for free. Catalgue is available, most
      patterns we have ready samples in stock. Customized samples will take about 5-7days.
Q14: What is the delivery ?
A: Sample order’s delivery time is 5- 7 days. Container orders are about 15-20 days.

Q15: What is the application about your Products?
A:  1.elevator door/cabin or and escalator’s side-wall.
      2.Wall cladding inside or outside meeting room/ restaurant.
      3.Facade when cladding over something, like columns in the lobby.
      4.Ceiling in the supermarket. 5.Decorative draws in some entertainment places.
Q16: How long Can You Guarantee for This Product/Finish?
A: Color guarantee for more than 10 years. Original materials quality certificate can
       be provided.