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Monel 400 Seamless Pipe
Monel 400 Seamless Pipe
Monel 400 Seamless Pipe
Monel 400 Seamless Pipe
Monel 400 Seamless Pipe

Monel 400 Seamless Pipe

Monel 400 Seamless Pipe is a corrosion-resistant alloy pipe with the largest consumption, the most versatile and excellent comprehensive performance. Monel 400 has excellent corrosion resistance in hydrofluoric acid and fluorine gas media, and also has excellent corrosion resistance to hot concentrated lye. At the same time, it is resistant to corrosion from neutral solutions, water, sea water, air, organic compounds, etc. An important feature of this alloy is that it generally does not produce stress corrosion cracks and has good cutting performance. Standard:ASTM, ASTM A312; Thickness:1 - 40 mm; Section Shape: Round Place of Origin: China Supply Ability:5000 Ton/Tons per Month Seamless Alloy Steel Monel 400 Pipe;

Monel 400 is a nickel-copper alloy (about 67% Ni – 23% Cu) that is resistant to seawater 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.

Product Characteristic:

1.Resistant to seawater and steam at high temperatures

2.Excellent resistance to rapidly flowing brackish water or seawater

3.Excellent resistance to stress corrosion cracking in most freshwaters

4.Particularly resistant to hydrochloric and hydrofluoric acids when they are de-aerated

5.Offers some resistance to hydrochloric and sulfuric acids at modest temperatures and concentrations, but is seldom the material of choice for these acids

6.Excellent resistance to neutral and alkaline salt

7.Resistance to chloride-induced stress corrosion cracking

8.Good mechanical properties from sub-zero temperatures up to 1020° F

9.High resistance to alkalis

Product Details:

Product Name:

monel 400 seamless pipe




ISO,SGS,BV and so on.


Air Condition or Refrigerator, Water Tube, Water Heater, Oil Cooler Pipe, Heat Exchanger,Refrigeration


1. cases packed in wooden cases
2. paper packaging
3. plastic packing
4. foam packaging
Packaging according to customer requirements or products


7-25 days or according to the product


L/C,D/A,D/P,T/T,Western Union,MoneyGram,According to customer requirements payments for offline orders.

Chemical Composition, %








.30 max

2.00 max

.024 max

.50 max

63.0 min


2.50 max


                                                                                                      ASTM Specification
Pipe Smls
Pipe Welded B725
Tube Smls B163
Tube Welded

Corrosion Resistant  of 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.

Product Display:

Monel 400 Pipe and ASTM B165 Alloy 400 Seamless Pipe

Nickel Alloy 400 Seamless Pipe/Tube Processing:

The production process of Monel 400 Seamless Pipe ① The main production process of Monel 400 hot-rolled seamless pipe (main inspection process): Tube billet preparation and inspection → tube billet heating → perforation → tube rolling → waste tube reheating → fixed (reduced) diameter → heat treatment → finished tube straightening → finishing → inspection (non-destructive, physical and chemical, bench inspection) → storage ② The main production process of Monel 400 cold rolled (drawn) seamless pipe Blank preparation → pickling and lubrication → cold rolling (drawing) → heat treatment → straightening → finishing → inspection

Application area:

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

Production Facility

production facility of Monel 400 Pipe and ASTM B165 Alloy 400 Seamless Pipe

Why Choose Ronsco:

Hunan Allianz metal products Co., Ltd. was founded in 1996, foreign trade began in 2013. Our company has three production bases (Shanghai, Jiangsu, and Hunan), with an annual sales volume of 30 million US Dollars. Our sales volume of high-temperature alloy is 10 million US Dollars, with an annual output of 600 tons.

Our products have been exported to more than 50 countries and regions, the main markets are Southeast Asia, East Asia, North America, South America, Australia, Russia.

Our high-temperature alloy production base is in Jiangsu (Suzhou) province, and our factory has 168 employees and 12 technicians. The main products are bars, tubes and forgings, and the main material is 254SMO / 253MA/ XM-19 / Inconel 625 / Inconel 718 / Hastelloy C276 / Incoloy A-286 / Monel 400 / Monel K-500.

Our raw materials are mainly from Jinchuan, whose nickel output ranks the third in the world. We are the strategic partner of Jinchuan group nickel alloy co., LTD.

At present, the company has 1.5 tons of VIM vacuum induction furnace, 1-5 tons of electro-slag remelting furnace and hydrogen atmosphere protection electro-slag ingot furnace, a full set of 20 tons of electric furnace, AOD refining furnace, LF ladle refining furnace, VD vacuum furnace, 5 tons of forging hammer and 8 mn fast forging machine, etc..

Bars and forgings:
our smelting method is VIM+ESR,if you have higher requirements,we have better smelting methods like VIM+VAR (vacuum smelting + vacuum consumable arc smelting - double vacuum), and Penetration testing and ultrasonic detection will be carried out.

Tubes: Our nickel alloy tubes are hot-extruded.

Packaging And Shipping:

Optin 1: packed with water-proof woven bag.bundled up with iron wire or strip, in wooden case, one label for one bundle.

Option 2: packed with plastic bag for each bar,water-proof woven bag for one bundle, one label for one bundle.

Packaging & Transfer of Monel 400 Pipe and ASTM B165 Alloy 400 Seamless Pipe

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