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Nickel 200 | Nickel 200 Machinability | Nickel 200 Properties | Nickel 200 composition | Nickel 200 density | Nickel 200 datasheet | Nickel Applications


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Nickel 200

Nickel 200 | Nickel 200 Machinability | Nickel 200 Properties | Nickel 200 composition | Nickel 200 density | Nickel 200 datasheet | Nickel Applications

Hastelloy C276

What is Hastelloy | Hastelloy Principal Features | Hastelloy Creep and Stress-Rupture Strength | Hastelloy Typical Physical Properties | Hastelloy Price

Inconel 625

What is Inconel | Inconel Principal Features | Inconel Strength | Inconel Physical Properties | Inconel Price

Inconel 600

What is Inconel 600 | Inconel 600 Principal Features | Inconel 600 Strength | Inconel 600 Physical Properties | Inconel 600 Price

Inconel 825

What is Incoloy 825 | Incoloy 825 Principal Features | Incoloy 825 Strength | Incoloy 825 Physical Properties | Incoloy 825 Price

Inconel 800

What is Incoloy 800-ALLOY 800/800AT/800H | Incoloy 800 Principal Features | Incoloy 800 Strength | Incoloy 800 Physical Properties | Incoloy 800 Price

Monel 400

What is Monel 400 | Monel 400 Principal Features | Monel 400 Strength | Monel 400 Physical Properties | Monel 400 Price



What is Monel 400

Monel is a trademark of Special Metals Corporation for a series of nickel alloys, primarily composed of nickel (up to 67%) and copper, with some iron and other trace elements. Monel was created by David H. Browne, chief metallurgist for International Nickel Co. Monel alloy 400 is binary alloy of the same proportions of nickel and copper as is found naturally in the nickel ore from the Sudbury (Ontario) mines. It was named after company president Ambrose Monell, and patented in 1906. One L was dropped, because family names were not allowed as trademarks at that time.


Compared to steel, Monel is very difficult to machine as it work-hardens very quickly. It needs to be turned and worked at slow speeds and low feed rates. It is resistant to corrosion and acids, and some alloys can withstand a fire in pure oxygen. It is commonly used in applications with highly corrosive conditions. Small additions of aluminium and titanium form an alloy (K-500) with the same corrosion resistance but with much greater strength due to gamma prime formation on aging. Monel is typically much more expensive than stainless steel.

Monel alloy 400 has a specific gravity of 8.83, an electrical conductivity of approximately 3.4% IACS, and (in the annealed state) a hardness of 65 Rockwell B.

Monel 400 Principal Features

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.

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.

Monel 400 Physical Properties

Material notes
Typical Monel 400 has the following composition in weight (%).

C Max 0.3
Cu 28 - 34 
Fe Max 2.5 
Mn Max 2 
Ni Min 63 
S Max 0.024 
Si Max 0.5

Tensile strength, Ultimate 550 Mpa
Tensile strength, Yield 240 Mpa
Elongation at Break 48%
Electrical Resistance 5.47e-005 ohm-cm
Curie Temperature (the temperature above which a ferromagnetic substance loses its ferromagnetism) 35°C
CTE, linear 20°C 13.9 µm/m-°C
Heat Capacity 0.427 J/g-°C
Thermal Conductivity 21.8 W/m-K
Melting Point 1300 - 1350 °C
Solidus 1300 °C
Liquidus 1350 °C







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