Corrosion Resistant Nickel-Copper Alloy Metal Monel 400 N04400 Superalloy Round Bar

Nickel Alloy 400/ Monel 400

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. monel 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, monel 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, monel 400 is low in strength in the annealed condition so, a variety of tempers may be used to increase the strength.

Monel 400 main characteristics:

• 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

Monel 400 corrosion resistant:
Monel 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.

Description
Monel 400(UNS N04400/2.4360) is a nickel-copper alloy with high strength and excellent resistance to a range of media including seawater, dilute hydrofluoric and sulfuric acids, and alkalies.
Monel 400 containing about 30-33% copper in a nickel matrix has many similar characteristics of commercially pure nickel, while improving upon many others. Addition of some iron significantly improves the resistance to cavitation and erosion in condenser tube applications. The main uses of Monel 400 are under conditions of high flow velocity and erosion as in propeller shafts, propellers, pump-impeller blades, casings, condenser tubes, and heat exchanger tubes. Corrosion rate in moving seawater is generally less than 0.025 mm/year. The alloy can pit in stagnant seawater, however, the rate of attack is considerably less than in commercially pure alloy 200. Due to its high nickel content (approx. 65%) the alloy is generally immune to chloride stress corrosion cracking. The general corrosion resistance of Monel 400 in nonoxidizing mineral acids is better compared to nickel. However, it suffers from the same weakness of exhibiting very poor corrosion resistance to oxidizing media such as nitric acid, ferric chloride, cupric chloride, wet chlorine, chromic acid, sulfur dioxide, or ammonia. In unaerated dilute hydrochloric and sulfuric acid solution the alloy has useful resistance up to concentrations of 15% at room temperature and up to 2% at somewhat higher temperature, not exceeding 50°C. Due to this specific characteristic, Monel 400 produced by NiWire is also used in processes where chlorinated solvents may form hydrochloric acid due to hydrolysis, which would cause failure in standard stainless steel.
Monel 400 possesses good corrosion resistance at ambient temperatures to all HF concentration in the absence of air. Aerated solutions and higher temperature increase the corrosion rate. The alloy is susceptible to stress corrosion cracking in moist aerated hydrofluoric or hydrofluorosilic acid vapor. This can be minimized by deaeration of the environments or by stress relieving anneal of the component in question.
Typical applications are valve and pump parts, propeller shafts, marine fixtures and fasteners, electronic components, chemical processing equipment, gasoline and freshwater tanks, petroleum processing equipment, boiler feedwater heaters and other heat exchangers
Chemical Composition

Specifications

Physical Properties

Mechanical Properties

Our Production Standard

Size Range
Monel 400 wire, bar, rod, strip, forging, plate, sheet, tube, fastener and other standard forms are available.

Q:What the main products you can supply?

A:We are the professional and famous factory in China for Stainles stee sheet/ Coils/ Tubes/ Profiles/Composite packaging Naterials; Corten steel;Wear Resistant steel and Carton steels.

Q:Will you can accept the customized and OEM products?

A:Yes,we can do the production based on your drawings and with your logo,also because we have very strong design and development team,so the feedblack is very good for customized product.

Q:What is your payment terms?

A:Commonly two payment term for new customers

1 ) 30%T/T as deposit,70% balance against B/L copy. 2)100% Irrevocable L/C at sight.

If you need other terms, please feel free to contact us too, we will try our best.

Q:How about the samples? Is it free to extra fees?

A:Yes,we would like to suply the samples before order, if the samples from stock, it will be free,if the sampies from new production, we will charge some reasonable cost, but this amount will be deducted from your filst order invoice.

Q:How long is your delivery time?

A:Our daily inventory is more than 8000tons, so far common products size,just need 5 days from stocks; if the special size from new production, delivery 20-30 days.

Q:How to control and guarantee your shipment quailty?

A:1) All our factories are ISO9001 certified facility; 2) World famous origin mills as TISCO, Baosteel; 3)Ex factory inspecttion by our own laboratory; 4)SGS/BV Third party inspection before deilvery.