Skyland Metal & Alloys Inc.

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Cupro Nickel Pipes , Tubes and fittings :-
Common names: 90/10 Copper-Nickel-lron 90/10 Cupro-nickel Cupro-nickel, 90/10 A copper-nickel alloy with an alpha phase structure. Small amounts of iron and manganese are added to improve corrosion resistance in high-velocity (from 1 to about 3.5 m/s) waters, including seawater. The alloy is relatively insensitive to stress corrosion. It has good cold- and hot- working properties and is readily weldable. The most commonly used wrought forms are plate, sheet and tube. Composition (weight %) Ni 9.0 - 11.0 Fe 1.0 - 2.0 Mn 0.3 - 1.0 Cu rem. 1. Some Typical Uses Chemical Tubes and tube plates for light-duty condensers, feed water heaters and evaporators, including power stations, sugar-making and desalination plant. Marine Tubes for condensers, evaporators and heat exchangers; tubes carrying seawater for fire mains, cooling-water circuits and sanitary services on board ship; sheathing for wooden piles; underwater fencing. Mechanical Multi-core cabled tubes for hydraulic and pneumatic lines.

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Copper Nickel Alloy Sheet ASTM B127 Gr UNS N04400 (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.

In what forms is Monel 400 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 it 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

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Copper-Nickel Pipe (Cupro Nickel)

The two common Seamless Copper-nickel alloys are Alloy 706 (C76000 - 10% nickel) and Alloy 710 (C71000 - 20% nickel).
Trenton stocks Alloy 706 only; Alloy 710 as well as other CuNi alloys are available as a special order.
The applicable Standard is ASTM B 466. This pipe is made in sizes as well a military specification pipe sizes. Trenton stocks standard pipe sizes only; Military specification pipe is available by special order.

Alloy 706 - Chemical Composition

Nickel 9-11 %
Lead max 0.05%
Iron 1-1.8%
Zinc max. 1%
Manganese max. 1%
Sulfur max. 0.02%
Phosphorus max. 0.02%
Copper remainder (approx. 88-89%)
Phosphorus (P) = 0.02%

Alloy 706 - Mechanical Properties
Tensile Strength 44-60(ksi)
Yield Strength 16-57(ksi)
Elongation in 2" 42-10/50mm%

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Cupro Nickel Plates, Sheets, Pipes, Tubes and fittings
Common names: 70/30 Copper-Nickel-lron 70/30 Cu pro-nickel Cupro-nickel, 70/30 A copper-nickel alloy with an alpha phase structure. Small amounts of iron and manganese are added to improve corrosion resistance in high-velocity (from 1 to about 3.5 m/s) waters, including seawater. The alloy is relatively insensitive to stress corrosion. It has good cold- and hot- working properties and is readily weldable. The most commonly used wrought forms are plate, sheet and tube. Composition (weight %) Ni 25.0 - 31.0 Fe 1.0 - 2.0 Mn 0.3 - 1.0 Cu rem. 1. Some Typical Uses Chemical Tubes and tube plates for light-duty condensers, feed water heaters and evaporators, including power stations, sugar-making and desalination plant. Marine Tubes for condensers, evaporators and heat exchangers; tubes carrying seawater for fire mains, cooling-water circuits and sanitary services on board ship; sheathing for wooden piles; underwater fencing. Mechanical Multi-core cabled tubes for hydraulic and pneumatic lines.

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SKYLAND METAL AND ALLOYS INC. are stockholders , manufacturers and exporters of All Kinds of Cu:Ni 70:30 and Cu:Ni 90:10 FLanges of different classes and different sizes as per customers requirement. We await for your requirements to be sent on sales@skylandmetal.co.in

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Specification:

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