蜜桃影像传媒

La Aleación 400 (UNS N04400) es una aleación dúctil de níquel – cobre con resistencia a una variedad de condiciones corrosivas. La aleación se especifica más frecuentemente en ambientes que fluctúan desde levemente oxidantes hasta neutrales y en condiciones moderadamente reductoras. Un área adicional de aplicación de este material es en ambientes marinos y otras soluciones de cloruro no oxidantes.

Al igual que el níquel comercialmente puro, la Aleación 400 tiene una baja resistencia en su condición revenida. Por esta razón, Sandmeyer Steel Company ofrece también A400 rolada.

General Properties

Alloy 400 (UNS N04400) is a nickel-copper alloy with excellent resistance to a wide range of corrosive environments. It is resistant to chloride stress corrosion cracking and has high strength and toughness over a wide range of temperatures.

The alloy is used extensively in many corrosive applications especially in the marine and chemical processing industries. Alloy 400 is readily fabricated by conventional processing operations.

Alloy 400AR is produced in the as-rolled condition to meet higher strength requirements

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Chemical Analysis

Weight % (all values are maximum unless a range is otherwise indicated)

Mean Linear Expansion

(a) annealed material, (b) extrapolated

Mechanical Properties

Nominal Room-Temperature Mechanical Properties of Alloy 400 and 400AR

Corrosion Resistance

Alloy 400 is a very versatile corrosion resistant material. It exhibits resistance to corrosion in many reducing environments, and it is generally more resistant than higher copper alloys to oxidizing media. Alloy 400 is one of the few materials that will withstand contact with fluorine, hydrofluoric acid, hydrogen fluoride or their derivatives. The alloy has been found to offer exceptional resistance to hydrofluoric acid in all concentrations up to the boiling point. Alloy 400 also resists sulfuric and hydrochloric acids under reducing conditions. It has outstanding resistance to neutral and alkaline salts and has been utilized for many years as a material of construction for salt plants.

Alloy 400 is one of the most widely used materials for marine applications, shipbuilding and seawater desalination plants. The alloy exhibits very low rates of corrosion in flowing sea or brackish water. However, under stagnant conditions, the alloy can encounter crevice and pitting corrosion. Alloy 400 resists stress corrosion cracking and pitting in most fresh and industrial water applications.

Plant corrosion tests in the storage of commercial 60-65% hydrofluoric acid^a

(a) Acid contains 1.5-2.5% fluosilicic acid, 0.3-1.25% sulfuric acid, and 0.01-0.03% iron. Test specimens immersed in solution in storage tank. Temperature, 60-80°F (15-27°C); duration of test, 28 days.
(b) Specimen completely destroyed during test.

Resistance of Nickel Alloys to Impingement Attack by Seawater at 150 ft/sec (45.7 m/s)

NOTE: The information and data in this product data sheet are accurate to the best of our knowledge and belief, but are intended for informational purposes only, and may be revised at any time without notice. Applications suggested for the materials are described only to help readers make their own evaluations and decisions, and are neither guarantees nor to be construed as express or implied warranties of suitability for these or other applications.