UNS N04400 / DIN 2.4360 / Monel 400 Alloy Pipes & Alloy 400 Tubes

Manufacturers of monel 400 tubes note that the alloy can withstand hydrochloric acid and hydrofluoric acid when deaerated. 400 Monel Heat Exchanger Tubes may tolerate hydrochloric and sulfuric acid at low temperatures and concentrations, but the alloy is rarely regarded as the best material for these applications at low acidic temperatures and concentrations. According to monel tube suppliers, the 400 High-Pressure Tube has excellent tolerance to both acidic and alkaline salts.

Besides being resistant to alkalis, monel 400 seamless tubes meet ASTM B163 standards. Because of the higher copper content of the Monel 400 Sanitary Tube, it is easily targeted when nitric acid or ammonia are present in the pipe structures. Despite its decent corrosion tolerance in reducing environments, Alloy 400 Tubing is weak in oxidizing ones. In the presence of oxidizing solutions such as nitric acid and nitrous acid, Alloy 400 Tube becomes corrosive, for example.

In spite of this, Monel 400 Tubing is suitable for food and beverage, as well as maritime applications. The material is also suitable for crude oil distillation towers, as well as chemical and hydrocarbon refining machines, as it can withstand certain acids, such as deaerated hydrochloric and hydrofluoric acids, as well as alkalis, salt solutions, liquids, food, etc. Due to this, Monel 400 Tubing can withstand both normal and high-temperature organic compounds and atmospheric pressures.

A tube made of Monel alloy 400 has high resilience and can withstand running seawater, brine, and brackish water very well. Due to this, the 400 Monel Bright Annealed Tube is almost universally used in marine-related applications. The tube is annealed at 926°C during annealing.

In general, Monel 400 Tube is bent on ordinary tube bending equipment. Mandrel benders are recommended for tight bends. Bends without a mandrel require larger radiuses. If a more modest radius bend is needed, it might be necessary to bend the tubing between 400°F and 600°F.

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