Monel 400 Alloy Fasteners / UNS N04400 / DIN 2.4360

A typical application for Monel 400 Fasteners is chemical and hydrocarbon processing, marine engineering, heat exchangers, valves and pumps. Monel 400 Bolts and Nuts are resistant to deterioration in both chemical and marine environments due to their high ductility and thermal conductivity. Most Monel 400 Socket Head Cap Screws are used in alkylation units, specifically in the reacting section where concentrated hydrofluoric acid is present.

A high percentage of nickel and copper is contained in the alloy of Monel 400 Washers. Although the Monel 400 Hex Nuts is considered to be a very useful alloy, its price is about 5 to 10 times more than plain copper or ordinary nickel. Because of this, Monel 400 screws aren’t used in most applications due to their cost-ineffectiveness. It is, however, only used for applications or operations where no other metal or alloy could be used as a substitute for Monel 400. In cases such as this, Monel 400 Hex Bolts are used because they can maintain their high tensile strength even at temperatures below zero.

Monel 400 Nuts can be machined using conventional techniques similar to those used for iron alloys, but they tend to harden when they are machined. In order to harden alloy UNS N04400 bolts, mechanical stresses must be applied with soft die materials to change their shape after cold working with mechanical stress.

Although Monel 400 Fasteners are known to be corrosion resistant towards many compounds, Monel 400 cannot withstand nitrous acid, nitric oxide, sulfur dioxide, or hypochlorite’s. Consequently, Monel 400 should not be used in environments where it would be exposed to those chemicals. Additionally, Monel 400 is susceptible to galvanic corrosion, which means aluminium, zinc, and iron fasteners can corrode quickly when used with it.

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