Monel Fasteners Specification

Monel Fasteners are nickel alloy fasteners with 29-33 % copper content also known by the trade name Nickel-Copper Alloys. It has high corrosion resistance to acids and alkalis with high mechanical properties and ductility. Being very difficult to machine , Monel Fasteners can be hardened and available in different variation like Monel 400, Monel 500 etc Monel 500 has additions of aluminum and titanium, which adds toughness to monel 400.
Applications: Monel fasteners are used for aerospace applications, oil refining and production, marine applications, drilling, rigging etc

Below are the most common alloys of monel.

Monel 400 Fasteners

Monel Alloy 400 is a Nickel-copper alloy that has high strength and extreme corrosion resistance in a range of media, including sea water, hydrofluoric acid, sulphuric acid, sulphuric acid and alkalis and hence it has variety of industrial applications. Used for marine engineering, chemical and hydrocarbon processing equipment, valves, pumps, shafts, fittings, fastener and fixings and heat exchangers.

Monel K-500 Fasteners

Monel Alloy K-500 is a precipitation- hardened Nickel-copper alloy that merges the corrosion resistance of Monel alloy 400 with higher strength and hardness. It possesses low permeability and is non-magnetic at temperatures as low as -150 degrees F (-101 Degrees C). Widely used for various industry applications such as pump shafts, oil-well tools and instruments, doctor blades and scrappers, spring valve trim, fastener and fixings and marine propeller shafts etc.

Trade NameASTM/AISIAlloy typeUNS%Copper%Aluminium%Titanim%Ferrous%Mangenese%Silicon%Ni
Monel400B 127,B 164N0440028-342.5 max2.0 max63 min
Monel401N0440128-342.5 max2.0 max63 min
Monel404N0440428-342.5 max2.0 max63 min
MonelK-500B 865N0550027-332.3-3.150.35-0.852.0 max1.5 max63 min
MonelR-405B 164N0440528-342.5 max2.0 max0.5 max63 min