Is Monel 400 better than nickel 400?
Monel 400 is a nickel-copper alloy (approximately 67% nickel - 23% copper) that is resistant to high-temperature seawater and steam as well as salt and corrosive solutions. Alloy 400 is a solid solution alloy that can only be hardened by cold working. This nickel alloy has good corrosion resistance, good weldability, and high strength. Low corrosion rates in fast-moving saltwater or seawater, excellent resistance to stress corrosion cracking in most freshwaters, and resistance to a wide range of corrosive conditions make it widely used in marine applications and other non-oxidizing chloride solutions.
Monel Alloy 400
This nickel alloy is particularly resistant to hydrochloric and hydrofluoric acids when outgassed. As expected from its high copper content, Alloy 400 is rapidly attacked by nitric acid and ammonia systems.
Monel 400 has excellent mechanical properties at subzero temperatures and can be used up to 1000° F. It has a melting point of 2370-2460° F. However, Alloy 400 is weak in the annealed condition, so various tempers can be used to increase strength.
What forms of Monel 400 does Gnee Steel offer?
Plates
Bars
Pipes and Tubes (Welded and Seamless)
Fittings
Elbows, Tees, Stub Ends, Returns, Caps, Crossheads, Reducers, Fittings, etc.
Wires
What are the characteristics of Monel 400?
Resistant to high temperature seawater and steam
Excellent resistance to fast moving brackish or seawater
Excellent resistance to stress corrosion cracking in most freshwaters
Particularly resistant to hydrochloric and hydrofluoric acids when degassed
Some resistance to hydrochloric and sulfuric acids at moderate temperatures and concentrations, but rarely the material of choice for these acids
Excellent resistance to neutral and alkaline salts
Resistant to stress corrosion cracking caused by chlorides
Good mechanical properties at temperatures from sub-zero to 1020° F
High resistance to alkalis
