Monel® Alloy 400

UNS N04400

Monel 400 is a nickel-copper alloy (about 67% Ni – 23% Cu) that is resistant to sea water and steam at high temperatures as well as to salt and caustic solutions. A low corrosion rate in rapidly flowing brackish or seawater combined with excellent resistance to stress-corrosion cracking in most freshwaters, and its resistance to a variety of corrosive conditions led to its wide use in marine applications and other non-oxidizing chloride solutions. This nickel alloy is particularly resistant to hydrochloric and hydrofluoric acids when they are de-aerated. As would be expected from its high copper content, alloy 400 is rapidly attacked by nitric acid and ammonia systems. Monel 400 has great mechanical properties at subzero temperatures, can be used in temperatures up to 1000° F, and its melting point is 2370-2460° F.

Available from Inventory

Pipe – Seamless and Welded

Tubing – Seamless and Welded

Fittings – Butt Weld, Socket Weld

Flanges

½” Thru 12”

Schedules 10s, 40s, 80s and 160

Pressure Fittings - Threaded

1/4” Thru 2”

150#, 300#, 3000# and 6000#

Bar- Round, Flat and Hex

Plate and Sheet

Specifications

Pipe – ASTM B165, ASTM B725

Tube - ASTM B163

Butt-Weld Fittings – ASTM B366 WPW, WPX, WPS

Flanges – ASTM B564

Pressure Fittings – B366

Bar – ASTM B164

Sheet/Plate – B127

Chemical Composition %

All information above is not guaranteed and not for design purposes.