Monel 400 (UNS N04400) anti-corrosion alloy strip, bar, wire, pipe, forging, flange

Introduction

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. Alloy 400 is a solid solution alloy that can only be hardened by cold working. This nickel alloy exhibits characteristics like good corrosion resistance, good weldability and high strength. 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. However, alloy 400 is low in strength in the annealed condition so, a variety of tempers may be used to increase the strength.

Density:8.8g/cm³

Character

l Resistant to seawater and steam at high temperatures

l Excellent resistance to rapidly flowing brackish water or seawater

l Excellent resistance to stress corrosion cracking in most freshwaters

l Particularly resistant to hydrochloric and hydrofluoric acids when they are de-aerated

l Offers some resistance to hydrochloric and sulfuric acids at modest temperatures and concentrations, but is seldom the material of choice for these acids

l Excellent resistance to neutral and alkaline salt

l Resistance to chloride induced stress corrosion cracking

l Good mechanical properties from sub-zero temperatures up to 1020° F

l High resistance to alkalis

Application

l Marine engineering

l Chemical and hydrocarbon processing equipment

l Gasoline and freshwater tanks

l Crude petroleum stills

l De-aerating heaters

l Boiler feed water heaters and other heat exchangers

l Valves, pumps, shafts, fittings, and fasteners

l Industrial heat exchangers

l Chlorinated solvents

l Crude oil distillation towers

Equal grade

UNS N04400, Alloy 400

Chemical composition (%)

C≤0.30, Mn≤2.00, S≤0.024, Si≤0.50, Cu=28.0~34.0, Fe≤2.50, Ni=Remainder

Standards

ASTM B163

ASTM B725

ASTM B165

ASTM B127

ASTM B164

ASTM B564

ASTM B366

Forms of Monel 400 available at A-one Alloy

Plate, strip, bar, wire, pipe, forging, flange, fastener

Delivery

Plenty of bars/billet/sheet/plate in stock. For other products please contact A-one Alloy for confirmation