Mega Mex

MONEL® ALLOY 400 UNS N04400 Other common names: Alloy 400 Monel 400 FlangesMonel 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. In what forms is Monel 400 Available at Mega Mex? Sheet Plate Bar Pipe & Tube (welded & seamless) Fittings (i.e. flanges, slip-ons, blinds, weld-necks, lapjoints, long welding necks, socket welds, elbows, tees, stub-ends, returns, caps, crosses, reducers, and pipe nipples) Wire What are the characteristics of Monel 400? Resistant to seawater and steam at high temperatures Excellent resistance to rapidly flowing brackish water or seawater Excellent resistance to stress corrosion cracking in most freshwaters Particularly resistant to hydrochloric and hydrofluoric acids when they are de-aerated Offers some resistance to hydrochloric and sulfuric acids at modest temperatures and concentrations, but is seldom the material of choice for these acids Excellent resistance to neutral and alkaline salt Resistance to chloride induced stress corrosion cracking Good mechanical properties from sub-zero temperatures up to 1020° F High resistance to alkalis

Other common names: Alloy B-2 Hastelloy B2 is a solid solution strengthened, nickel-molybdenum alloy, with significant resistance to reducing environments like hydrogen chloride gas, and sulfuric, acetic and phosphoric acids. Molybdenum is the primary alloying element which provides significant corrosion resistance to reducing environments. This nickel steel alloy can be used in the as-welded condition because it resists the formation of grain-boundary carbide precipitates in the weld heat-affected zone. This nickel alloy provides excellent resistance to hydrochloric acid at all concentrations and temperatures. In additions, Hastelloy B2 has excellent resistance to pitting, stress corrosion cracking and to knife-line and heat-affected zone attack. Alloy B2 provides resistance to pure sulfuric acid and a number of non-oxidizing acids. Limiting Factors of Hastelloy B2 Hastelloy B-2Alloy B-2 has poor corrosion resistance to oxidizingenvironments, therefore, it is not recommended for use in oxidizing media or in the presence of ferric or cupric salts because they may cause rapid premature corrosion failure. These salts may develop when hydrochloric acid comes in contact with iron and copper. Therefore, if this alloy is used in conjunction with iron or copper piping in a system containing hydrochloric acid, the presence of these salts could cause the alloy to fail prematurely. In addition, this nickel steel alloy should not be used at temperatures between 1000° F and 1600° F because of a reduction in the ductility in the alloy. In what forms is Hastelloy B-2 Available at Mega Mex? Round Bar What are the characteristics of Hastelloy B2? Great resistance to stress corrosion cracking and pitting Significant resistance to reducing conditions like hydrogen chloride, sulfuric, acetic and phosphoric acids Resistance to hydrochloric acid at all concentrations and temperatures