Hastelloy B2

Unique alloys for extreme environments

With a vast knowledge of metallurgy and the largest stock in Asia, we offer everything from pure titanium alloys for medical applications to nickel-chromium for gas turbines and Medical. We are highly focused on offering alloys that with their unique characteristics can handle extreme environments of all sorts.


Hastelloy® B-2, UNS Number N010665 , Other common names: Alloy B2

What is alloy b2?

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

Alloy B2 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.

What is the difference between Hastelloy B and C?
Hastelloy B is known for its resistance to HCl (hydrogen chloride) and for its creep and rupture strength at temperatures around 1,400°F. Hastelloy C resists active oxidizing agents such as wet CL2 (chlorine), hypochlorite bleach, FeCl3 (iron chloride), and HNO3 (nitric acid).
Why are nickel alloys so expensive?
They are significantly more expensive than ferrous metals; but because of their long life, nickel alloys may be the most cost-effective long term material selection. … Whenever unusually severe conditions are expected one could consider these alloys because of their unique resistance properties.