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 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.

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

Chemical Composition, %

In what applications is Hastelloy B-2 used?

· Chemical processes

· Vacuum furnaces

· Mechanical components in reducing environments

For information on machining, click here.

ASTM Specifications

Mechanical Properties

Annealed Material