HASTELLOY B-2 seamless pipe (UNS N010665 nickel-molybdenum alloy)

HASTELLOY B-2  UNS N010665

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.

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 forms is Hastelloy B-2 Available at A-one Alloy?

·                       Round Bar

·                       Seamless pipe

·                       Sheet/plate

·                       Fitting

·                       Flange

In what applications is Hastelloy B-2 used?

·                       Chemical processes

·                       Vacuum furnaces

·                       Mechanical components in reducing environments

ASTM Specifications

Mechanical Properties 
Annealed Material