Hastelloy® B-2 / N010665

Other common names: Alloy B-2

Super alloys are also known as high performance alloys. They contain many elements in a variety of combinations designed to provide unique material properties for specific applications. These alloys can function at very high temperatures and in severe mechanical stress environments, and also where high surface stability is required. They have high creep and oxidation resistance.

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.

Equivalent materials to HASTELLOY(r) B-2 are:

• ASTM B333
• ASTM B335
• ASTM B366
• ASTM B564
• ASTM B619
• ASTM B622
• ASTM B626
• DIN 2.4615
• DIN 2.4617
• GE B50T38

        

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.

In what forms is Hastelloy B-2 Available at SAGAR STEELS ?

• 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

Chemical Composition, %

In what applications is Hastelloy B-2 used?

• Chemical processes
• Vacuum furnaces
• Mechanical components in reducing environments

ASTM Specifications

Mechanical Properties
Annealed Material

         

      

Heat Treatment

HASTELLOY(r) B-2 can be solution treated at 1065°C (1950°F) and then rapidly quenched in normal conditions that require product forms to be furnished and used. In cases where bright annealed product forms such as sheet and strip are required, HASTELLOY(r) B-2 can be solution treated at 1149°C (2100°F) and then cooled in a hydrogen atmosphere so as to avoid oxidation of the bright surface.

Hot Working

HASTELLOY(r) B-2 can be hot worked.

Forging

HASTELLOY(r) B-2 can be easily forged in the temperature range of 1232-982°C (2250-1800°F).

Cold Working

HASTELLOY(r) B-2 can be cold worked.

Machinability

HASTELLOY(r) B-2 can be machined using all the traditional machining methods.

Forming

HASTELLOY(r) B-2 can be easily formed using all the conventional methods.

Welding

HASTELLOY(r) B-2 can be welded using the traditional welding methods.

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