Hastelloy B-3

 This Nickel-Molybdenum alloy gives excellent resistance to hydrochloric acid at all concentrations and temperatures from ambient to high. It also withstands sulphuric, acetic, formic and phosphoric acids and other non oxidizing media. B-3 also has excellent resistance to pitting corrosion and to stress-corrosion cracking. Hastelloy B-3 is not recommended in the presence of ferric or cupric salts.

 Chemical Composition Hastelloy B-3

Applications of Hastelloy B-3

B-3® is used in the chemical process industry to handle concentrated acids and other aggressive media. Other uses include heat-treating fixtures, aerospace, food processing, oil & gas, aerospace, and nuclear power generation. CRA offers speciality alloy B-3® seamless pipe & tube for use in multiple industries and applications, including:

• Chemical Processing
• Oil & Gas
• Aerospace
• Nuclear Power Generation
• Food Processing
• Heat-treating Fixtures

Physical Properties

Conclusion

Industrially, HASTELLOY® B-3® alloy is often used in the production and processing of many concentrated acids. HASTELLOY® B-3® alloy is also used to make mechanical components and vacuum furnaces. HASTELLOY® B-3® alloy also has many applications in chemical processing. These include making plants for ethylbenzene, phenol, and acetic anhydride production. The pressure vessels used for chloroprene production, along with nuclear reactors, chemical reactors and distillation equipment are manufactured in HASTELLOY® B-3® alloy.

HASTELLOY® B-3® alloy can be both forged and otherwise hot-worked. Before it is worked on, the alloy must be heated through at 2250°F (1230°C). This alloy welds well using gas metal arc, gas tungsten arc, and shielded metal arc welding processes. Oxyacetylene and submerged arc welding are best avoided, as they may deprecate corrosion resistance.

Forming components from HASTELLOY® B-3® alloy through cold-working techniques is also possible. HASTELLOY® B-3® alloy hardens rapidly during cold-working, which results in more stages of cold-working and annealing. Cold-working can potentially reduce resistance to stress corrosion cracking.
With a carbon content of less than 0.01%, HASTELLOY® B-3® alloy can be used in the as-welded condition. Excessive heating of the alloy should be avoided during finishing to achieve the required grain size. Preheating of the material before annealing is seldom necessary.
HASTELLOY® B-3® alloy has a tensile strength of 125 ksi (860 MPA) and operates at temperatures between -300°F and 1800°F (-184°C to 900°C). All wrought HASTELLOY® B-3® alloys are solution heat-treated at 1950°F (1065°C) before rapid quenching. Annealed strip or coil products are solution heat-treated at 2100°F (1150°C) and cooled in hydrogen.
Extremely versatile, and with the ability to survive under high-stress, high-temperature applications, HASTELLOY® B-3® alloy has become a global market leader in high-performing nickel-molybdenum alloys.