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Alloy B-3 alloy is an additional member of the nickel-molybdenum family of alloys with excellent resistance to hydrochloric acid at all concentrations and temperatures. It also withstands sulfuric, acetic, formic and phosphoric acids, and other nonoxidizing media. B-3 alloy has a special chemistry designed to achieve a level of thermal stability greatly superior to that of its predecessors, e.g. Alloy B-2 alloy. B-3 alloy has excellent resistance to pitting corrosion, to stress-corrosion cracking and to knife-line and heat-affected zone attack.

Pipe, tube, sheet, plate, round bar , flanes, valve, and forging.

Alloy B-3 also has a face-centered-cubic structure.

1. Maintains excellent ductility during transient exposures to intermediate temperatures；
2. Excellent resistance to pitting and stress-corrosion cracking
3. Excellent resistance to knife-line and heat-affected zone attack；
4. Excellent resistance to acetic, formic and phosphoric acids and other non-oxidizing media
5. Resistance to hydrochloric acid at all concentrations and temperatures；
6. Thermal stability superior to alloy B-2.

Alloy B-3 alloy is suitable for use in all applications previously requiring the use of Alloy B-2 alloy. Like B-2 alloy, B-3 is not recommended for use in the presence of ferric or cupric salts as these salts may cause rapid corrosion failure. Ferric or cupric salts may develop when hydrochloric acid comes in contact with iron or copper.