Hastelloy B-3

Scope of supply for Aviation Group

Forgings, round rods, steel plates, rings, seamless pipes, steel plates/steel belts, capillaries, wire welding materials, welcome to inquire

1. Material introduction

Hastelloy B3 (N10675) is a nickel-based high-temperature alloy mainly composed of nickel, molybdenum and cobalt with nickel content around 65%. Optimized based on Hastelloy B2, it gains better thermal stability, improved corrosion resistance and superior hot & cold formability, and is widely applied in chemical equipment manufacturing in recent years.

2. Chemical components

3. Physical properties

Minimum room temperature mechanical properties of the alloy:

4. Material characteristics

• B-3 alloy belongs to nickel-molybdenum alloy series, offering excellent resistance to hydrochloric acid of any temperature and concentration, as well as good corrosion resistance to non-oxidizing media including sulfuric acid, acetic acid, formic acid and phosphoric acid.
• Optimized chemical composition greatly improves thermal stability compared with B-2 alloy; B-3 shows high resistance to pitting corrosion, stress corrosion, knife-line corrosion and weld heat-affected zone corrosion.
• Metallographic structure of Hastelloy B-3: Face-centered cubic lattice structure. Low controlled iron and chromium content suppresses precipitation of Ni4Mo phase between 700-800℃ and reduces the risk of processing embrittlement.

5. B-3 application fields

It is widely used in chemical, petrochemical, energy production and waste gas/water treatment industries, especially equipment for sulfuric acid, hydrochloric acid, phosphoric acid and acetic acid production. Similar to B-2 alloy, B-3 is not suitable for environments containing ferric salt and cupric salt, as these salts will cause rapid corrosion failure. Contact between hydrochloric acid and iron/copper will generate ferric and cupric ions.