Hastelloy B-2 (N10665/NS322/2.4617) nut

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GB/T	UNS	Trademark	W.Nr
NS322	N10665	Hastelloy B2	2.4617

 

Hastelloy B-2 Nut: Chemical Composition

Alloy	%	Ni	Mo	Fe	Cr	Co	C	Mn	V	Si	P	S
Hastelloy B-2	Min	Balance	26	–					0.2
	Max		30	2.0	1.0	1.0	0.02	1.0	0.4	0.1	0.04	0.03

 

Physical Properties of Hastelloy B-2 Nuts

density	9.24g/cm3
melting point	1330~1380C

 

Minimum mechanical properties of the alloy Hastelloy B-2 nut at room temperature

Alloy status	tensile strength Rm N/mm2	Yield Strength RP0.2 N/mm2	Elongation A5%
Solid solution	690	310	40

 

Hastelloy Hastelloy B-2 nut alloy has the following properties:

1. Control the content of iron and chromium at the lowest level to prevent the formation of β phase Ni4Mo.
2. Excellent corrosion resistance to reducing environments.
3. Excellent corrosion resistance to medium concentration sulfuric acid and many non-oxidizing acids.
4. Excellent resistance to ammonia ion reduction stress corrosion cracking (SCC).
5. Excellent resistance to corrosion by various organic acids.

 

Metallographic structure of Hastelloy B-2 nut:

Hastelloy B-2 has a face-centered cubic lattice structure. By controlling the iron and chromium content to a minimum, the processing brittleness is reduced and the precipitation of the Ni4Mo phase between 700-870°C is prevented.

 

Corrosion resistance of Hastelloy B-2 nuts:

Nickel-molybdenum alloy Hastelloy B-2 has extremely low carbon and silicon content, which reduces the precipitation of carbon and other impurity phases in the welding heat-affected zone, so its welds also have sufficient corrosion resistance. Alloy Hasteloy B-2 has good corrosion resistance in reducing media, such as hydrochloric acid solutions of various temperatures and concentrations. It also has good corrosion resistance in moderately concentrated sulfuric acid solutions (or containing a certain amount of ammonium ions). It can also be used in acetic acid and phosphoric acid environments. Alloy materials can have the best corrosion resistance only when they are in a straight metallographic state and pure crystal structure. Hastelloy B-2 Nut Application Scope Application fields include:

Alloy Hastelloy B-2 has a wide range of applications in the chemical, petrochemical, energy manufacturing and pollution control fields, especially in sulfuric acid, hydrochloric acid, and phosphoric acid.

Acetic acid and other industries.