Hastelloy B bolt

Similar brands

GB/T	UNS	Trademark
NS321	N10001	Hastelloy B

 

Hastelloy B Bolt Chemical Composition

Alloy	%	Ni	Mo	Fe	Cr	Co	C	Mn	V	Si	P	S
Hastelloy B	Min	Balance	26	4.0	–	–	—	–	0.2	–	—	—
	Max		30	6.0	1.0	2.5	0.05	1.0	0.4	1.0	0.04	0.03

 

Physical properties of Hastelloy B bolts

density	9.24g/cm3
melting point	1330~1380 °c

 

Minimum mechanical properties of Hastelloy B bolts at room temperature

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

 

Hastelloy B bolt alloy has the following properties:

1. Control the content of iron and chromium elements to the minimum to prevent the formation of B-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 chloride ion reduction stress corrosion cracking (SCC).
5. Excellent resistance to corrosion by various organic acids.

Metallographic structure of Hastelloy B bolts:

Hastelloy B has a face-centered cubic lattice structure. By controlling the iron and chromium content to the minimum, the processing brittleness is reduced and the precipitation of Ni4M0 phase between 700-870°C is prevented.

Corrosion resistance of Hastelloy B bolts:

Nickel-molybdenum alloy Hastelloy B 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 Hastelloy 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 bolt application scope: Alloy Hastelloy B has a wide range of applications in the fields of chemistry, petrochemicals, energy manufacturing and pollution control, especially in sulfuric acid, hydrochloric acid, phosphoric acid, acetic acid and other industries.