Hastelloy B-2 Strip

HastelloyB-2 alloy has the following characteristics

1. Control the iron element and chromium element at the lowest content to prevent the formation of β phase and Ni4Mo.

2. Excellent corrosion resistance to reducing environment.

3. Excellent corrosion resistance to medium-concentration sulfuric acid and many non-oxidizing acids.

4. Very good resistance to chloride ion reduction stress corrosion cracking (SCC).

5. Excellent corrosion resistance to various organic acids.

 

Metallographic structure of HastelloyB-2

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

 

Corrosion resistance of HastelloyB-2

Nickel-molybdenum alloy 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 weld seam also has sufficient corrosion resistance. Alloy B-2 has good corrosion resistance in reducing media, such as hydrochloric acid solutions at various temperatures and concentrations. It also has good corrosion resistance in medium-concentration sulfuric acid solutions (or containing a certain amount of chloride ions). It can also be used in acetic and phosphoric acid environments. Alloy materials can only have the best corrosion resistance when they have a suitable metallographic state and a pure crystal structure.

 

HastelloyB-2 application range application field

Alloy HastelloyB-2 is widely used in chemical, petrochemical, energy manufacturing and pollution control fields, especially in sulfuric acid, hydrochloric acid, phosphoric acid, acetic acid and other industries.

 

Material Overview	HastelloyB-2 alloy has the following characteristics 1. Control the iron element and chromium element at the lowest content to prevent the formation of β phase and Ni4Mo. 2. Excellent corrosion resistance to reducing environment. 3. Excellent corrosion resistance to medium-concentration sulfuric acid and many non-oxidizing acids. 4. Very good resistance to chloride ion reduction stress corrosion cracking (SCC). 5. Excellent corrosion resistance to various organic acids.
Similar Grades	GB/T NS322，UNS N10665，W.Nr 2.4617
Technical Standard	ASTM B462 ASTM B564 ASTM B575
Physical Properties	Melting point: 1325-1370 ℃
	Density: 8.90 g/cm3
Application	Industrial and aerospace turbines (combustion chambers, ballasts, structural covers) Industrial furnace components, support rolls,grids, ribbons and radiant tubes Spiral pipe in a petrochemical furnace Hot gas cooling nuclear reactors

 

Alloy	%	Nickel	molybdenum	Iron	chromium	cobalt	Carbon	manganese	vanadium
Alloy B	Mix	Remain	26	4.0					0.2
	Max		30	6.0	1.0	2.5	0.05	1.0	0.4
Alloy B-2	Mix	Remain	26	2.0
	Max		30	7.0	1.0	1.0	0.02	1.0

 

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