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Hastelloy Alloy B/B-2

Hastelloy Alloy B/B-2
Product Details

Hastelloy B / B-2(UNS N10665/W.Nr.2.4617)


Chemical Composition Wt.%


%

Ni

Mo

Fe

Cr

Co

C

Mn

V

Si

P

S

Hastelloy B

min

bal

26

4.0





0.2




max

bal

30

6.0

1.0

2.5

0.05

1.0

0.4

1.0

0.04

0.03

Hastelloy B-2

min

bal

26

2.0









max

bal

30

7.0

1.0

1.0

0.02

1.0


1.0

0.04

0.03

Physical
Constants

Density.g/cm³

9.24 g/cm³

Melting Range

1330-1380 ℃

The minimum mechanical properties of the alloy at room temperature

Typical mechanical properties

tensile strength
Rm N/mm2

Yield Strength
RP0.2N/mm2

Elongation
A5 %

HB

Solution treatment

690

310

40

-

icrostr ycture

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

Metallographic structure

product

ASTMstandard

ASMEstandard

product

ASTMstandard

ASMEstandard

Sheet, sheet, strip

B333

SB333

Bar, pie

B335

SB335

Seamless pipe

B622

SB622

Forging material

B564

SB564

Welding pipe

B619.B626

SB619.SB626

Wire



Characters

1. Control of iron and chromium in the lowest content, preventing the formation of β-phase Ni4Mo.
2. Excellent corrosion resistance to reducing environment.
3. Excellent resistance to medium concentrations of sulfuric acid and many non-oxidizing acid corrosion.
4. Good resistance to chloride ion stress corrosion cracking (SCC).
5. Excellent resistance to all kinds of organic acid corrosion.

Corrosion Resistance

Nickel-molybdenum alloy Hastelloy B-2 has very low carbon and low silicon content and lowers the precipitation of carbon and other impurity phases in the weld heat-affected zone, so that the weld is also sufficiently corrosion resistant. Alloy Hastelloy B-2 has good corrosion resistance in reducing media, such as hydrochloric acid solutions of various temperatures and concentrations. In the medium concentration of sulfuric acid solution (or contain a certain amount of chloride ion) also has good corrosion resistance. At the same time can also be used for acetic acid and phosphate environment. Alloy materials have the best corrosion resistance only in the proper metallurgical state and pure crystalline structure.

Applications

Hastelloy B-2 alloy has a wide range of applications in the chemical, petrochemical, energy manufacturing and pollution control areas, especially in the sulfuric acid, hydrochloric acid, phosphoric acid, acetic acid and other industries.

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