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Hastelloy B

Hastelloy B
Hastelloy B alloys have the following characteristics:
1. control iron and chromium elements at the lowest content, preventing the formation of β phase Ni4Mo. 2. excellent corrosion resistance to the reduction environment. 3. excellent resistance to moderate concentrations of sulfuric acid and many non-oxidative acid corrosivity. 4. good resistance to chloride ion reduction stress corrosion cracking (SCC). 5. excellent resistance to corrosion of various organic acids.6. overcontrol of iron and chromium content at the minimum reduces processing brittleness and prevents the precipitation of Ni4Mo phases between 700 and 870℃.
Hastelloy B application areas are:
Alloy Hastelloy B are widely used in chemical, petrochemical, energy manufacturing and pollution control fields, especially in sulfuric acid, hydrochloric acid, phosphoric acid, acetic acid and other industries.
Common number and number corresponding to Hastelloy B

Category

General name

Unified Digital Number Number Number

Name

GB of China

ASTM of the United States

New brand

Old brand

Ni-Mo

Hastelloy B (62 Ni28 Mo5Fe)

N30012

Hastelloy B

NS3201

NS321

UNS N10001



Hastelloy B corresponding casting forgings and bar grades

Cast castings

Forgings (similar deformed alloys)

Bar

Specification No.

Licence

Specification No.

Licence

Specification No.

Licence

ASTM A 494ASTM A 744

N-12MV

ASME B 335

N10001

ASME B 335

N10001



Hastelloy B physical properties:

 Density

 Melting point

 Thermal conductivity

 Specific heat capacity

 Elastic modulus

 Shear modulus

 resistivity

Poisson's ratio

 Line expansion coefficient

g/cm3

λ/(W/m•℃)

J/kg•℃

GPa

GPa

μΩ•m

a/10-6℃-1

9.24

1340

...

...

180-220

...

1.37

...

10.3(20~100℃



Hastelloy B chemical composition

Licence

UNS No.

Chemical element%

C

Mn

Si

P

S

Mo

Fe

Ni

Cr

V

Ksi[Mpa] of minimum tensile strength

Minimum yield strength Ksi[Mpa]

Minimum elongation,% gauge 2 inches [50 mm]

N12MV

N30012

Max

0.12

1.0

1.00

0.04

0.03

26.0-30.0

4.0-6.0

Balance

1.0

0.20-0.6

76[525]

40[275]

6



Hastelloy B temperature range

General name

Specification No.

Licence

Temperature range

Hastelloy B

ASTM B 335

N10001

 Temperature applicable≤425℃annealed materials only          N-12MV applicable temperature≤538℃use only solid-soluble materials



Hastelloy B heat treatment requirements

Materials

Heat treatment requirements

 Hastelloy B

1180℃water quenching or 1120℃rapid air cooling



Hastelloy B corrosion properties

Medium

good corrosion resistance for all concentrations of boiling hydrochloric acid, also good corrosion resistance in non-oxidative acid and non-oxidative salt solutions such as phosphoric acid, hydrofluoric acid, bromic acid, sulfuric acid, acetic acid and other organic acids, and many gases such as wet hydrogen chloride.

In the solution of oxidizing ions, oxidizing acids such as nitric acid and hydrochloric acid containing oxidizing salts, and sulfuric acid are not corrosion resistant.