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℃ |
|
1390 |
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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. |