Hastelloy B-2 Nickel Alloy
Hastelloy B-2(UNS N10665) is a classic nickel-molybdenum alloy that significantly improves weldability and hot workability by reducing carbon and silicon content, addressing the embrittlement issues of early B alloys. It demonstrates outstanding corrosion resistance in high-temperature reducing environments like hydrochloric and sulfuric acids, widely used in reactors, heat exchangers for chemical and pharmaceutical industries.
Chemical Composition
|
Ni |
C |
Si |
Mn |
S |
P |
Mo |
Fe |
Cr |
Co |
|
|
Min |
Rem |
- |
- |
- |
- |
- |
26 |
- |
- |
- |
|
Max |
0.02 |
0.1 |
1 |
0.03 |
0.04 |
32 |
2 |
1 |
1 |
Material Properties
|
Density |
Melting Point |
Minimum Mechanical Properties of the Alloy at Room Temperature |
||
|
Tensile Strength |
Yield Strength |
Elongation |
||
|
g/cm3 |
℃ |
Rm N/mm2 |
Rp0.2 N/mm2 |
A5% |
|
9.24 |
1330-1380 |
690 |
310 |
40 |
Standards
ASTM B335,ASTM B333,ASTM B622
Feature
By minimizing the contents of iron and chromium, this alloy promotes the formation of the β-phase Ni₄Mo, resulting in an optimized microstructure. It exhibits excellent corrosion resistance in reducing environments, with outstanding performance against moderately concentrated sulfuric acid and various non-oxidizing acids. In addition, it shows strong resistance to chloride-induced stress corrosion cracking (SCC).
Applications
Hastelloy B-2 is a nickel-molybdenum alloy known for its exceptional resistance to reducing environments. It is widely used in the chemical, petrochemical, energy, and pollution control industries. Typical applications include:
1.Processing equipment for highly corrosive media such as sulfuric acid, hydrochloric acid, phosphoric acid, and acetic acid;
2.Corrosion-resistant components in nuclear waste treatment systems;
3.Manufacturing equipment for fertilizers, pesticides, and other chemical products;
4.Chloride-containing systems used in gold extraction and refining.
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