HastelloyB-2 alloy has the following characteristics:
- Control the iron and chromium elements at the minimum content to prevent the formation of β -phase Ni4Mo.
- Excellent corrosion resistance to reducing environments.
- Excellent resistance to medium-concentration sulfuric acid and many non-oxidizing acids.
- Excellent resistance to chloride ion reduction stress corrosion cracking (SCC)
- Excellent resistance to corrosion by various organic acids.
Metallographic structure of Hastelloy B-2:
Hastelloy B-2 has a face-centered cubic lattice structure. By controlling the iron and chromium contents at the minimum values, the processing brittleness was reduced and the precipitation of Ni4Mo between 700 and 870℃ was prevented.
Corrosion resistance of Hastelloy B-2:
The carbon and silicon contents of the nickel-molybdenum alloy Hastelloy B-2 are extremely low, which reduces the precipitation of carbon and other impurity phases in the heat-affected zone of welding. Therefore, its weld seam also has sufficient corrosion resistance. Alloy HastelloyB-2 exhibits excellent corrosion resistance in reducing media, such as hydrochloric acid solutions of various temperatures and concentrations. It also has excellent corrosion resistance in medium-concentration sulfuric acid solutions (or those containing a certain amount of chloride ions). It can also be used in acetic acid and phosphoric acid environments. Alloy materials can have the best corrosion resistance only when they are in an appropriate metallographic state and have a pure crystal structure.
The application scope and fields of Hastelloy B-2 include:
Alloy HastelloyB-2 is widely used in the fields of chemistry, petrochemicals, energy manufacturing and pollution control, especially in industries such as sulfuric acid, hydrochloric acid, phosphoric acid and acetic acid.
The density of this alloy is ρ=9.24/cm³.
