Hastelloy B2 is a hardened nickel-molybdenum hard alloy, characterized by good resistance to environments with the presence of gaseous hydrogen chloride, and sulfuric, acetic and phosphoric acids in small concentrations. Molybdenum neutralizes the influence of these media and provides good corrosion resistance.
Density of Hastelloy V-2 alloy (weight) - 9.2 g / cm3
Thermal properties N10665
This nickel-based alloy is weldable and has good resistance to intergranular carbide corrosion in the weld overlay area.
At the same time, Hastelloy B-2 / Alloy B-2 has poor resistance to corrosive oxidation, so it should not be used in this type of environment, as well as in the presence of 3-valent iron or 2-valent salt, as this is fraught with surface destruction ...
The alloy is produced in the form of a rod, a rod with a round section.
Hastelloy B-2 is used in units that involve chemical processes, as elements of vacuum furnaces and mechanical parts for equipment, the operation of which involves contact with reducing media.
Nickel-molybdenum alloy Nimofer 6928, with very low carbon and silicon content, which reduce carbide and other phase precipitation in thermally exposed weld zones, provides sufficient corrosion properties also in the welded state.
Nimofer 6928 exhibits good resistance to stress corrosion cracking and pitting and is especially corrosion resistant in reducing environments. It is resistant both against hydrochloric acid in wide temperature and concentration ranges, as well as against sulfuric acid of medium concentration with minor admixtures of chloride.
It can also be used in acetic and phosphoric acids. Optimum corrosion resistance can only be ensured if the material is used in a clean, shiny metallic condition.
The newly developed material Nimofer 6629 Alloy B-4 exhibits improved resistance to cracking corrosion than Nimofer 6928 Alloy B-2 with the same resistance to general corrosion and intergranular corrosion.
Sensitization resistance is also improved.
Nimofer 6928 can be welded with TIG and coated MMA welding. Arc welding is preferred. For gas-shielded welding, it is recommended to use a multicomponent shielding gas (Ar + He + H2 + CO2).
Nimofer S 6928 - FM зг-2
Main features and advantages of the alloy:
Controlled minimum content of iron and chromium to avoid precipitation of ordered beta-phase Ni4Mo;
Significant corrosion resistance in reducing environments;
Excellent resistance to pure sulfuric acid of medium concentration and some non-oxidizing acids;
Good resistance to chloride-induced stress corrosion cracking;
Good resistance to a range of organic acids.
Main areas of use:
Nimofer 6928 is widely used in the chemical industry, especially in processes containing sulfuric acid, hydrochloric acid, phosphoric acid or acetic acid. For special applications, contact the manufacturer of the semi-finished product.
Various products are produced from this alloy according to ASTM standards:
B333 - Plates, sheets, strips;
B335 - rods;
B366 - fittings;
B462 - forged or rolled pipe flanges, forged fittings, valves, and parts for high temperature corrosive service;
B472 - Reforging blanks;
B564 - forgings;
B619 - welded pipes;
B622 - seamless pipes;
B626 - welded pipes.
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