Superior resistance to hydrochloric acid and sulfuric acid MA-B2 is especially suited for equipment that handles hydrochloric acids of all concentrations and at any temperature up to the boiling point. Also it is corrosion-resistant to hydrogen chloride gases, sulfuric acids, acetic acids, and phosphoric acids. However, it is not recommended to be used in environments which contain a certain amount of ferric salt or cupric salt, since corrosion may occur in somecases. For example, if hydrochloric acid comes into contact with iron or copper, ferric salt or cupric salt may be formed. In processes containing hydrochloric acids, if the alloy is used to connect steel (iron) pipes or copper pipes, MA-B2 might be damaged by corrosion at an early stage.
MA-B2 is the improved version of the alloy, MA-B. It has the same superior corrosion resistance as MA-B, while having an improved corrosion resistance against the knife-line-attack and in the heat-affected zone. Since MA-B2 has little carbide precipitation along the crystal grain boundaries of the welded heat-affected zone, this alloy can be used in the as-welded state for almost any chemical processes.

Since MA-B2 loses its ductility when it is exposed to temperatures between 538∼870°C, processing and use in this temperature range must be avoided. When using MA-B2 within oxidizing gases such as air, the temperature should be 538°C or lower. For use in reducing gases or vacuity, the alloy can be used at high temperatures, such as 870°C or higher.

MA-B2 is an original alloy provided only by Proterial, Ltd. Okegawa Works, has drastically improved the decreasing tendency of mechanical elasticity at medium temperatures, which used to be an initial problem.

Various shapes, such as flat-rolled plates, forgings, welding wires, wires, welded pipes and tubes, seamless pipes and tubes can be manufactured.

Information on specifications to which MA-B2 alloy can be ordered.