Hastelloy B2 is a nickel molybdenum alloy that entered the market in the 1940s and 1929. It is the earliest solid solution strengthened nickel molybdenum alloy. Hastelloy B2 exhibits excellent salt and acid resistance at all concentrations and temperatures. Hastelloy B2 can be used at temperatures up to 540 ℃ (1000 ℉). Alloys can be used at temperatures ranging from 815 ° C (1500 ° F) to higher in reducing gas or vacuum. When yan acid comes into contact with iron or copper, it may produce iron or copper salts, so Hastelloy B2 should not be used with copper or iron pipelines in systems containing yan acid.
Hastelloy B2 Product Form and Execution Standards:
Product – ASTM Standard – ASME Standard
Thin sheets, plates, and strips – B333- SB333
Seamless pipe – B622- SB622
Welded pipes – B619, B626- SB619, SB626
Bar and cake materials – B335- SB335
Forging – B564- SB564
Hastelloy B2 chemical composition: Ni：69，Mo：28，Fe：2.0，Cr：1.0，Co：1.0，C：0.02，Mn：1.0，Si：0.1，P：0.04，S：0.03。
Hastelloy B2 Physical properties: Density: 9.24g/cm ³ Melting point: 1330-1380 ℃
Hastelloy B2 corrosion resistance:
Hastelloy B2 nickel molybdenum alloy has extremely low carbon and silicon content, which reduces the precipitation of carbon and other impurities in the welding heat affected zone. Therefore, its welds also have sufficient corrosion resistance.
Hastelloy B2 alloy exhibits excellent corrosion resistance in reducing media, such as hydrochloric acid solutions at various temperatures and concentrations. It also has good corrosion resistance in medium concentration sulfuric acid solution (or containing a certain amount of chloride ions). It can also be used in environments with acetic acid and phosphoric acid.
Hastelloy B2 alloy material can only have the best corrosion resistance when it is in a suitable metallographic state and has a pure crystal structure.
