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Applications of Hastelloy B2 Products

Views: 3 Author: Wang Publish Time: 2024-01-26 Origin: Site

Hastelloy B2

Hastelloy B2 is a solid solution strengthened, nickel-molybdenum alloy typically used in extreme reducing conditions. Hastelloy B2 has signiﬁcantly lower carbon, silicon and iron compared to the predecessor, alloy B. Compared to alloy B, Hastelloy B2 is less susceptible to weld zone corrosion in the as-welded condition. Controlling other alloying elements such as iron and chromium resolved potential issues with forming and shaping. Stringent chemistry control in the production of Hastelloy B2 allows the alloy to be used in the welded condition, and it is less susceptible to stress corrosion cracking under many conditions. Care must be taken in selecting the right alloy for the desired application. Alloy B2 should not be used at temperatures between 1000°F and 1600°F as the alloy forms secondary phases that could decrease the ductility of the material.

Chemical properties of Hastelloy B2

Hastelloy B2 is composed of iron (Fe), chromium (Cr), cobalt (Co), manganese (Mn), molybdenum (Mo), nickel (Ni), nitrogen (N) and silicon (Si). The iron content ranges from 29% to 33%, the chromium content ranges from 19% to 23%, the cobalt content ranges from 0% to 1%, the manganese content ranges from 1% to 3%, the molybdenum content ranges from 2% to 4%, the nickel content ranges from 57% to 61%, the nitrogen content ranges from 0.24% to 0.35%, and the silicon content ranges from 0.08% to 0.20%. The composition provides this alloy with its superior strength, toughness, and corrosion resistance properties.

Mechanical Properties of Hastelloy B2

Because of alloy B2 is a nickel-molybdenum alloy with significant resistance to reducing environments, such as hydrogen chloride gas and sulphuric, acetic and phosphoric acids. Therefor Hastelloy B2 provides resistance to pure sulphuric acid and a number of non-oxidizing acids. The alloy should not be used in oxidizing media or where oxidizing contaminants are available in reducing media. Premature failure may occur if alloy B2 is used where ferric iron, cupric ion and free chlorides are present.

Hastelloy B2 has poor corrosion resistance to oxidizingenvironments, therefore, it is not recommended for use in oxidizing media or in the presence of ferric or cupric salts because they may cause rapid premature corrosion failure. These salts may develop when hydrochloric acid comes in contact with iron and copper. Therefore, if this alloy is used in conjunction with iron or copper piping in a system containing hydrochloric acid, the presence of these salts could cause the alloy to fail prematurely. In addition, this nickel steel alloy should not be used at temperatures between 1000° F and 1600° F because of a reduction in the ductility in the alloy.

But in ordinary circumstances Hastelloy B2 has excellent mechanical properties including superior tensile strength, yield strength, elongation, hardness, creep resistance, fatigue strength, impact strength, wear resistance, abrasion resistance and corrosion resistance in a wide range of organic acids as well as sulfuric acid solutions. It also exhibits good oxidation resistance up to 1800°F as well as good formability up to temperatures between 1400°F – 1900°F. Its low carbon content makes it easier for welding than other alloys with similar compositions while its high nickel content enhances weldability even further by improving weld penetration and providing uniformity in heat treatment across multiple production runs.

Applications for Hastelloy B2 products

Chemical Processing: Hastelloy B2 sheets are used in a variety of industries due to their superior corrosion resistance and strength. These sheets are commonly used in chemical processing plants because they resist the effects of sulfuric acid, hydrochloric acid, phosphoric acid, and chlorides. Other common applications include exhaust manifolds, valve bodies, pump components, nuclear steam generators, pressure vessels, heat exchangers and more. These sheets have a good finish that makes them suitable for decorative purposes, in addition to being used in industrial applications.

Aerospace: It is also used for producing fasteners like bolts or screws due to its superior mechanical properties such as excellent tensile strength or creep resistance which helps ensure safety during operation or transportation under extreme conditions such as high temperature or pressure. Additionally, it can be used for manufacturing parts for aircraft engines due to its superior formability at elevated temperatures ranging between 1400°F – 1900°F which allows for easier shaping without compromising on quality or performance during operation under extreme conditions such as high altitude flight operations where air pressure is relatively low compared to ground level air pressure.

Oil and Gas: In the oil and gas industry, it is used in sweetening units, sour gas wells and offshore platforms where corrosion resistance is essential. Hastelloy B2 nickel alloy is a wise choice for sour gas service components because of its ability to resist corrosion, and subsequently, promote the future of the oil and gas industry. Hydrogen sulfide is especially corrosive when it is present in water. This causes sulfide stress cracking which can significantly damage equipment. Compressors for sour gas services must be able to resist corrosion in order to keep up with the demand for natural gas as a source of energy. The removal of hydrogen sulfide in oil refineries or natural gas production plants is referred to as "sweetening," and must be done before the raw natural gas can be used. The properties of Hastelloy B2 make it resistant to sour environments, even at high temperatures.

In conclusion, This alloy has been used in a variety of industries In the pharmaceutical industry, it is the first choice for applications involving exposure to aggressive chemicals. In power generation, Hastelloy B2 is used in turbines and heat exchangers where high temperature and corrosion resistance are required. Its resistance to seawater and aggressive marine environments makes it an excellent choice for marine applications such as shipbuilding. Hastelloy B2 is an ideal choice for many chemical processing applications due to its superior corrosion-resistant properties against many organic acids combined with its excellent formability at elevated temperatures allowing it to be easily shaped into components without sacrificing quality or performance under extreme conditions like high temperature or pressure operations which make it an ideal choice for producing parts like pumps valves, heat exchangers, tanks, or fasteners like bolts or screws. Its low carbon content makes it easier for welding while its high nickel content enhances weldability even further which enables production runs that are consistent in terms of quality across multiple batches.

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