Hastelloy Fasteners | Ni-Cr-Mo-Fe Alloys

Hastelloy® B2

Hastelloy® B2 is a nickel-molybdenum alloy engineered for outstanding resistance to strong reducing agents, particularly hydrochloric acid in all concentrations and temperatures. In fastener applications, Hastelloy® B2 offers excellent resistance to hydrogen chloride gas, sulfuric acid, acetic acid, and phosphoric acid, while maintaining good mechanical strength. Common Hastelloy® B2 fasteners include hex bolts, nuts, studs, washers, socket head cap screws, and custom chemical-resistant fittings. These fasteners are ideal for environments where contamination from corrosion could compromise equipment integrity. Industries utilizing Hastelloy® B2 fasteners include chemical processing, petrochemical, pharmaceutical manufacturing, pollution control, and marine engineering. They are frequently employed in reactors, heat exchangers, evaporators, and piping systems that handle aggressive chemical media. Although not suitable for strong oxidizing environments, Hastelloy® B2’s resistance to pitting, stress corrosion cracking, and knife-line attack makes it a preferred choice for critical fastening solutions in harsh, reducing chemical service.

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Hastelloy® C-22

Hastelloy® C-22 is a nickel-chromium-molybdenum-tungsten alloy engineered for exceptional resistance to a wide variety of corrosive environments, including both oxidizing and reducing chemicals. It offers superior protection against pitting, crevice corrosion, and stress corrosion cracking, even in aggressive oxidizers like wet chlorine, nitric acid, and ferric or cupric chlorides. In fastener applications, Hastelloy® C-22 provides reliable performance where chemical exposure and mechanical integrity are critical. Common fasteners include hex bolts, nuts, washers, studs, and socket head cap screws, often used in equipment handling mixed acid streams and chloride-laden environments. Industries such as chemical processing, pharmaceutical manufacturing, pulp and paper, pollution control, and marine engineering rely on C-22 fasteners for reactors, heat exchangers, scrubbers, evaporators, and piping systems. Its versatility and broad-spectrum corrosion resistance make Hastelloy® C-22 a top choice for critical fastening solutions that must withstand the most aggressive and unpredictable chemical service conditions.

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a chemical composition of hastelloy c-22

Hastelloy C-276

Hastelloy® C-276 is a nickel-molybdenum-chromium alloy with added tungsten, designed for outstanding corrosion resistance in the most severe chemical environments. It excels in resisting strong oxidizers, reducing agents, and mixed chemical conditions, making it one of the most versatile corrosion-resistant alloys available. In fastener applications, C-276 is known for its exceptional resistance to pitting, crevice corrosion, and stress corrosion cracking, even in hot, contaminated, or chloride-rich solutions. Common fasteners include hex bolts, nuts, washers, studs, and socket head cap screws, often specified for use in harsh chemical processing equipment. Industries such as chemical manufacturing, pollution control, marine engineering, pulp and paper, and waste treatment rely on Hastelloy® C-276 fasteners in reactors, scrubbers, heat exchangers, evaporators, and piping systems. Its ability to withstand both oxidizing and reducing environments, along with long-term structural reliability, makes Hastelloy® C-276 a premier choice for mission-critical fastening applications in aggressive and unpredictable service conditions.

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Hastelloy® G-30

Hastelloy® G-30 is a high-performance nickel-chromium-iron-molybdenum-copper alloy designed for exceptional resistance to strong oxidizing acids, particularly nitric acid and nitric/sulfuric acid mixtures. Its enhanced chromium content provides superior protection against oxidizing chemicals, while molybdenum and copper improve resistance to reducing agents. In fastener applications, Hastelloy® G-30 offers both excellent corrosion resistance and reliable mechanical strength in aggressive chemical environments. Common fasteners made from Hastelloy® G-30 include hex bolts, nuts, studs, washers, and socket head cap screws, often used in equipment exposed to mixed acid conditions. Industries that utilize Hastelloy® G-30 fasteners include chemical processing, fertilizer production, pollution control, pulp and paper, and nuclear waste treatment. These fasteners are commonly installed in heat exchangers, scrubbers, evaporators, and piping systems handling highly corrosive media. With its ability to withstand a wide range of oxidizing and reducing chemicals, Hastelloy® G-30 is a premium choice for critical fastening applications where both strength and long-term corrosion resistance are essential.

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Hastelloy® X

Hastelloy® X is a nickel-based superalloy known for its exceptional strength, oxidation resistance, and stability at elevated temperatures. Composed primarily of nickel, iron, chromium, and molybdenum, it maintains excellent mechanical properties and fabricability, making it a preferred choice for demanding environments. Industries such as aerospace, power generation, chemical processing, and petrochemical rely heavily on Hastelloy® X for components exposed to extreme heat and corrosive conditions. It is widely used in gas turbine engines, jet aircraft parts, combustion chambers, industrial furnaces, and heat-treating equipment, where resistance to oxidation and carburization is critical. Additionally, Hastelloy® X is employed in nuclear reactors, where its thermal stability and durability provide reliable performance under intense operating conditions. To meet fastening needs in these applications, a variety of fasteners are manufactured from Hastelloy® X, including bolts, screws, nuts, washers, and studs. These fasteners ensure long-term integrity in high-stress, high-temperature, and corrosive environments, where standard alloys would fail. Available in custom and standard configurations, Hastelloy® X fasteners are essential for securing critical assemblies in aerospace engines, chemical reactors, and high-performance industrial systems. By combining superior mechanical performance with resistance to oxidation and corrosion, Hastelloy® X continues to be a material of choice across multiple high-technology sectors.

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Hastelloy® X-750

Hastelloy® X-750 is a precipitation-hardenable nickel-chromium alloy renowned for its high strength, oxidation resistance, and corrosion resistance at elevated temperatures. Strengthened by additions of titanium and aluminum, it maintains excellent mechanical properties from cryogenic conditions up to about 1,300°F (704°C). In fastener applications, Hastelloy® X-750 is valued for its ability to resist creep, stress rupture, and oxidation in extreme heat and corrosive environments. Common fasteners include hex bolts, nuts, studs, washers, socket head cap screws, and aerospace-grade locking fasteners. These are widely used in gas turbines, jet engines, nuclear reactors, heat-treating equipment, and petrochemical processing plants. Industries such as aerospace, power generation, chemical processing, and marine engineering rely on X-750 fasteners for critical applications requiring both heat resistance and corrosion protection. Its combination of high-temperature strength, oxidation resistance, and structural stability makes Hastelloy® X-750 a premium choice for mission-critical fastening solutions in some of the most demanding service environments.

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a chemical composition of hastelloy x750

Haynes® 230

Haynes® 230 is a high-performance nickel-chromium-tungsten-molybdenum alloy designed for outstanding strength, oxidation resistance, and thermal stability at elevated temperatures. With excellent resistance to nitriding, carburization, and long-term thermal exposure, it is widely used in industries that demand reliability under severe conditions. Aerospace, power generation, chemical processing, and industrial heating are the primary sectors that utilize Haynes® 230 for mission-critical components. In aerospace, the alloy is applied in jet engine combustors, afterburners, and transition ducts, where it withstands extreme heat and mechanical stress. In the power generation sector, Haynes® 230 is used in gas turbine components, burners, and combustion hardware, offering durability and efficiency at high service temperatures. Its corrosion resistance also makes it valuable in chemical processing, furnace equipment, and heat-treatment systems where exposure to oxidizing and carburizing environments is constant. Fasteners made from Haynes® 230—including bolts, nuts, screws, studs, and washers—are essential for securing structural and mechanical assemblies in these harsh applications. These fasteners retain strength and dimensional stability while resisting oxidation and creep deformation, even during prolonged high-temperature service. With its unique combination of mechanical strength and corrosion resistance, Haynes 230 has become a preferred alloy for critical fasteners and components across high-temperature, high-performance industries.

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Haynes® 242

Haynes® 242 is a nickel-molybdenum-chromium alloy engineered for excellent strength, oxidation resistance, and remarkable thermal stability at intermediate to high service temperatures. Unlike many superalloys, it is particularly valued for its exceptional low thermal expansion characteristics, making it well-suited for precision applications where dimensional stability is critical. Industries such as aerospace, chemical processing, power generation, and automotive rely on Haynes 242 for components that demand both durability and controlled thermal response. In aerospace, it is applied in gas turbine engines, combustion hardware, and exhaust systems, where strength and thermal fatigue resistance are essential. In power generation and chemical processing, the alloy is used in recuperators, heat exchangers, and reaction vessels exposed to aggressive oxidizing and reducing environments. Automotive manufacturers also utilize Haynes® 242 for turbocharger and high-performance engine components due to its stability under cyclic heating conditions. Fasteners produced from Haynes® 242—including bolts, screws, nuts, studs, and washers—are integral in maintaining the structural integrity of critical systems exposed to high temperature and corrosive atmospheres. These fasteners provide long-term resistance to creep, stress relaxation, and oxidation, ensuring reliable performance over extended service lives. With its unique blend of mechanical stability, corrosion resistance, and thermal control, Haynes 242 remains a trusted material for advanced fastening solutions in demanding industries.

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Inconel® 686

Inconel® 686 is a nickel-chromium-molybdenum alloy specifically designed to provide outstanding resistance to a wide range of severe corrosive environments. With its high nickel content and additions of chromium, molybdenum, and tungsten, it exhibits superior resistance to pitting, crevice corrosion, and stress-corrosion cracking in both oxidizing and reducing conditions. This makes Inconel® 686 a highly versatile material across industries where chemical exposure and mechanical strength must coexist. The chemical processing industry relies heavily on Inconel® 686 for reactors, heat exchangers, evaporators, piping systems, and pollution control equipment due to its ability to withstand aggressive acids, including sulfuric, hydrochloric, and nitric. In marine environments, it is applied in seawater handling equipment and offshore oil and gas platforms, where its durability prevents degradation under continuous exposure to chloride-rich conditions. Power generation and pharmaceutical industries also use this alloy in critical equipment requiring long-term corrosion protection. Fasteners made from Inconel® 686—such as bolts, screws, nuts, studs, and washers—play a vital role in securing structural and mechanical systems operating in these harsh environments. These fasteners retain mechanical integrity while resisting corrosion, preventing failure where conventional alloys would degrade. By combining excellent strength with unparalleled corrosion resistance, Inconel® 686 fasteners ensure reliability in the world’s most demanding industrial applications.

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Waspaloy®

Waspaloy® is a nickel-based superalloy renowned for its exceptional strength, oxidation resistance, and stability at high temperatures, particularly in the range of 1200–1600°F (650–870°C). With a composition rich in nickel, cobalt, chromium, and molybdenum, Waspaloy® offers excellent resistance to creep, fatigue, and stress rupture, making it ideal for extreme aerospace and power generation environments. The aerospace industry is the primary user of Waspaloy®, where it is applied in gas turbine engines for compressor disks, shafts, seals, spacers, and turbine blades that operate under continuous high stress and heat. In addition, it is used in industrial gas turbines, nuclear reactors, and petrochemical processing equipment where durability and corrosion resistance are vital. Waspaloy® is also valued in defense applications for critical hardware requiring long-term strength retention at elevated temperatures. To support these applications, a wide range of fasteners are manufactured from Waspaloy®, including bolts, screws, nuts, studs, and washers. These fasteners are designed to maintain structural integrity under high stress, resist oxidation, and prevent deformation during extended service at elevated temperatures. Their reliability makes them indispensable in securing engine components, turbine assemblies, and high-performance equipment. With its proven high-temperature strength and oxidation resistance, Waspaloy® remains a material of choice for critical fasteners and structural components in advanced industries.

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a chemical composition picture of Waspaloy