In the world of industrial fastening, where failure is not an option, Hastelloy fasteners are the definitive solution for extreme corrosion challenges. Fabricated from nickel-molybdenum-chromium superalloys, these fasteners provide exceptional resistance to pitting, crevice corrosion, and stress-corrosion cracking in harsh chemical and high-temperature environments. When standard stainless steels and even other nickel alloys fail, Hastelloy bolts, Hastelloy nuts, and Hastelloy studs deliver unparalleled reliability and longevity.

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Product Overview

Our range of Hastelloy fasteners is manufactured from premier grades like Hastelloy C-276, Hastelloy C-22, and Hastelloy B2, each engineered for specific corrosive threats. These alloys maintain their structural integrity in both oxidizing and reducing atmospheres, making them the ultimate choice for critical applications.

Our product line includes:

· Hastelloy Bolts & Screws: High-strength threaded fasteners designed for securing equipment in corrosive processing units.

· Hastelloy Nuts: Precision-machined to ensure perfect mating with bolts, preventing galling and seizing under stress.

· Hastelloy Washers: Provide reliable load distribution and sealing, protecting flange surfaces from crevice corrosion.

· Hastelloy Stud Bolts: The standard for flanged connections in piping systems, reactors, and pressure vessels handling aggressive media.

· Hastelloy Threaded Rods: Offer versatility for custom fabrication, support structures, and hanging systems in corrosive environments.

· Hastelloy Socket Head Cap Screws: Ideal for applications with space constraints, offering high tensile strength and a clean profile.

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Applications Across Industries

1. Chemical Processing Industry (CPI):

· Hastelloy C-276 stud bolts and Hastelloy nuts are essential in reactors, distillation columns, and piping systems exposed to chlorine, acetic acid, and other aggressive catalysts.

2. Pollution Control & Flue Gas Desulfurization (FGD):

· Hastelloy C-22 screws and Hastelloy washers provide superior resistance to wet chlorine gas, chlorides, and sulfur compounds in scrubbers, ducting, and fan systems.

3. Pharmaceutical & Fine Chemical Manufacturing:

· Hastelloy B2 fasteners are used in vessels and piping where resistance to hydrochloric acid and other reducing acids at elevated temperatures is critical for purity and safety.

4. Oil & Gas (Upstream & Downstream):

· Hastelloy C-276 bolts are deployed in sour gas environments (containing H₂S), offshore platforms, and in equipment handling corrosive crude oils.

5. Pulp & Paper Industry:

· Used in digesters, bleach plants, and piping where equipment is exposed to corrosive chlorine dioxide and other bleaching chemicals.

6. Waste Treatment:

· Hastelloy threaded rods and fasteners offer excellent performance in systems handling mixed acids and waste streams.

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Key Factors for Selecting Hastelloy Fasteners

Choosing the correct grade is paramount for performance and safety:

1. Specific Corrosive Media:

· Hastelloy C-276: The most versatile grade for mixed acids, chlorides, and oxidizing environments.

· Hastelloy C-22: Enhanced resistance to oxidizing chemicals and localized corrosion compared to C-276.

· Hastelloy B2: Optimized for resistance to reducing acids like hydrochloric and sulfuric, but vulnerable to oxidizing agents.

2. Temperature Considerations:

· While excellent at high temperatures, the specific chemical environment changes with heat. Confirm the alloy's performance under your application's operating temperature.

3. Mechanical Requirements:

· Ensure the fastener's tensile strength, yield strength, and hardness meet the mechanical load requirements of the connection.

4. Galvanic Compatibility:

· Always pair Hastelloy bolts with Hastelloy nuts and Hastelloy washers to prevent galvanic corrosion that can occur when dissimilar metals contact each other in a corrosive electrolyte.

5. Certifications and Standards:

· Insist on fasteners that comply with ASTM/ASME standards (e.g., ASTM B574) and come with full Material Test Reports (MTRs) for traceability and quality assurance.

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Why Choose Our Hastelloy Fasteners?

Our products are precision-engineered from certified materials, undergoing stringent quality control and heat-treatment processes to ensure they meet the highest performance standards. We provide complete traceability and certifications for every batch.

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Don't let corrosion compromise your integrity. Contact our experts today to select the right Hastelloy fasteners for your application and request a competitive quote.