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Hastelloy C-276 Fasteners

Hastelloy C-276 Fasteners are made from a nickel-molybdenum-chromium alloy that provides exceptional resistance to severe corrosion and aggressive chemical media. They retain excellent strength and reliability in environments containing chlorides, acids, wet chlorine gas, oxidizing solutions, and elevated temperatures.
Hastelloy C-276 bolts, nuts, screws, studs, and washers are widely used in chemical processing, pollution control, petrochemical, marine, and power generation equipment. Their strong resistance to pitting, crevice corrosion, and stress corrosion cracking makes them ideal for critical fastening applications.

 

 

 

 

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Product Overview

Hastelloy C-276 Fasteners for High-Performance Applications

Explore detailed information for this alloy product, including specifications, applications, supply options and quotation requirements.

Why buyers choose Hastelloy C-276 Fasteners

Hastelloy C-276 Fasteners are made from a nickel-molybdenum-chromium alloy that provides exceptional resistance to severe corrosion and aggressive chemical media. They retain excellent strength and reliability in environments containing chlorides, acids, wet chlorine gas, oxidizing solutions, and elevated temperatures.
Hastelloy C-276 bolts, nuts, screws, studs, and washers are widely used in chemical processing, pollution control, petrochemical, marine, and power generation equipment. Their strong resistance to pitting, crevice corrosion, and stress corrosion cracking makes them ideal for critical fastening applications.

 

 

 

 

Hastelloy C-276 Fasteners
Pipe Specifications

Hastelloy C-276 Fasteners size range and supply information

Specifications, available sizes and delivery conditions can vary by production route and order requirements. Contact us for current availability.

Item Typical Options Buyer Notes Typical Specification
Material Grade Hastelloy C-276 / UNS N10276 / W.Nr. 2.4819 Confirm the alloy designation, chemical composition and certification requirements. Nickel-molybdenum-chromium alloy for severe corrosive environments
Fastener Type Hex bolts, heavy hex bolts, studs, threaded rods, nuts, washers or screws Specify the fastener type, thread form and complete assembly configuration. Fasteners for chemical processing, marine and pollution-control equipment
Size & Thread Metric, UNC, UNF, BSW or custom thread Provide nominal diameter, thread pitch, length and dimensional tolerances. Standard and custom sizes available according to drawings
Applicable Standard ASTM F467, ASTM F468, ASTM B574, ASTM B564, ASME SB574 or project specification Confirm the required fastener, material and dimensional standards before ordering. ASTM / ASME compliant products with full heat traceability
Strength Condition Annealed, solution annealed, cold worked or custom strength condition Match the condition to applied loads, service temperature and installation requirements. High strength with excellent resistance to pitting, crevice and stress corrosion
Surface Finish Plain, bright, pickled, passivated or coated Select the finish according to corrosion exposure and assembly requirements. Clean, uniform corrosion-resistant surface
Nut & Washer Matching Matching Hastelloy C-276 nuts and washers or compatible nickel alloy combinations Use compatible materials and suitable lubrication to reduce galling during assembly. Matched fastener sets available for reliable installation
Inspection & Certification MTC, PMI, chemical analysis, tensile test, hardness test, dimensional inspection and third-party inspection Confirm testing scope, documentation and lot traceability before quotation. EN 10204 3.1 certificate and batch traceability available

 

 

 

Standards

Common standards for Hastelloy C-276 Fasteners

The final standard should follow the purchase order, engineering specification or project drawing.

Product Type Common Standards Typical Use Inspection Notes
Hastelloy C-276 Bolts ASTM F468, ASTM B574 / ASME SB574 Chemical processing, pollution-control equipment, offshore systems and severe corrosion service Verify thread dimensions, tensile properties, hardness, PMI, surface condition and heat traceability.
Hastelloy C-276 Stud Bolts ASTM F468, ASTM B574 / ASME SB574, ASME B1.1 Flanged joints, pressure vessels, valves and highly corrosive piping systems Check thread fit, overall length, mechanical properties, PMI and material certificates.
Hastelloy C-276 Nuts ASTM F467, ASTM B574 / ASME SB574, ASME B18.2.2 Matching nuts for nickel-alloy bolts and studs in chemical and marine environments Confirm thread compatibility, proof load or hardness, dimensions and material traceability.
Hastelloy C-276 Screws ASTM F468, ASME B18 Series, customer specifications Pumps, valves, scrubbers, instrumentation and corrosion-resistant equipment Inspect head geometry, drive condition, thread accuracy, mechanical properties and surface defects.
Hastelloy C-276 Washers ASME B18.21.1, DIN 125 / ISO 7089, customer specifications Load distribution and joint protection in wet chlorine, acid and sour-service environments Verify outside diameter, inside diameter, thickness, flatness, PMI and surface condition.
Custom Hastelloy C-276 Fasteners ASTM B574 / ASME SB574, ASTM F467 / F468, customer drawings Special connections for chemical, pharmaceutical, marine and pollution-control equipment Review drawings, machining tolerances, heat treatment, NDT, mechanical testing and inspection certificates.

 

 

 

Chemical Composition

Hastelloy C-276 Fasteners composition reference

Chemical composition is reported by heat on the material test certificate. Use the table below as a material-selection reference.

Element Symbol Typical Requirement Function
Nickel Ni Balance Forms the alloy matrix and provides toughness and broad corrosion resistance.
Molybdenum Mo 15.0-17.0 Enhances resistance to pitting, crevice corrosion, and reducing acids.
Chromium Cr 14.5-16.5 Improves resistance to oxidizing media and localized corrosion.
Iron Fe 4.0-7.0 Provides controlled alloy balance and contributes to fastener strength.
Tungsten W 3.0-4.5 Improves localized corrosion resistance and high-temperature strength.
Cobalt Co 2.5 max Controlled residual element in the nickel-based alloy.
Manganese Mn 1.0 max Acts as a deoxidizer during alloy production.
Vanadium V 0.35 max Contributes to strengthening and microstructural stability.
Silicon Si 0.08 max Controlled to maintain ductility, surface quality, and fastening reliability.
Carbon C 0.010 max Minimized to reduce carbide precipitation and preserve corrosion resistance.
Copper Cu 0.50 max Controlled minor element supporting alloy stability.

 

 

 

Mechanical Properties

Mechanical Properties of Hastelloy C-276 Fasteners

Mechanical properties vary by standard, pipe size, production route and heat treatment. Use the specified standard and MTC as the final acceptance basis.

Condition / Product Tensile Strength Yield Strength 0.2% Elongation Notes
Annealed Hastelloy C-276 bolts / studs 690 MPa min reference 283 MPa min reference 40% min reference Common reference condition for severe chemical-processing and corrosion-resistant fasteners.
Cold-worked Hastelloy C-276 bolts / studs By fastener class, diameter, and specification By fastener class, diameter, and specification Lower than annealed condition Cold working increases strength and hardness while reducing ductility.
Hastelloy C-276 nuts By applicable fastener specification By applicable fastener specification By applicable fastener specification Specify proof load, hardness, thread class, and compatibility with mating fasteners.
Custom Hastelloy C-276 fasteners By customer requirement and applicable standard By customer requirement and applicable standard By customer requirement and applicable standard Confirm heat treatment, thread form, dimensional tolerance, inspection, and material traceability.

 

 

 

Values shown are reference data for product selection. Purchase orders should define the exact standard, condition, inspection scope and certificate requirement.

Quotation Checklist

Information to confirm for your order

Share your requirements, including material, size, quantity, and specifications, for a fast quotation.

Material

Grade name, UNS number, equivalent grade or project material code.

Pipe Size

OD / NPS, wall thickness or schedule, length, tolerance and quantity.

Standard

ASTM, ASME, EN, DIN, drawing or customer specification.

Condition

Seamless, welded, annealed, solution annealed, pickled or polished.

Inspection

MTC EN10204 3.1, PMI, UT / ET, hydrotest and dimensional report.

Delivery

Destination, packing requirement, shipping method and delivery deadline.

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FAQ

Frequently asked questions about Hastelloy C-276 Fasteners

FAQ content helps cover buyer questions and supports SEO for long-tail product searches.

Hastelloy C-276 Fasteners are used in chemical processing, pollution-control equipment, flue gas desulfurization, marine systems, oil and gas, pharmaceutical and highly corrosive environments.

Available products include bolts, nuts, screws, studs, washers, threaded rods, U-bolts and custom fasteners manufactured according to drawings or project specifications.

Common standards include ASTM F468 for non-ferrous alloy bolts, screws and studs, ASTM F467 for nuts, and ASME SF468 and ASME SF467 equivalents. DIN, ISO, ANSI and customer standards are also available.

Hastelloy C-276 Fasteners are available in metric and imperial sizes with UNC, UNF, UNEF, BSW, BSF and other thread forms. Custom dimensions and thread specifications can also be supplied.

Yes. Hastelloy C-276 Fasteners can be supplied with an EN10204 3.1 material certificate, heat number traceability, chemical composition, mechanical test results and PMI inspection when required.

Please provide the fastener type, Hastelloy grade, size, thread specification, length, quantity, standard, surface finish, certificate requirements and destination.

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