Broad Chemical Resistance
Hastelloy alloys provide reliable resistance across a wide range of aggressive chemical and process environments.
Specialty Alloy Fasteners
Hastelloy Fasteners Manufacturer
High-performance Hastelloy bolts, stud bolts and custom fasteners engineered for chemical, acid and highly corrosive industrial applications.
Nickel-Molybdenum Alloy Expertise
C-276 and B-3 fasteners for reducing, oxidizing and highly corrosive process environments.
Advanced Corrosion Resistance
Grade-specific corrosion resistance for aggressive chemical environments.
Custom Manufacturing
Standard and drawing-based Hastelloy fasteners manufactured to project-specific dimensions and requirements.
Overview
Hastelloy Fasteners for Highly Corrosive Chemical Environments
Hastelloy is a family of nickel-based corrosion-resistant alloys designed for demanding chemical and industrial environments. Hastelloy C-276 is a nickel-chromium-molybdenum-tungsten alloy offering broad resistance in both oxidizing and reducing environments, together with excellent resistance to pitting and crevice corrosion. Hastelloy B-3 is a nickel-molybdenum alloy developed primarily for reducing-acid environments. It provides excellent resistance to hydrochloric and sulfuric acids together with improved thermal stability compared with earlier B-type alloys.
Why Choose This Material
Why Hastelloy Is Selected for Critical Fastening Applications
Hastelloy combines broad chemical resistance, localized-corrosion protection and grade-specific performance for severe industrial fastening environments.
Pitting & Crevice Resistance
C-276 provides excellent resistance to pitting and crevice corrosion in chloride-bearing and contaminated process media.
Reducing-Acid Resistance
B-3 provides excellent resistance to hydrochloric, sulfuric and other strongly reducing acid environments.
Flexible Grade Selection
C-276 and B-3 provide different corrosion profiles for mixed chemical media and specialized reducing-acid service.
Hastelloy Alloy Expertise
C-276 and B-3 provide different corrosion-resistant solutions for mixed chemical media and strongly reducing acid environments.
Hastelloy C-276
UNS:
N10276
EN / W.Nr.:
2.4819
Standards
- ASTM B574
- ASTM B564
- NACE MR0175
- ISO 15156
Characteristics
- Broad oxidizing and reducing media resistance
- Excellent pitting and crevice resistance
- Good chloride SCC resistance
Applications
Chemical processing, Pollution control, Acid production, Offshore equipment
Hastelloy B-3
UNS:
N10675
EN / W.Nr.:
2.4600
Standards
- ASTM B335
- ASTM B564
- ASME SB-335
- ASME SB-564
Characteristics
- Excellent hydrochloric acid resistance
- Excellent sulfuric acid resistance
- Improved thermal stability
Applications
Hydrochloric acid service, Sulfuric acid systems, Acetic acid processing, Chemical equipment
Other Hastelloy Grades Available
Additional Hastelloy grades can be reviewed according to customer drawings, project specifications and actual chemical service conditions.
Chemical Composition of Hastelloy Alloys
Compare the principal alloying elements of C-276 and B-3 and the compositional differences that determine their corrosion performance.
| GRADE | NI (%) | CR (%) | MO (%) | FE (%) | W (%) | C (%) | OTHER (%) |
|---|---|---|---|---|---|---|---|
| Hastelloy C-276 | Balance | 16.0 | 16.0 | 5.0 | 4.0 | 0.01 max | Co 2.5 max, Mn 1.0 max, V 0.35 max, Si 0.08 max |
| Hastelloy B-3 | 65.0 min | 1.5 | 28.5 | 1.5 | 3.0 max | 0.01 max | Co 3.0 max, Mn 3.0 max, Si 0.10 max, Al 0.50 max |
Reference values are provided for general comparison only. The governing material specification and batch MTC take precedence for production and acceptance.
Mechanical Performance of Hastelloy Alloys
C-276 and B-3 provide reliable room-temperature strength together with high ductility in the solution-annealed condition.
| GRADE / CONDITION | TENSILE STRENGTH (MPA) | 0.2% YIELD STRENGTH (MPA) | ELONGATION (%) |
|---|---|---|---|
| C-276 — Solution-Annealed Plate Reference | Approx. 785 | Approx. 365 | Approx. 59 |
| B-3 — Solution-Annealed Plate Reference | Approx. 883 | Approx. 400 | Approx. 58 |
Mechanical properties depend on product form, dimensions, material condition, heat treatment and the applicable specification. The purchase specification and actual inspection certificate shall govern the order.
Hastelloy Grade Selection Guide
Choose C-276 for broad mixed-media corrosion resistance and B-3 for specialized strongly reducing acid environments.
| Application Requirement | Recommended Grade |
|---|---|
| Broad chemical process service | Hastelloy C-276 |
| Mixed oxidizing and reducing media | Hastelloy C-276 |
| Pitting and crevice corrosion resistance | Hastelloy C-276 |
| Pollution-control and scrubber systems | Hastelloy C-276 |
| Non-oxidizing hydrochloric acid service | Hastelloy B-3 |
| Strongly reducing sulfuric acid service | Hastelloy B-3 |
| Reducing-acid service with improved thermal stability | Hastelloy B-3 |
| Chemical media containing oxidizing contaminants | Evaluate C-276 and the full service conditions |
Hastelloy Fastener Product Range
Hastelloy fasteners are available in standard and custom configurations for chemical, acid-processing and highly corrosive industrial applications.
Hastelloy Hex Bolts
Product Type: Hex Head Bolts / Full Thread Hex Bolts / Partial Thread Hex Bolts / Custom Hex Bolts
Size Range: Standard / Custom
Thread System: Metric / UNC / UNF
Thread Type: Coarse / Fine
Standard: ISO / DIN / ASME, as applicable, or customer drawings.
Documentation: MTC / EN 10204 3.1
Hastelloy Heavy Hex Bolts
Product Type: Heavy Hex Bolts / Large Diameter Heavy Hex Bolts / Custom Heavy Hex Bolts
Size Range: Standard / Custom
Thread System: Metric / UNC / UNF
Thread Type: Coarse / Fine
Standard: ISO / DIN / ASME, as applicable, or customer drawings.
Documentation: MTC / EN 10204 3.1
Hastelloy Stud Bolt
Product Type: Fully Threaded Studs / Double End Studs / Tap End Studs / Flange Stud Sets
Size Range: Standard / Custom
Thread System: Metric / UNC / UNF / 8UN
Thread Type: Coarse / Fine
Standard: ISO / DIN / ASME, as applicable, or customer drawings.
Documentation: MTC / EN 10204 3.1
Hastelloy Nuts
Product Type: Hex Nuts / Heavy Hex Nuts / Custom Nuts
Size Range: Matched to Bolt / Stud Size
Thread System: Metric / UNC / UNF
Thread Type: Coarse / Fine
Standard: ISO / DIN / ASME, as applicable, or customer drawings.
Documentation: MTC / EN 10204 3.1
Hastelloy Washers
Product Type: Flat Washers / Heavy Washers / Custom Washers
Size Range: Standard / Custom
Inner Diameter: Standard / Custom
Outer Diameter: Standard / Custom
Thickness: Standard / Custom
Standard: ISO / DIN / ASME, as applicable, or customer drawings.
Documentation: MTC / EN 10204 3.1
Hastelloy Socket Head Cap Screws
Product Type: Socket Head Cap Screws / Custom Socket Screws
Size Range: Standard / Custom
Thread System: Metric / UNC / UNF
Thread Type: Coarse / Fine
Standard: ISO / DIN / ASME, as applicable, or customer drawings.
Documentation: MTC / EN 10204 3.1
Hastelloy Threaded Rods
Product Type: Fully Threaded Rods / Cut-to-Length Threaded Rods
Size Range: Standard / Custom
Thread System: Metric / UNC / UNF
Thread Type: Coarse / Fine
Standard: ISO / DIN / ASME, as applicable, or customer drawings.
Documentation: MTC / EN 10204 3.1
Custom Hastelloy Fasteners & Machined Components
Product Type: Custom Bolts / Special Studs / Threaded Parts / Machined Components
Size Range: According to Drawing
Tolerance: According to Drawing
Manufacturing Basis: Customer Drawing / Project Specification
Inspection: Dimensional / PMI / Mechanical Testing as Required
Need a Product Type Not Shown Here?
We also manufacture custom and project-specific fasteners according to drawings, specifications or application requirements.
Process Control
Manufacturing Excellence
A controlled six-stage production workflow supports consistent manufacturing from reviewed raw material to finished, identified and export-ready specialty-alloy fasteners.
01
Raw Material Preparation
The specified alloy grade, product form, material condition and batch identity are reviewed before cutting. Stock is prepared according to the order and selected manufacturing route.
02
Cutting & Blanking
Bars, rods or forgings are cut to the required blank size while maintaining material separation and batch identification.
03
Forging / CNC Machining
Headed fasteners are forged and machined when appropriate, while complex, low-volume or drawing-based components can be produced by precision CNC machining.
04
Thread Manufacturing
Threads are rolled or cut according to material condition, product geometry, dimensional standard and customer requirements.
05
Heat Treatment
Solution treatment, annealing, age hardening or other thermal processing is applied only when required by the alloy grade, material condition and governing specification.
06
Finishing & Packing
Finished parts are deburred, cleaned and prepared as specified, then identified and packed according to order and traceability requirements.
Quality Control
Quality Assurance & Full Traceability
Inspection and documentation are planned around the purchase specification, customer drawing and intended service. The agreed inspection scope is confirmed according to individual project requirements.
Material Verification
Material grade, heat or lot number and incoming documents are checked against the agreed order requirements before production.
Heat Number Traceability
Batch identity is maintained through production, inspection and packing so finished parts can be linked to their source material.
Dimensional Inspection
Critical dimensions, tolerances and product geometry are checked against the applicable dimensional standard or customer drawing.
Thread Inspection
Thread size, pitch and fit are verified using suitable gauges and measuring equipment. Additional profile verification can be arranged when specified.
PMI & Mechanical Testing
PMI, hardness, tensile or other testing can be performed or arranged when specified, depending on the material, test method and project requirements.
MTC / EN 10204 3.1 Documentation
MTC / EN 10204 3.1 documentation, dimensional reports, PMI reports and traceability records can be supplied when specified and applicable.
Inspection methods, sampling plans, acceptance criteria and document requirements should be confirmed before order placement.
Discuss Inspection & Documentation RequirementsIndustries Served
Applications & Industries
Our specialty-alloy fasteners support demanding projects across multiple industries. Final material selection must be based on the actual temperature, corrosion medium, mechanical load, applicable standards and required service life.
Oil & Gas
Flange bolting, valves, pressure equipment, piping systems and process units exposed to pressure, temperature or corrosive media.
Chemical Processing
Reactors, heat exchangers, scrubbers, pumps and equipment handling acids, chlorides or other aggressive process media.
Power Generation
Gas and steam turbines, boilers, furnaces, heat-treatment systems and high-temperature mechanical assemblies.
Marine & Offshore
Offshore platforms, seawater systems, marine equipment and desalination installations requiring corrosion-resistant fastening.
Aerospace
Engine, thermal and precision assemblies requiring high strength, temperature capability, low weight or controlled material performance.
Nuclear & Critical Equipment
Safety-critical bolting and engineered components requiring controlled materials, documentation and reliable long-term performance.
Not every alloy is suitable for every industry or service condition. Material suitability should be confirmed against the governing specification and actual operating environment.
Discuss Your ApplicationFrequently Asked Questions
Common questions about specialty-alloy fasteners, custom manufacturing, standards, inspection, documentation and procurement.
1. What specialty-alloy fastener products can you manufacture?
Our product range includes hex bolts, heavy hex bolts, stud bolts, nuts, washers, socket head cap screws, threaded rods and drawing-based fasteners or machined components. Availability depends on material grade, dimensions and quantity.
2. Can you manufacture non-standard parts from customer drawings?
Yes. We can review drawings for custom bolts, studs, nuts, washers, threaded parts and precision machined components. The quotation is based on material, dimensions, tolerances, heat treatment, inspection requirements and order quantity.
3. Which dimensional and thread standards can you support?
Products can be manufactured to applicable ISO, DIN, ASME and other recognized dimensional standards, or to customer drawings. Metric, UNC, UNF and other thread systems can be evaluated according to the product and specification.
4. Can you provide MTC and EN 10204 3.1 documentation?
Material test certificates and EN 10204 3.1 documentation can be supplied when specified and applicable to the ordered material and product. Certificate requirements should be confirmed before order placement.
5. Is PMI or third-party inspection available?
PMI and third-party inspection can be arranged when required. The test method, sampling plan, acceptance criteria and reporting requirements should be defined before production.
6. How do you maintain material traceability?
Heat or lot identification is maintained from incoming material through production, inspection and packing, subject to the agreed order and documentation requirements.
7. Can you supply bolts, nuts and washers as matched bolting sets?
Yes. Complete bolting sets can be supplied when requested, with thread compatibility, material selection, inspection and packaging defined for the order.
8. What are your MOQ and lead time?
MOQ and lead time depend on alloy grade, raw-material availability, product size, manufacturing route, heat treatment, testing and order quantity. Made-to-order specialty-alloy fasteners normally require a technical review before confirmation.
Request for Quotation
Custom & Standard
Hastelloy Fasteners,
Direct From
Manufacturer.
Send us your Hastelloy fastener specifications, standards or drawings. Our engineering team will review your requirements and provide a detailed project-specific quotation.
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EN 10204 3.1
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