Hastelloy B2 & B3 Bolts – Global Suppliers & Exporters
Aurum Overseas is a trusted Hastelloy B2 & B3 Bolts Supplier, supplying corrosion-resistant nickel alloy bolting solutions to industrial customers across the USA, Europe, UAE, Saudi Arabia, and other global markets. These bolts are designed for demanding applications where aggressive chemical environments require materials that can deliver reliable long-term performance. Both UNS N10665 Bolts and UNS N10675 Bolts are widely used in chemical processing, petrochemical manufacturing, pollution control systems, and acid handling facilities. Their excellent resistance to reducing environments makes them suitable for applications involving hydrochloric acid and other severe process media.
As an experienced exporter, Aurum Overseas supports international projects with complete material traceability, inspection documentation, and export-standard packaging. We supply standard and custom-manufactured bolting solutions to meet the requirements of EPC contractors, equipment manufacturers, and industrial maintenance teams. Our focus on quality assurance, technical support, and dependable delivery has made us a preferred supplier of Nickel Alloy B2 Bolts and Nickel Alloy B3 Bolts for critical industrial applications worldwide.
UNS N10665 & UNS N10675 Bolts – Product Overview
Hastelloy B2 Bolts are manufactured from a nickel-molybdenum alloy developed specifically for exceptional resistance to reducing chemical environments, particularly hydrochloric acid. These fasteners are commonly selected for reactors, process vessels, and piping systems operating under severe corrosive conditions.
Hastelloy B3 Bolts offer similar corrosion resistance while providing improved thermal stability and enhanced fabrication characteristics. This advancement allows engineers greater flexibility when selecting materials for complex processing equipment and high-purity chemical applications.
Available in configurations such as hex bolts, stud bolts, heavy hex bolts, eye bolts, and custom designs, Nickel Alloy B2 & B3 Bolts are widely used in chemical processing plants, pharmaceutical facilities, pollution control systems, and petrochemical installations requiring dependable fastening performance. Their ability to withstand aggressive acids and reducing environments helps ensure equipment safety, operational reliability, and extended service life in the world's most challenging industrial applications.
Specifications of Hastelloy B2 & B3 Bolts
| Specification | Details |
|---|---|
| Grades | Hastelloy B2 / Hastelloy B3 |
| UNS Number | UNS N10665 / UNS N10675 |
| ASTM Standards | ASTM F467, ASTM F468, ASTM B446 |
| ASME Standards | ASME SF467, SF468, SB446 |
| International Standards | DIN, ASTM, BS, ANSI, ISO, JIS, UNI |
| Bolt Size | M3 – M56 |
| Imperial Sizes | 3/16" – 2" |
| Custom Sizes | Available |
| Length | 3 mm – 200 mm |
| Thread Types | UNC, UNF, Metric, BSW, BSF |
| Bolt Forms | Hex Bolts, Heavy Hex Bolts, Stud Bolts, Eye Bolts |
| Manufacturing Process | Hot Forged / CNC Machined |
| Certification | EN 10204 3.1 / MTC |
| Packaging | Export Standard Packaging |
Mechanical Properties of Hastelloy B2 & B3 Bolts
The mechanical performance of nickel alloy bolting materials is critical when selecting fasteners for highly corrosive chemical environments. Properties such as tensile strength, yield strength, hardness, and elongation help engineers determine the suitability of the material for pressure equipment, process systems, and critical industrial assemblies.
Mechanical Properties of UNS N10665 Bolts (Hastelloy B2)
| Property | Value |
|---|---|
| Tensile Strength | 110 ksi (760 MPa) |
| Yield Strength | 51 ksi (350 MPa) |
| Elongation | 40% |
| Hardness | Approx. 83 HRB |
| Density | 9.24 g/cm³ |
| Melting Range | 1330–1380°C |
Mechanical Properties of UNS N10675 Bolts (Hastelloy B3)
| Property | Value |
|---|---|
| Tensile Strength | 115 ksi (790 MPa) |
| Yield Strength | 52 ksi (360 MPa) |
| Elongation | 45% |
| Hardness | Approx. 85 HRB |
| Density | 9.22 g/cm³ |
| Melting Range | 1360–1410°C |
Both Hastelloy B2 and B3 provide excellent mechanical strength and ductility for critical industrial fastening applications.
Chemical Composition of Hastelloy B2 & B3 Bolts
The outstanding corrosion resistance of Hastelloy B2 Bolts and Hastelloy B3 Bolts is derived from their carefully balanced nickel-molybdenum chemistry. Understanding the elemental composition of these alloys helps buyers and engineers select the most appropriate material for hydrochloric acid processing, reducing environments, and other severe chemical applications.
Chemical Composition of Nickel Alloy B2 Bolts
| Element | Composition (%) |
|---|---|
| Nickel | Balance |
| Molybdenum | 26.0 – 30.0 |
| Iron | 2.0 Max |
| Chromium | 1.0 Max |
| Cobalt | 1.0 Max |
| Manganese | 1.0 Max |
| Silicon | 0.10 Max |
| Carbon | 0.02 Max |
Chemical Composition of Nickel Alloy B3 Bolts
| Element | Composition (%) |
|---|---|
| Nickel | Balance |
| Molybdenum | 28.0 – 32.0 |
| Iron | 1.5 – 3.0 |
| Chromium | 1.5 Max |
| Manganese | 3.0 Max |
| Silicon | 0.10 Max |
| Carbon | 0.01 Max |
| Aluminum | 0.50 Max |
The high molybdenum content in both grades contributes significantly to their excellent resistance to reducing acids and corrosive chemical environments.
Equivalent Grades of UNS N10665 & UNS N10675 Bolts
International projects often reference equivalent material standards depending on regional engineering requirements.
| Standard | Hastelloy B2 | Hastelloy B3 |
|---|---|---|
| UNS | N10665 | N10675 |
| ASTM | ASTM B333 | ASTM B335 |
| Material Family | Nickel-Molybdenum Alloy | Nickel-Molybdenum Alloy |
| Trade Name | Hastelloy B2 | Hastelloy B3 |
| Common Designation | Nickel Alloy B2 | Nickel Alloy B3 |
These equivalent designations help procurement teams align project specifications across different global markets.
Types of Nickel Alloy B2 & B3 Bolts Available for Industrial Applications
Industrial projects often require specialized bolt designs depending on pressure requirements, equipment geometry, and installation methods. Aurum Overseas supplies a comprehensive range of Hastelloy B2 Bolts and Hastelloy B3 Bolts suitable for both standard and custom engineering applications.
| Bolt Type | Typical Applications |
|---|---|
| Hex Bolts | Pressure vessels, piping systems, structural assemblies |
| Heavy Hex Bolts | High-load industrial connections |
| Stud Bolts | Flanged joints and refinery systems |
| Eye Bolts | Lifting and rigging applications |
| Socket Head Bolts | Precision equipment and confined spaces |
| Anchor Bolts | Equipment foundations and heavy installations |
| U-Bolts | Pipe support systems |
| Custom Bolts | Project-specific engineering requirements |
UNS N10665 & UNS N10675 Bolts Suppliers in Europe for Chemical Processing Industries
European industries operating in aggressive chemical environments rely on high-performance nickel alloy fastening systems that can withstand prolonged exposure to reducing acids and corrosive media. UNS N10665 Bolts and UNS N10675 Bolts are increasingly specified by chemical processors, specialty equipment manufacturers, and EPC contractors because of their outstanding corrosion resistance and dependable service life.
Aurum Overseas supplies Hastelloy B2 Bolts and Hastelloy B3 Bolts to customers across Germany, France, Italy, Spain, the Netherlands, Belgium, and the United Kingdom. These bolting solutions are used in chemical reactors, acid transfer systems, scrubbers, pharmaceutical processing equipment, and pollution control installations requiring certified materials and international quality documentation.
Nickel Alloy B2 & B3 Bolts Exporters in USA for Acid Processing Systems
The United States remains one of the largest markets for corrosion-resistant nickel alloy fasteners used in chemical manufacturing and industrial processing. Facilities handling hydrochloric acid and other reducing chemicals frequently specify Nickel Alloy B2 Bolts and Nickel Alloy B3 Bolts because of their proven reliability in severe service conditions.
As a trusted exporter, Aurum Overseas supports industrial buyers throughout Houston, New York, Chicago, Los Angeles, and other major manufacturing regions. Our UNS N10665 Bolts and UNS N10675 Bolts are supplied with complete inspection documentation, material traceability, and export packaging suitable for refinery upgrades, equipment manufacturing, and maintenance shutdown requirements.
Hastelloy B2 & B3 Bolts Suppliers in Gulf Countries for Petrochemical Projects
Petrochemical and industrial projects throughout the Gulf region demand fastening materials capable of resisting aggressive chemicals and challenging operating environments. Hastelloy B2 Bolts and Hastelloy B3 Bolts provide dependable performance in applications where reducing acids and process contaminants can compromise standard materials.
Aurum Overseas exports nickel alloy bolting solutions to UAE, Saudi Arabia, Qatar, Oman, Kuwait, and Bahrain. Our products support petrochemical complexes, specialty chemical plants, fertilizer facilities, and industrial processing projects requiring certified bolting systems with timely international delivery.
Why Industrial Buyers Choose Aurum Overseas for Nickel Alloy B2 & B3 Bolts
Aurum Overseas supports industrial buyers worldwide with high-quality Hastelloy B2 Bolts and Hastelloy B3 Bolts engineered for demanding chemical processing applications. Our focus on metallurgy, precision manufacturing, and quality assurance ensures reliable performance in severe corrosive environments.
With expertise in international logistics, inspection documentation, and custom manufacturing, we provide certified UNS N10665 Bolts and UNS N10675 Bolts tailored to the needs of EPC contractors, equipment manufacturers, maintenance teams, and industrial procurement specialists across global markets.
Industries Using UNS N10665 & UNS N10675 Bolting Solutions
The exceptional corrosion resistance of Nickel Alloy B2 & B3 Bolts makes them suitable for a wide range of critical industrial sectors handling aggressive process media.
| Industry | Typical Applications |
|---|---|
| Chemical Processing | Reactors, acid transfer systems, process vessels |
| Petrochemical | Corrosive process equipment and piping assemblies |
| Pollution Control | Scrubbers, emission control equipment |
| Pharmaceuticals | High-purity processing systems |
| Oil & Gas | Specialized chemical injection systems |
| Power Generation | Corrosion-resistant fastening assemblies |
| Fertilizer Plants | Acid handling and chemical processing units |
| Industrial Manufacturing | Equipment exposed to aggressive chemicals |
Hastelloy B2 vs Hastelloy B3 Bolts: Which Grade Should You Choose?
Both Hastelloy B2 Bolts and Hastelloy B3 Bolts are excellent choices for hydrochloric acid service and reducing chemical environments. However, understanding the differences between these grades helps engineers select the most appropriate material for their specific application requirements.
| Property | Hastelloy B2 Bolts | Hastelloy B3 Bolts |
|---|---|---|
| UNS Number | UNS N10665 | UNS N10675 |
| Alloy Type | Nickel-Molybdenum | Nickel-Molybdenum |
| Corrosion Resistance | Excellent in reducing environments | Excellent in reducing environments |
| Hydrochloric Acid Resistance | Outstanding | Outstanding |
| Thermal Stability | Good | Improved |
| Fabrication Characteristics | More sensitive during fabrication | Enhanced fabrication performance |
| Heat-Affected Zone Resistance | Moderate | Improved |
| Typical Applications | Acid processing equipment | Advanced chemical processing systems |
| Weldability | Good | Better than B2 |
| Preferred Selection | Established acid service | Modern equipment requiring improved stability |
Buyers dealing with mixed oxidizing and reducing media often evaluate Hastelloy C276 Bolts because of their broader corrosion resistance profile. Where exceptional resistance to oxidizing chemicals is required, Hastelloy C22 Bolts are also commonly considered as an alternative depending on process chemistry and operating conditions.
Frequently Asked Questions
1. What are Hastelloy B2 Bolts used for?
Hastelloy B2 Bolts are primarily used in chemical processing systems handling hydrochloric acid and
other reducing chemicals. They are commonly specified for reactors, pressure vessels, piping systems,
and pollution control equipment requiring superior corrosion resistance.
2. What are Hastelloy B3 Bolts used for?
Hastelloy B3 Bolts are used in similar corrosive environments but offer improved thermal stability and
fabrication characteristics. They are widely utilized in specialty chemical processing and equipment
manufacturing applications.
3. What is the difference between Hastelloy B2 and Hastelloy B3 Bolts?
Both grades provide excellent resistance to reducing acids. However, Hastelloy B3 Bolts offer enhanced
thermal stability and improved resistance to heat-affected zone corrosion, making them easier to
fabricate and process.
4. What are UNS N10665 Bolts?
UNS N10665 is the official designation for Hastelloy B2 Bolts, a nickel-molybdenum alloy known for
outstanding resistance to hydrochloric acid and reducing environments.
5. What are UNS N10675 Bolts?
UNS N10675 refers to Hastelloy B3 Bolts, an advanced nickel-molybdenum alloy designed to improve upon
the fabrication and thermal stability characteristics of earlier B-series alloys.
6. Are Nickel Alloy B2 & B3 Bolts suitable for hydrochloric acid service?
Yes. Both grades are specifically developed for hydrochloric acid environments and are widely recognized
for their exceptional performance in reducing chemical conditions.
7. Do you export Hastelloy B2 & B3 Bolts internationally?
Yes. Aurum Overseas exports these bolting solutions to the USA, Germany, France, Italy, UAE, Saudi
Arabia, Qatar, Oman, Kuwait, Bahrain, and other international markets with complete export
documentation.
Request a Quote for Hastelloy B2 & B3 Bolts
Looking for a reliable supplier of Hastelloy B2 Bolts and Hastelloy B3 Bolts for critical industrial applications? Aurum Overseas offers certified nickel alloy bolting solutions manufactured to international standards and tailored to your project requirements.
Contact our team today to request pricing, technical assistance, material certifications, or a customized quotation for UNS N10665 Bolts and UNS N10675 Bolts. We support industrial projects worldwide with competitive pricing, dependable quality, and efficient global delivery.
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