Material: Hastelloy Fasteners – Built to Withstand the Harshest Environments
Overview:
Hastelloy® is a premium nickel-molybdenum, nickel-chromium, or nickel-iron alloy designed for superior resistance against aggressive chemical attacks, including oxidizing and reducing agents. It is highly effective in acidic, high-temperature, and high-stress conditions where traditional stainless steels fail.
At SM Fasteners, we manufacture and supply a wide range of Hastelloy fasteners including bolts, nuts, studs, washers, and custom components that are used in corrosive and high-performance industries around the world.
Why Choose Hastelloy Fasteners?
Hastelloy fasteners are engineered for performance in extreme chemical processing conditions:
✅ Unmatched resistance to strong oxidizers and reducers
✅ Immune to pitting, crevice corrosion, and stress corrosion cracking
✅ Stable mechanical properties in high temperature and pressure
✅ High strength-to-weight ratio
✅ Compatible with welding and fabrication processes
Popular Grades We Offer
Hastelloy C-276 (UNS N10276)
Excellent resistance to strong oxidizers, acids, and chloridesHastelloy C-22 (UNS N06022)
Superior versatility against oxidizing and reducing environmentsHastelloy B-2 / B-3 (UNS N10665 / N10675)
High molybdenum content for hydrochloric acid resistance
Chemical Composition (Hastelloy C-276)
| Element | % Composition |
|---|---|
| Nickel (Ni) | Balance |
| Molybdenum (Mo) | 15 – 17 |
| Chromium (Cr) | 14.5 – 16.5 |
| Iron (Fe) | 4.0 – 7.0 |
| Tungsten (W) | 3.0 – 4.5 |
| Cobalt (Co) | ≤ 2.5 |
| Manganese (Mn) | ≤ 1.0 |
| Carbon (C) | ≤ 0.010 |
| Silicon (Si) | ≤ 0.08 |
Mechanical Properties (Hastelloy C-276 – Annealed)
| Property | Value |
|---|---|
| Tensile Strength | ≥ 690 MPa |
| Yield Strength (0.2%) | ≥ 283 MPa |
| Elongation | ≥ 40% |
| Hardness (Brinell) | ~ 230 HB |
| Max Operating Temp | ~ 1040°C |
Applications of Hastelloy Fasteners
Engineered for extremely corrosive and hazardous conditions, Hastelloy fasteners are used in:
Chemical Processing Plants: Reactors, columns, heat exchangers
Pharmaceutical Equipment: Bioreactors, fermenters, tanks
Pulp and Paper Industry: Digesters, bleach towers
Waste Treatment Facilities: Chlorine scrubbers, incinerators
Nuclear and Aerospace: Fuel handling, exhaust systems
Marine & Offshore: Desalination, seawater cooling systems
Types of Hastelloy Fasteners Available
Hex Bolts
Hex Nuts & Heavy Hex Nuts
Fully Threaded Studs
Double Ended Studs
Socket Cap Screws
Eye Bolts, U-Bolts, L-Bolts
Washers (Flat, Spring, Belleville)
Custom Fasteners as per drawing/spec
Packaging & Delivery
At SM Fasteners, our Hastelloy fasteners are carefully packaged to maintain purity and traceability:
Packed in moisture-resistant VCI bags
Export-grade plywood crates or HDPE boxes
Each package labeled with grade, quantity, heat number, and specs
Timely shipping via sea or air, with global reach
Certifications & Documentation
We ensure complete transparency and traceability with every order:
Mill Test Certificate – EN 10204 3.1 / 3.2
Third-Party Inspection (TUV, Lloyds, SGS)
Chemical & Mechanical Test Reports
Material Traceability Records
Compliance with ASTM B574 / ASME / DIN / ISO
Request a Quotation or Expert Support
Have a complex or urgent requirement? Connect with our materials team now:
📧 Email: susheel@smfastners.com
📞 Phone: +91 8968469570
💬 WhatsApp Chat
🧷 SM Fasteners – Trusted Supplier of Hastelloy Fasteners in India & Worldwide
From acid processing plants to nuclear applications, we deliver fasteners that perform where others fail. Count on SM Fasteners for certified quality and prompt service, no matter how harsh the challenge.