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HASTELLOY C276 FASTENERS | ULTIMATE GUIDE & MANUFACTURER
Ananka Fasteners is a premier manufacturer and supplier of high-quality Hastelloy C276 Fasteners (UNS N10276 / W.Nr. 2.4819). Engineered for the most extreme environments, this nickel-molybdenum-chromium-tungsten superalloy offers unparalleled resistance to harsh chemical processing, sour gas environments, and severe localized corrosion, making it the ultimate fastening solution for critical industrial infrastructure.
■ Complete Range of Hastelloy C276 Fasteners
As a master manufacturer, we produce a comprehensive range of Alloy C276 fasteners spanning from micro-instrumentation to heavy nuclear pressure vessel construction.
| Bolts & Screws | Nuts & Washers | Studs & Rods |
|---|---|---|
| Hex Bolts / Heavy Hex Bolts | Standard Hex Nuts / Heavy Hex Nuts | Fully Threaded Studs (DIN 976) |
| Socket Head Cap Screws | Prevailing Torque Locknuts | Double Ended Studs |
| Flange Bolts / Shoulder Bolts | Flat Washers / Spring Washers | Threaded Rods / Tie Rods |
| U-Bolts / J-Bolts / Set Screws | Belleville Washers | Custom CNC Machined Studs |
■ Standard Product Pages
Explore our dedicated standard pages for specific fastener categories to view detailed dimensions, availability, and specific technical data:
- Hastelloy C276 Bolts: Comprehensive range of heavy hex, flange, and socket head configurations.
- Hastelloy C276 Nuts: View our dedicated page for standard hex, heavy hex, and prevailing torque locknuts.
- Hastelloy C276 Washers: Comprehensive range of flat, spring, and Belleville washers for critical load distribution.
- Hastelloy C276 Stud Bolts: High-strength, precision-machined stud bolts engineered for secure, critical flanged connections in extreme temperature and corrosive environments.
- Hastelloy C276 Threaded Rods: Versatile, fully-threaded fastening solutions providing exceptional resistance to pitting and stress-corrosion cracking in aggressive chemical processing and offshore applications.
■ Hastelloy C276 Material Specifications
| Material Equivalent Grades | UNS N10276 | W.Nr. 2.4819 | Alloy C276 | AFNOR NC 17 D | JIS NW 0276 |
|---|---|
| Standard Specifications | ASTM F468 / ASME SF468 (Nonferrous Bolts & Studs) ASTM F467 / ASME SF467 (Nonferrous Nuts) ASTM B574 (Rod & Bar) / ASTM B564 (Forgings) |
| Size Range | Metric: M2 to M160 | Imperial: 3/16" to 4" Custom machined lengths up to 1500 mm available. |
| Thread Types | UNC, UNF, Metric Coarse, Metric Fine, BSW, BSF |
| Dimensional Standards | DIN (931/933/912/934), ISO (4017), ASME B18.2.1, B18.2.2 |
■ Chemical Composition of Alloy C276
| Ni (Nickel) | Mo (Molybdenum) | Cr (Chromium) | Fe (Iron) | W (Tungsten) | Co (Cobalt) | Mn (Manganese) | C (Carbon) | Si (Silicon) |
|---|---|---|---|---|---|---|---|---|
| 57.0% Bal | 15.0 - 17.0% | 14.5 - 16.5% | 4.0 - 7.0% | 3.0 - 4.5% | 2.50% Max | 1.0% Max | 0.010% Max | 0.08% Max |
■ Mechanical & Physical Properties
| Tensile Strength (Min) | Yield Strength 0.2% Offset (Min) | Elongation (%) | Density | Melting Range |
|---|---|---|---|---|
| 690 MPa (100 ksi) | 283 MPa (41 ksi) | 40% Min | 8.89 g/cm³ | 1325 - 1370°C |
■ Torque & Installation Guidelines (UNC Threads)
To proactively counteract galling and achieve an accurate, highly predictable tension-to-torque relationship, the application of engineered high-temperature nickel-compatible anti-seize lubricants is functionally mandatory during assembly.
| Nominal Diameter | Threads Per Inch (UNC) | Target Torque - Dry (ft-lbs) | Target Torque - Lubricated (ft-lbs) |
|---|---|---|---|
| 1/2" | 14 | 26.3 | 19.8 |
| 5/8" | 11 | 79.9 | 60.0 |
| 3/4" | 10 | 142.0 | 107.0 |
| 1" | 8 | 343.0 | 257.0 |
■ Key Characteristics & Industrial Applications
With a Pitting Resistance Equivalent Number (PREN) exceeding 45, Hastelloy C276 offers robust, long-term protection against severe reducing media (hydrochloric and hydrobromic acids), oxidizing environments (wet chlorine gas), and complete immunity to chloride-induced stress corrosion cracking.
- Chemical & Petrochemical Processing (CPI): Organic chloride synthesis, active halide catalysts, and boiling acetic/formic acid reactors.
- Power Generation: Flue Gas Desulfurization (FGD) scrubber stack liners, dampers, and bypass ducts handling hot, highly acidic slurries.
- Oil & Gas Exploration: Subsea manifolds, blow-out preventers (BOPs), and downhole tooling requiring compliance with NACE MR0175 / ISO 15156 for sour gas (H₂S) service.
- Pulp, Paper & Pharmaceuticals: Digesters, bleach plant pipelines, and high-temperature steam sterilization autoclaves.