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Hastelloy C276 Fasteners Supplier in Mumbai, India – Bolts, Nuts & Screws
Nicorex Alloys is a supplier, importer and stockist of Hastelloy C276 fasteners in Mumbai, India. Products are supplied in accordance with ASTM F468 (bolts/studs) and ASTM F467 (nuts), with bar stock as per ASTM B574.
The mechanical properties include tensile 690 MPa (100 ksi), yield 283 MPa (41 ksi) and elongation 40%. We offer Hastelloy C276 hex bolts, stud bolts, SHCS, nuts, lock nuts, washers, threaded rods, U-bolts, anchor bolts, set screws and eye bolts in sizes M6–M100 and 1/4”–4”. All fasteners are in accordance with NACE MR0175 and supported by ISO 9001 and ISO 14001 certifications. Wet chlorine gas destroys every austenitic stainless steel bolt in service. Hastelloy C276 fasteners resist it. The balanced 57% Ni, 16% Cr, 16% Mo, and 4% W composition handles both oxidising and reducing media in a single alloy. Alloy C-276 (UNS N10276, Werkstoff 2.4819) bolting withstands wet chlorine, ferric chloride, hot contaminated mineral acids, and mixed-acid environments simultaneously.
The 3.0–4.5% tungsten addition distinguishes C276 from other C-family alloys. Tungsten works with 16% molybdenum to provide exceptional reducing-acid resistance in H₂SO₄ and HCl service. Ultra-low carbon (0.01% max) and silicon (0.08% max) prevent carbide and intermetallic precipitation during welding, so C276 bolts retain full corrosion resistance in as-welded flange assemblies.
Hastelloy C276 Fastener Specifications
| ASTM / ASME Standard | ASTM B574 / ASME SB-574 |
|---|---|
| Forms | Bolts, Nuts, Screws, Washers, Studs, Threaded Rods, Hex Bolts, Socket Head Cap Screws, Hex Nuts, Lock Nuts, Stud Bolts |
| Size | M6 – M100 (Metric); 1/4″ – 4″ (Imperial) |
| Length | 3 mm – 200 mm; Custom lengths available |
| Diameter | M6 – M100 (Metric); 1/4″ – 4″ (Imperial) |
| Thread Types | UNC, UNF, Metric Coarse, Metric Fine, BSW, BSF |
| Surface Finishes | Bright Finish, Pickled, Passivated, Hot-Dip Galvanized, Electropolished |
| Available Conditions | Solution Annealed |
Chemical Composition of Hastelloy C276 Fasteners
| Element | Nickel (Ni) | Chromium (Cr) | Molybdenum (Mo) | Tungsten (W) | Iron (Fe) | Cobalt (Co) | Vanadium (V) | Carbon (C) | Silicon (Si) |
|---|---|---|---|---|---|---|---|---|---|
| Composition (%) | 57.0 min (balance) | 14.5–16.5 | 15.0–17.0 | 3.0–4.5 | 4.0–7.0 | 2.5 max | 0.35 max | 0.01 max | 0.08 max |
Mechanical Properties of Hastelloy Alloy C276 Fasteners
| Element | Nickel (Ni) | Molybdenum (Mo) | Chromium (Cr) | Tungsten (W) | Iron (Fe) | Cobalt (Co) | Vanadium (V) | Silicon (Si) | Carbon (C) |
|---|---|---|---|---|---|---|---|---|---|
| Content (wt%) | Balance | 15.0 – 17.0 | 14.5 – 16.5 | 3.0 – 4.5 | 4.0 – 7.0 | 2.5 max | 0.35 max | 0.08 max | 0.01 max |
Alloy C276 Fastener Equivalent Grades
| Standard System | UNS | Werkstoff Number | DIN | EN | JIS |
|---|---|---|---|---|---|
| Equivalent Grade | N10276 | 2.4819 | NiMo16Cr15W | NiMo16Cr15W | NW0276 |
Always specify ASTM F468 for finished C276 fasteners, not B574 (bar stock). F468 carries fastener-specific mechanical requirements and testing.
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Types of Hastelloy C276 Fasteners Available
Hastelloy C276 Hex Bolts
N10276 Stud Bolts
Hastelloy C276 Socket Head Cap Screws
C276 Hex Nuts
Hastelloy C276 Lock Nuts
Alloy C276 Flat Washers
Hastelloy C276 Threaded Rods
W.Nr 2.4819 U-Bolts
Hastelloy C276 Set Screws
C276 Eye Bolts
Surface Finish and Coating Options for Hastelloy C276 Bolting Materials
- Plain / Self-Colour: Standard; C276 inherently corrosion resistant
- Passivated: Acid passivation to remove surface iron contamination
- PTFE Coated: Thread coating for anti-galling and consistent torque-tension
- Manganese Phosphate: Anti-galling thread treatment
- Silver Plated: For high-temperature anti-seize on reactor studs (up to 650°C)
- Anti-Seize: Nickel-based anti-seize mandatory for all Ni-Cr-Mo alloy assemblies
Industries and Applications for Hastelloy C276 Fasteners
- FGD (flue gas desulfurization): Scrubber vessel flange studs, damper shaft bolting, spray nozzle assemblies, ductwork flange fasteners.
- Chemical processing: Reactor vessel closure studs in H₂SO₄, HCl, and HF mixed service. Heat exchanger tubesheet bolting, acid storage tank flange fasteners.
- Pulp and paper: Bleach plant equipment bolting in ClO₂ and hypochlorite service, digester closure studs, chemical recovery boiler fasteners.
- Oil and gas/petrochemical: Sour gas wellhead valve bonnet studs (NACE MR0175), amine unit bolting, crude distillation tray fasteners.
- Pharmaceutical and fine chemical: High-purity reactor bolting, mixer shaft fasteners, agitated vessel closure studs.
- Water treatment and desalination: Chlorination system hardware, RO membrane housing bolts and brine heater flange studs.
How to Order Hastelloy C276 Fasteners from Nicorex Alloys
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Fastener Type - Hex Bolt, Stud Bolt, Socket Head Cap Screw, Nut, Washer, Threaded Rod, Anchor Bolt
-
Size - Diameter × Length in mm or inches
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Thread Type - UNC, UNF, BSW, Metric Coarse/Fine
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Material Grade - Hastelloy C276 / UNS N10276
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Standard - ASTM F468 / ASTM F467 / ASME SB574
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Finish - Bare, Passivated, Pickled
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Condition - Solution Annealed
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Quantity - Number of Pieces or kg
- Additional Requirements - NACE MR0175 compliance, specific heat numbers, chemical processing / pulp & paper service
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Documentation - MTC 3.1 per EN 10204, PMI report, third-party inspection certificate
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Packaging - Standard wooden box / export-grade sea-worthy packing / ISPM 15 compliant
- Delivery Destination - Domestic / International
Frequently Asked Questions
What is the Price of Hastelloy C276 Fasteners per Kg in India?
Why is Hastelloy C276 called the ‘Universal’ Corrosion-Resistant Bolting Material?
What is the difference between Hastelloy C276 and C22 Fasteners?
How do you prevent Galling in Hastelloy C276 Bolt-Nut Assemblies?
What Test Certificates should be supplied with C276 Fasteners?
Standard: EN 10204 Type 3.1 MTC with chemical composition, mechanical properties, heat number and lot traceability. Critical applications: EN 10204 3.2 (inspected by a third party). PMI, intergranular corrosion (ASTM G28), NACE hardness verification, and impact testing are some of the other tests that are done.