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Hastelloy X Fasteners Supplier in Mumbai, India
Nicorex Alloys is an ISO 9001/ISO 14001 certified supplier, importer, and stockist of Hastelloy X fasteners (Alloy X or Nicrofer 4722) in Mumbai, India. We offer a wide variety of strong Hastelloy X parts made according to ASTM B572 standards, which guarantee excellent resistance to oxidation and maintain their strength for important high-temperature uses in aerospace and gas turbine parts.
Hastelloy X is not a corrosion alloy. It is a high-temperature alloy built for oxidising atmospheres between 650-1100°C (1200-2000°F). It is engineered to withstand carburising and nitriding atmospheres; Hastelloy X fasteners are the primary choice for hot-section service. Hastelloy X fasteners retain structural integrity and oxidation resistance at temperatures where those grades lose all strength. Gas turbine combustor bolts, parts for industrial furnaces, and supports for petrochemical reformer tubes need this alloy because Hastelloy X fasteners can handle the extreme heat in these areas for a long time.
Hastelloy X fasteners, including hex and stud bolts, socket head cap screws, nuts, washers, threaded rods, U-bolts, and eye bolts, are produced using UNS N06002 (Werkstoff 2.4665). The alloy combines approximately 47% nickel, 22% chromium, 18.5% iron, 9% molybdenum, 1% cobalt, 0.6% tungsten, and a remarkably high level of carbon content between 0.05% and 0.15% to enhance creep resistance. The parts are required to provide a yield strength of at least 240 MPa (35 ksi) with about 35% elongation, with a tensile strength of about 690 MPa (100 ksi) at room temperature and 490 MPa at 649°C. Sizes vary from M6 to M100 (1/4” to 4”). Specifications include ASTM B572 for bar stock and AMS 5754 for aerospace.
Hastelloy X Fastener Specifications
| Standard | ASTM B572 / ASME SB-572 |
|---|---|
| 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 Galvanised, Electropolished |
| Available Conditions | Solution Annealed |
Chemical Composition of Hastelloy X Fasteners
| Element | Nickel (Ni) | Chromium (Cr) | Iron (Fe) | Molybdenum (Mo) | Cobalt (Co) | Tungsten (W) | Carbon (C) | Silicon (Si) | Manganese (Mn) | Phosphorus (P) | Sulphur (S) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Composition (%) | Balance (~47) | 20.5–23.0 | 17.0–20.0 | 8.0–10.0 | 0.5–2.5 | 0.2–1.0 | 0.05–0.15 | 1.0 max | 1.0 max | 0.04 max | 0.03 max |
Mechanical Properties of Hastelloy X Fasteners
| Property | Tensile Strength (min) | Yield Strength 0.2% (min) | Elongation (min) | Hardness (max) |
|---|---|---|---|---|
| Value | 655 MPa (100 ksi) | 240 MPa (35 ksi) | 35% | 241 HB (~96 HRB) |
| Temperature | 538°C (1000°F) | 649°C (1200°F) | 760°C (1400°F) | 871°C (1600°F) |
|---|---|---|---|---|
| Tensile (MPa) | ~530 | ~490 | ~430 | ~260 |
| Yield (MPa) | ~210 | ~205 | ~195 | ~170 |
Retained tensile of 490 MPa at 649°C makes Hastelloy X suitable for gas turbine combustor bolting. At that temperature, C276 and C22 would have lost most structural integrity.
Hastelloy X Fastener Equivalent Grades
| Standard System | UNS | Werkstoff Number | DIN | EN | JIS |
|---|---|---|---|---|---|
| Equivalent Grade | N06002 | 2.4665 | NiCr22Fe18Mo | NiCr22Fe18Mo | NCF 2 |
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Types of Hastelloy X Fasteners Available
Hastelloy X Hex Bolts
Hastelloy Alloy X Stud Bolts
UNS N06002 Socket Head Cap Screws
Hastelloy X Hex Nuts
Hastelloy X Lock Nuts
Hastelloy X Flat Washers
Hastelloy Alloy X Threaded Rods
UNS N06002 U-Bolts
Hastelloy X Set Screws
Hastelloy X Eye Bolts
Surface Finish and Coating Options for Hastelloy X Fasteners
- Plain / Self-Colour: Standard for high-temperature service (coatings burn off)
- Passivated: Acid passivation for storage/shipping corrosion prevention
- Silver Plated: High-temperature anti-seize for turbine bolting (effective to 760°C)
- Molybdenum Disulfide (MoS₂): Dry lubricant for high-temp thread lubrication
- Ceramic Coated: Thermal barrier coating for extreme radiant heat protection
- Anti-Seize: Nickel-based anti-seize for assembly; silver-based for sustained high-temp
CRITICAL: PTFE coatings are NOT suitable for Hastelloy X service temperatures (PTFE degrades above 260°C). Nylon lock features will melt. For high-temperature service, use all-metal lock designs and silver or MoS₂ thread lubricants only.
Industries and Applications for Hastelloy X Fasteners
- Combustor can liner bolts, transition duct fasteners, afterburner flame holder studs, exhaust collector ring bolts, and turbine shroud segments. Hastelloy X is the industry standard for hot-section bolting at 650–870°C.
- Furnace muffle bolts, retort door studs, radiant tube hanger rods, heat-treat basket/fixture bolts, and walking beam furnace fasteners. Hastelloy X resists carburising and nitriding atmospheres that embrittle 304/316 stainless steel.
- Reformer tube outlet header studs, pyrolysis heater tube hangers, ethylene cracker bolting, catalyst regenerator fasteners. Gas turbine hot-section bolting, HRSG duct fasteners. Ammonia converter studs, methanol reactor bolting, and sulfur recovery unit fasteners.
How to Order Hastelloy X Fasteners from Nicorex Alloys
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Fastener Type - Hex Bolt, Stud Bolt, Socket Head Cap Screw, Nut, Washer, Threaded Rod, Anchor Bolt
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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 X / UNS N06002
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Standard - ASTM F468 / ASTM F467 / AMS 5754
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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
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Additional Requirements - Specific Heat Numbers, High-Temperature Service, Gas Turbine / Aerospace Application
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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 X Fasteners per Kg in India?
Prices range ₹3,000–₹6,500/kg depending on type, size, and specification. AMS 5754 aerospace-grade fasteners carry a 15–20% premium over ASTM B572 due to additional testing and certification.
Is Hastelloy X Suitable for Gas Turbine Engine Bolting?
Yes. Hastelloy X is the industry standard for combustor zone fasteners: combustion can liners, transition ducts, flame holders, and afterburners. Oxidation resistance, thermal fatigue strength, and ductility retention at 650–870°C make it the reference alloy for hot-section bolting.
Why Does Hastelloy X Have Higher Carbon Than C-Family Alloys?
Can Hastelloy X Fasteners Be Used in Carburising Furnace Atmospheres?
Yes. The Ni-Cr-Fe combination resists carbon pickup from endothermic gas, natural gas, and other carbon-bearing furnace atmospheres. This makes Hastelloy X ideal choice for heat-treat fixture bolts, retort studs, and basket fasteners where standard 304/316 stainless would embrittle.