HASTELLOY X FASTENERS — DATASHEET, CHEMICAL COMPOSITION, MECHANICAL PROPERTIES & SUPPLY

Ananka Fasteners is a premier manufacturer and global exporter of Hastelloy X Fasteners (UNS N06002 / W.Nr. 2.4665), an advanced matrix-stiffened nickel-chromium-iron-molybdenum superalloy. Engineered for extreme thermal stability, Hastelloy X is a foundational material for high-performance fasteners subjected to rigorous thermal cycling and aggressive atmospheric degradation in aerospace and petrochemical processing.

The defining advantage of UNS N06002 is its exceptional solid-solution strengthened matrix, providing a superior combination of oxidation resistance, fabricability, and high-temperature strength without relying on complex precipitation-hardening. It maintains excellent ductility and toughness even after 16,000 hours of continuous exposure at temperatures up to 870°C (1600°F), making it immune to the catastrophic brittle fractures often seen in aged gamma-prime alloys.

Every Hastelloy X fastener manufactured by Ananka is produced using precision CNC machining and controlled hot forging. We utilize specialized high-vanadium powdered metal tooling to overcome the alloy's rapid work-hardening nature. All supplies are backed by EN 10204 Type 3.1 Material Test Certificates and full compliance with ASTM F468 and AMS 5754. We supply mission-critical hardware for gas turbine combustors, afterburners, and industrial furnace components worldwide.

Every lot of Hastelloy X fasteners shipped by Ananka is accompanied by a highly detailed EN 10204 Type 3.1 Manufacturer Test Certificate (MTC), ensuring absolute metallurgical pedigree traceable back to the originating vacuum-melted ingot.

Each MTC documents:

• Actual chemical analysis confirming strict Ni-Cr-Fe-Mo ratios and trace element limits.
• Complete mechanical tests for yield, ultimate tensile strength, and elongation (at ambient and high temp).
• Creep-rupture life data and stress-rupture benchmarks (per customer requirements).
• Dimensional inspection data and thread-gauge certification.

The alloy relies on atomic radii disparities between Nickel, Chromium, and Molybdenum to create strain fields that pin dislocation movements. Iron is incorporated to enhance forgeability, while Cobalt and Tungsten provide high-temperature structural stability.

Hastelloy X exhibits a wide margin between yield and tensile strength, ensuring significant plastic yielding (stretching) rather than brittle snapping under overload conditions. It retains excellent ductility even at cryogenic temperatures (-196°C).

Creep & Stress-Rupture Strength

For high-temperature bolting, creep is the primary design constraint. To prevent joint loosening over 10,000 hours, axial stress must be strictly managed. For example, at 816°C (1500°F), the stress required to produce 1.0% creep over 10,000 hours is 35 MPa (5.1 ksi).

Hastelloy X fasteners are utilized where system failure would result in catastrophic environmental damage or severe plant downtime.

• Aerospace Gas Turbines: Transition ducts, combustor cans, flame holders, and afterburner assemblies where thermal cycling is extreme.
• Industrial Furnaces: Securing retorts, muffles, and furnace baffles exposed to oxidizing, reducing, and neutral atmospheres at temperatures >1177°C.
• Petrochemical Processing: Profound resistance to carburization and nitriding in pyrolysis operations and furnace internal hardware.
• Nuclear Power: Mandated for environments requiring extreme microstructural stability and resistance to high-temperature embrittlement.

• Hastelloy X Bolts: Heavy hex and socket head configurations per ISO 4017 and ASME B18.2.1.
• Hastelloy X Nuts: High-temp hex nuts ensuring thread shear resistance exceeds bolt tensile strength.
• Hastelloy X Washers: Precision stamped flat and spring washers for thermal cycling loads.
• Hastelloy X Studs: Uncompromising standard for turbine hot-section flange connections.

Hastelloy X possesses a machinability rating of only 16% compared to free-machining steel, demanding rigid setups and advanced tooling.

• Galling Warning: High-nickel threads are extraordinarily susceptible to galling (cold-welding). Dry installation is strictly prohibited. You must use Molybdenum Disulfide (MoS₂) or graphite anti-seize to drop the K-factor from ≈ 0.18 to ≈ 0.08.
• CNC Machining: CVD-coated carbides or SiAlON whisker ceramics are mandatory. Operations must maintain a positive, continuous feed to ensure the tool stays beneath the rapid work-hardened zone.
• Thread Rolling: Rolled threads are vastly superior to cut threads as they induce compressive residual stresses in the roots, significantly enhancing the fastener's fatigue life in vibrating machinery.
• Thermal Conductvity: Due to low conductivity (9.2 W/m·°C), bolts expand slower than flanges during startup. This creates a transient preload spike that must be accounted for to prevent bolt yielding.

• Specialized PM Tapping: We utilize high-vanadium powdered metal (PM) taps and pitch-controlled attachments to produce internal threads that meet aerospace tolerances without tool breakage.
• Strict Thermal Protocols: All fasteners undergo solution heat treatment at 1177°C (2150°F) followed by rapid cooling to restore peak ductility and corrosion resistance.
• High-Temperature Lubrication: We provide pre-applied MoS₂ or graphite coatings to eliminate installation galling and ensure accurate preload in critical turbine joints.
• 100% Traceability & Marking: Per ASTM F468, all fasteners are permanently stamped with our manufacturer symbol and proper alloy markings, verified by handheld XRF (PMI) prior to dispatch.