High Strength Incoloy 800 Alloy Bar for Heat Treatment Furnaces and Power Plant Systems

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1. Product Information‌

‌Product Name‌: Incoloy 800 Bar (Nuclear-Grade)
‌Material Type‌: Nickel-Iron-Chromium Superalloy (Low-Cobalt Variant)
‌Standards‌: ASTM B408 (Nuclear), RCC-MRx Code, UNS N08800, ASME III Division 1.
‌Forms Available‌: Centrifugally cast bars, vacuum-arc remelted (VAR) bars.
‌Diameter Range‌: 10 mm to 250 mm (ultra-pure grades up to 500 mm).
‌Surface Finish‌: Electropolished (Ra ≤ 0.2 μm) or passivated per ASTM A967.
‌Key Composition‌:

• Nickel (Ni): 32-35%

• Chromium (Cr): 20-22%

• Iron (Fe): Balance

• Carbon (C): ≤0.05%

• Cobalt (Co): ≤0.10% (controlled for nuclear compliance)

• Aluminum (Al): 0.25-0.45%

• Titanium (Ti): 0.25-0.45%
  ‌Operating Temperature‌:

• Continuous service: Up to 750°C (1382°F) in neutron flux environments.

• Short-term exposure: Up to 950°C (1742°F) for aerospace components.

‌2. Characteristics‌

This nuclear-optimized Incoloy 800 bar variant delivers exceptional performance in radiation and ultra-high-vacuum (UHV) environments:

• ‌Neutron Irradiation Stability‌: Low Co content (<0.10%) minimizes long-lived isotope activation (e.g., Co-60).

• ‌Creep-Fatigue Resistance‌: Endures 10⁵ cycles at 700°C with 150 MPa stress amplitude (per RCC-MRx design curves).

• ‌Ultra-High Vacuum Compatibility‌: Outgassing rate <1×10⁻⁹ Torr·L/s/cm² after electropolishing, ideal for space applications.

• ‌Corrosion Resistance‌: Withstands borated water (3,000 ppm boron) in PWR nuclear reactors without stress corrosion cracking.

• ‌Dimensional Precision‌: Tight tolerance (±0.05% of nominal diameter) for critical rotating components.

‌3. Technology‌

‌Manufacturing Process‌:

• ‌Vacuum Induction Melting (VIM) + VAR‌: Reduces impurities (O₂ < 20 ppm, N₂ < 50 ppm) and ensures radial homogeneity.

• ‌Isothermal Forging‌: Performed at 1050°C (1922°F) under 150 MPa pressure to eliminate porosity.

• ‌Heat Treatment‌:

• Homogenization at 1150°C (2102°F) for 4 hours.

• Stabilization annealing at 750°C (1382°F) for 16 hours to optimize precipitate distribution.
  ‌Quality Control‌:

• Neutron radiography for detecting sub-surface defects in nuclear applications.

• Residual stress analysis via X-ray diffraction (XRD).

• Helium leak testing (<1×10⁻¹⁰ mbar·L/s) for aerospace UHV components.

‌4. Theory‌

The alloy’s unique properties stem from advanced nuclear-grade engineering:

• ‌Low-Activation Design‌: Minimized Co, Ta, and Nb content reduces residual radioactivity in neutron flux.

• ‌Radiation-Induced Defect Mitigation‌: High Ni content promotes recombination of Frenkel pairs, preserving ductility post-irradiation.

• ‌Boron Compatibility‌: Chromium-rich oxide prevents boron ingress in PWR coolant systems.

• ‌Grain Boundary Pinning‌: Nano-scale TiN precipitates (5-20 nm) stabilize grain boundaries against thermal and irradiation creep.

‌5. Application‌

Specialized Incoloy 800 bars are critical in radiation and precision engineering fields:

• ‌Nuclear Power‌:

• Control rod drive mechanism shafts, reactor vessel internals, and steam generator divider plates.

• Neutron guide tube supports in research reactors.

• ‌Aerospace‌:

• Satellite thruster nozzles, rocket engine turbopump shafts, and re-entry vehicle heat shields.

• ‌Semiconductor‌:

• Wafer handling arms and CVD reactor components requiring UHV conditions.

• ‌Medical‌:

• Proton therapy beamline components and cyclotron target holders.

6. Parameters

Our Advantage

1. Market Leader

Top 5 in China's nonferrous metal industry

2. Flexible products

Thousands of product specifications,Meet multiple needs of buyers

3. Low MOQ

Can customize samples

4. Short production lead time，fast delivery of whole cabinet

5. Professional inspection equipment

Before delivery, we will use spectrometers, tensile testers and other professional equipment to conduct a comprehensive inspection of the products to ensure that the goods are qualified for acceptance

6. Professional business team

Quickly responds to customer inquiries,24-hour professional quotation online

The salesperson will follow the customer's requirements for the use of the product,Professionally recommend more appropriate performance and price products to customers

7. Intact packaging

Packaging according to customer needs.You can customize wooden boxes to ensure that the goods arrive at the destination in good condition

8. Various payment methods

Facilitate customer payment

9. Get good reviews from customers

Old customers have long-term cooperation,The longest is more than 7 years

10. Received various awards

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