Incoloy 800H Alloy Bar for Industrial Heat Exchangers and Corrosive Environment Solutions

1. Product Information‌

‌Product Name‌: Incoloy 800H Bar (Ultra-High Purity Grade)
‌Material Type‌: Nickel-Iron-Chromium Superalloy (Low-Cobalt, Neutron-Resistant)
‌Standards‌: ASTM B408 (Nuclear), RCC-MRx Code, ASME III Division 1, UNS N08810
‌Forms Available‌: Vacuum-arc remelted (VAR) bars, isothermally forged bars.
‌Diameter Range‌: 15 mm to 400 mm (ultra-pure grades up to 600 mm).
‌Surface Finish‌: Electropolished (Ra ≤ 0.2 μm), passivated per ASTM A967.
‌Operating Temperature‌:

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

• Short-term exposure: 1000°C (1832°F) for aerospace components

‌2. Characteristics‌

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

• ‌Neutron Irradiation Stability‌: Low Co content minimizes activation products (Co-60 activity <1 μCi/g after 10⁹ n/cm² fluence).

• ‌Creep-Fatigue Resistance‌: Endures 2×10⁴ cycles at 700°C with 100 MPa stress amplitude (RCC-MRx compliance).

• ‌Ultra-High Vacuum Compatibility‌: Outgassing rate <5×10⁻¹⁰ Torr·L/s/cm² after electropolishing.

• ‌Phase Purity‌: No detrimental phase formation (e.g., sigma, Laves) after 10,000 hours at 700°C in helium-cooled reactors.

• ‌Cryogenic Ductility‌: Retains 30% elongation at -196°C for liquid hydrogen storage systems.

‌3. Technology‌

‌Manufacturing Process‌:

• ‌Double Vacuum Melt (VIM + VAR)‌: Reduces O₂ <15 ppm, N₂ <30 ppm.

• ‌Isothermal Forging‌: At 1050°C (1922°F) under 200 MPa to eliminate residual porosity.

• ‌Heat Treatment‌:

• Homogenization at 1150°C (2100°F) for 8 hours.

• Stabilization aging at 750°C (1382°F) for 20 hours.
  ‌Quality Control‌:

• Neutron radiography for detecting sub-10 μm defects.

• Residual gas analysis (RGA) for UHV compliance.

• Positron annihilation spectroscopy for vacancy cluster analysis.

‌4. Theory‌

The alloy’s radiation and thermal resilience stems from advanced metallurgical design:

• ‌Low-Activation Chemistry‌: Minimized Co, Ta, and Nb content reduces long-lived isotopes (e.g., Co-60 half-life: 5.27 years).

• ‌Radiation Defect Engineering‌: High Ni content (32-35%) promotes Frenkel pair recombination, preserving ductility post-irradiation.

• ‌TiC Nanoprecipitates‌: 5-50 nm TiC particles act as sinks for helium bubbles, mitigating void swelling (<0.1% at 10²⁷ n/m²).

• ‌Chromium Redistribution‌: Cr-enriched oxide layer prevents oxygen ingress in UHV environments (partial pressure <10⁻¹⁰ mbar).

‌5. Application‌

Specialized Incoloy 800H bars are indispensable in extreme environments:

• ‌Nuclear Power‌:

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

• Fuel assembly grids for Generation IV molten salt reactors (MSRs).

• ‌Aerospace‌:

• Rocket engine combustion liners, re-entry vehicle heat shields, and turbopump shafts.

• ‌Semiconductor‌:

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

• ‌Cryogenics‌:

• Support structures for liquid hydrogen storage tanks and superconducting magnet systems.

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

Google is very recognized by us,They give us awards every year