High Strength Incoloy 800H High Temperature Alloy Strip for Aerospace and Turbine Components

1. Product Information‌

• ‌Alloy Designation‌: Incoloy 800H (UNS N08810 / W.Nr. 1.4958)

• ‌Certifications‌:
  ASME SB409, EN 10095, NACE MR0103 (ISO 21457) for sour service

• ‌Chemical Composition‌ (wt%):
  Ni 30-34%, Cr 19-23%, Fe ≥39.5%, C 0.05-0.10%, Al 0.15-0.60%, Ti 0.15-0.60%, Mn ≤1.5%, Si ≤1.0%

• ‌Dimensional Tolerances‌:
  Thickness: 0.5–25 mm (±0.5% or ±0.02 mm, whichever is stricter)
  Width: 50–2,500 mm (edge straightness ≤0.1 mm/m)

• ‌Supply Conditions‌:
  Solution-annealed (1,100–1,150°C, water quench), pickled, or cold-rolled (30–50% reduction)

‌2. Key Characteristics‌

• ‌Extreme Temperature Stability‌:

• Continuous service up to ‌815°C‌ with oxidation resistance (mass loss <2 mg/cm² after 1,000 hours at 900°C per ASTM G54).

• Creep rupture strength: ‌120 MPa‌ at 700°C/10,000 hours (per ASTM E139).

• ‌Phase Stability‌:

• No detrimental σ-phase formation below ‌850°C‌ (verified by Thermo-Calc simulations).

• ‌Corrosion Resistance‌:

• Sulfidation resistance in H₂S-containing environments up to ‌550°C‌ (corrosion rate <0.1 mm/year per NACE TM0177).

• Resistance to carburization in hydrocarbon processing (carbon penetration <0.5 mm after 5 years at 650°C).

• ‌Mechanical Properties‌:

• Room temperature: Tensile strength ≥550 MPa, yield strength ≥210 MPa, elongation ≥35%.

• Elevated temperature (700°C): 0.2% proof strength ≥85 MPa.

‌3. Manufacturing Technology‌

• ‌Melt Process‌:
  Triple vacuum refinement (VIM + ESR + VAR) achieves ultra-low impurities:

• Oxygen ≤30 ppm, sulfur ≤0.003%, phosphorus ≤0.015%.

• ‌Thermomechanical Processing‌:

• Controlled warm rolling at ‌650–750°C‌ with inter-pass recrystallization annealing.

• Online laser ultrasonics for real-time grain size monitoring (ASTM 5-7).

• ‌Surface Engineering‌:

• Electrochemical grinding (ECG) generates compressive residual stress (−400 MPa) on strip edges.

• Aluminide diffusion coating option (thickness 20–50 µm) for enhanced oxidation resistance.

‌4. Material Science Principles‌

• ‌High-Temperature Strengthening‌:

• ‌Carbon Control‌: Optimal C content (0.05–0.10%) promotes M₂₃C₆ carbide precipitation at grain boundaries, enhancing creep resistance without compromising ductility.

• ‌Solid Solution Strengthening‌: Ni-Cr matrix with Ti/Al additions stabilizes FCC structure against phase transformation.

• ‌Oxidation Mechanism‌:
  Dual-layer oxide formation:

• Outer layer: Cr₂O₃ (chromia) for oxygen barrier.

• Inner layer: Al₂O₃ (alumina) preventing subsurface oxidation.

• ‌Thermal Fatigue Resistance‌:
  Low coefficient of thermal expansion (CTE: 14.5 µm/m·°C, 20–600°C) minimizes thermal stress during cycling.

‌5. Critical Applications‌

• ‌Power Generation‌:

• Combustion liners for gas turbines (operating at 750–800°C/15 bar).

• Superheater tubes in advanced ultra-supercritical (A-USC) boilers (620°C/31 MPa steam).

• ‌Petrochemical Processing‌:

• Ethylene cracking furnace tubes (pyrolysis service at 850–950°C).

• Hydrocracker reactor internals (resisting H₂ + H₂S at 450°C/20 MPa).

• ‌Nuclear Systems‌:

• Generation IV reactor heat exchangers (helium-cooled, 750°C design).

• Spent fuel dry storage canisters (1,000-year integrity assurance).

• ‌Industrial Heating‌:

• Roller hearth furnace conveyors (1,000°C cyclic loading).

  Sintering trays for powder metallurgy (thermal shock resistance >500 cycles).

• ‌Emerging Technologies‌:

• Concentrated solar power (CSP) receiver panels (900°C solar flux).

• Hydrogen production via high-temperature electrolysis (850°C steam).

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