High Performance Incoloy 800HT Alloy Bar for Gas Turbine Blades and Aerospace Parts

1. Product Information‌

‌Product Name‌: Incoloy 800HT Bar (High-Temperature Creep-Resistant Grade)
‌Material Type‌: Nickel-Iron-Chromium Superalloy (Austenitic, High-Carbon Variant)
‌Standards‌: ASTM B408, ASME SB408, UNS N08811, EN 10095
‌Forms Available‌: Hot-forged bars, extruded bars, and precision-ground bars.
‌Diameter Range‌: 15 mm to 400 mm (customizable up to 600 mm for forged applications).
‌Surface Finish‌: Pickled, blasted, or electropolished (Ra ≤ 0.4 μm).

‌Operating Temperature‌:

• Continuous service: Up to 950°C (1742°F)

• Short-term exposure: 1150°C (2102°F) for <50 hours

Certifications‌: ASME Section III (Nuclear), TÜV Rheinland PED 2014/68/EU, ISO 15156 for sour service.

‌2. Characteristics‌

Incoloy 800HT bars are engineered for extreme creep resistance and oxidation stability in ultra-high-temperature environments:

• ‌Enhanced Creep Strength‌: 100,000-hour rupture life of 20 MPa at 850°C, 30% superior to standard 800H.

• ‌Oxidation Resistance‌: Dual-layer Al₂O₃-Cr₂O₃ oxide scale formation with oxidation rate <0.08 g/m²·h at 950°C.

• ‌Carburization Resistance‌: Carbon penetration limited to 0.3 mm after 25,000 hours in gas atmospheres (ac₃ <0.25).

• ‌Thermal Fatigue Resistance‌: Thermal expansion coefficient of 14.2 μm/m·°C (20–800°C) minimizes cyclic stress.

• ‌Phase Stability‌: No sigma-phase formation after 20,000 hours at 900°C, maintaining 20% elongation.

• ‌Weldability‌: Compatible with laser and electron beam welding (AWS A5.14 ERNiCr-3 filler).

‌3. Technology‌

‌Manufacturing Process‌:

• ‌Triple Melt Technology (VIM + ESR + VAR)‌: Reduces impurities (S < 0.002%, O₂ < 15 ppm).

• ‌Isothermal Forging‌: At 1100–1200°C under 250 MPa to achieve ASTM grain size 2-4.

• ‌Heat Treatment‌:

• Solution annealing at 1200°C (2192°F) with helium quenching.

• Stabilization annealing at 900°C (1652°F) for 5 hours to homogenize M₂₃C₆ carbides.
  ‌Quality Control‌:

• Ultrasonic testing (UT) per ASTM A388 for defects >0.5 mm.

• Creep rupture testing per ASTM E139 (1000-hour tests at 850°C).

• Electron channeling contrast imaging (ECCI) for dislocation density analysis.

‌4. Theory‌

The alloy’s performance is anchored in advanced metallurgical principles:

• ‌Carbon-Titanium Synergy‌: Controlled C and Ti levels promote intragranular (Ti,Mo)C carbides that inhibit dislocation climb at >800°C.

• ‌Aluminum Redistribution‌: Al diffuses to grain boundaries, enhancing oxide layer adhesion under thermal cycling.

• ‌Nickel Matrix Dominance‌: High Ni content prevents σ-phase formation while maintaining austenitic ductility.

• ‌Dynamic Recovery‌: Hot working induces polygonization of dislocations, increasing creep ductility by 25%.

‌5. Application‌

Incoloy 800HT bars are critical in next-generation energy systems:

• ‌Power Generation‌:

• Ultra-supercritical (USC) boiler tube hangers (steam conditions: 620°C/300 bar).

• Gas turbine combustor transition ducts operating at 900°C.

• ‌Hydrogen Production‌:

• Steam methane reformer (SMR) outlet headers in blue hydrogen plants.

• High-temperature electrolyzer (SOEC) interconnects for green hydrogen.

• ‌Waste-to-Energy‌:

• Grate bars in municipal waste incinerators (850°C, HCl-rich flue gas).

• ‌Cryogenic Systems‌:

• Support struts for liquid natural gas (LNG) storage tanks (-162°C to 200°C thermal cycling).

  
  

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