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

The Incoloy 800H T Bar is a high-temperature, creep-resistant nickel-iron-chromium superalloy designed to withstand extreme conditions in industrial and aerospace applications. It is commonly used in systems that operate under high heat and mechanical stress, such as gas turbines, steam turbines, and hydrogen production facilities. Manufactured according to ASTM B408, ASME SB408, UNS N08811, and EN 10095 standards, the Incoloy 800HT bar is available in hot-forged, extruded, and precision-ground forms, with a diameter range from 15 mm to 400 mm (customizable up to 600 mm for forged applications). The bar features a surface finish that can be pickled, blasted, or electropolished to a smooth Ra ≤ 0.4 μm. This alloy is designed to perform reliably at continuous service temperatures of up to 950°C (1742°F), with short-term exposure up to 1150°C (2102°F). It is ideal for applications in power generation, hydrogen production, waste-to-energy systems, and cryogenic technologies.

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).

Comparison Parameter Table

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.

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%.

Application

Incoloy 800HT bars are critical in next-generation energy systems and high-performance aerospace components:

• 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).

Our Advantage

1. Market Leader
   Top 5 in China's nonferrous metal industry.

2. Flexible Products
   Thousands of product specifications to meet multiple buyer needs.

3. Low MOQ
   Custom samples available for testing.

4. Short Production Lead Time
   Fast delivery of whole cabinet.

5. Professional Inspection Equipment
   Comprehensive product inspection using spectrometers, tensile testers, and more.

6. Professional Business Team
   Quick response to inquiries, 24/7 professional quotations.

7. Intact Packaging
   Custom packaging options like wooden boxes to ensure safe delivery.

8. Various Payment Methods
   Flexible payment options to ease the purchasing process.

9. Good Customer Reviews
   Long-term cooperation with clients, some exceeding 7 years.

10. Award Recognition
    Recognized annually by Google for excellence in the industry.

• ABOUT US
• About DLX ALLOY

• CHANGZHOU DLX ALLOY CO, LTD was established in 2002 and has got ISO9001 International Quality Management System Certificate and SGS Certificate. Our factory is professional in researching and producing special alloy material. From melting, drawing, heat treatment, finishing and testing .We offer nickel based, copper-based, and iron-based alloys, including super alloy, welding materials, anti-corrosion alloy, Precision Alloy , FeCrAl alloy, NiCr alloy, CuNi alloy, thermocouple and etc, in the form of wire, strip, ribbon, bar, tube, plate.

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• About Our factory

• Our 12,000㎡ factory is equipped with complete capabilities for research, production, testing, and packaging. We strictly adhere to ISO 9001 standards in our production processes, with an annual output of 1,200 tons. This ensures that we meet both quantity and quality demands. Furthermore, all products undergo rigorous simulated environment testing including high temperature, high pressure, and corrosion tests before being dispatched, ensuring they meet customer specifications. We also provide chemical analysis reports for every FeCrAl alloy, NiCr alloy, and other products purchased.

• For all our clients, we offer timely and multilingual after-sales support and technical consulting, helping you resolve any issues swiftly and efficiently.

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FAQ

Q1: What is Incoloy 800HT?
A1: Incoloy 800HT is a high-performance nickel-chromium alloy designed for high-temperature and creep-resistant applications, often used in gas turbines and aerospace components.

Q2: What is the temperature range for Incoloy 800HT?
A2: Incoloy 800HT can operate at continuous service temperatures up to 950°C (1742°F) and can tolerate short-term exposure to 1150°C (2102°F).

Q3: Is Incoloy 800HT weldable?
A3: Yes, Incoloy 800HT is compatible with welding processes such as laser and electron beam welding, using AWS A5.14 ERNiCr-3 filler.

Q4: What are the main applications of Incoloy 800HT?
A4: It is used in power generation, hydrogen production, waste-to-energy systems, and cryogenic applications due to its exceptional creep resistance and thermal stability.

Q5: How does Incoloy 800HT compare to other alloys in terms of creep resistance?
A5: Incoloy 800HT offers 30% better creep strength than standard Incoloy 800H, with a 100,000-hour rupture life at 850°C under 20 MPa stress.