Inconel 601 Sheet – Superior Thermal Stability & Corrosion Resistance for Extreme Environments

Description

Inconel 601 sheet is a nickel-chromium-aluminum alloy engineered to withstand extreme temperatures (up to 1,250°C / 2,282°F) while maintaining structural integrity and resistance to oxidation, carburization, and thermal fatigue. Composed of 58–63% nickel, 21–25% chromium, and 1.0–1.7% aluminum, this alloy forms a dense alumina (Al₂O₃) surface layer under high-heat conditions, providing unparalleled protection against corrosive media such as sulfur, chlorides, and acidic environments. Its low carbon content (≤0.10%) and balanced iron matrix ensure minimal carbide precipitation and intergranular attack, making it ideal for cyclic thermal operations in aerospace, petrochemical, and energy generation systems.

Certified to ASTM B168 and ASME SB-168 standards, Inconel 601 sheet achieves a tensile strength of 550–690 MPa and elongation of ≥30%, outperforming conventional stainless steels in high-stress applications. With a thermal expansion coefficient of 13.0×10⁻⁶/°C and thermal conductivity of 11.7 W/m·K, it minimizes distortion in rapid heating/cooling cycles, ensuring dimensional stability in gas turbine combustors, nuclear reactor components, and industrial furnaces.

Technical Specifications (Table)

Applications

1. Aerospace: Combustion chambers, exhaust liners, and turbine seals requiring oxidation resistance at 1,100°C+.

2. Petrochemical: Sulfur recovery units (SRUs), ethylene cracker tubes, and H₂S-resistant piping systems.

3. Heat Treatment: Radiant tubes, furnace muffles, and annealing baskets in carburizing atmospheres.

4. Nuclear Energy: Reactor coolant components and radiation-resistant structural parts.

5. Energy Generation: Flue gas ducting and boiler baffles in coal-fired power plants.

Q&A

Q1: How does Inconel 601 compare to Inconel 625 in high-temperature performance?
A: Inconel 601 excels in oxidation resistance above 1,000°C due to its aluminum content, while Inconel 625 offers better chloride corrosion resistance at lower temperatures.

Q2: What welding methods are recommended for Inconel 601 sheets?
A: Use TIG or MIG welding with AWS ERNiCr-3 filler metal. Post-weld stress relief at 600–650°C is advised to prevent cracking.

Q3: Can Inconel 601 sheets operate in chlorine-rich environments?
A: While resistant to moderate chlorine exposure, prolonged use above 800°C in high-chlorine atmospheres requires protective coatings or alternative alloys.