Q1: What is Incoloy 800H round bar and what is its UNS number?
A1: Incoloy 800H is a nickel‑iron‑chromium nickel‑base alloy with controlled carbon content and grain size. Its UNS designation is UNS N08810. It is supplied as round bar for high‑temperature applications.
Q2: What is the main difference between Incoloy 800H and standard Incoloy 800?
A2: Incoloy 800H has a higher minimum carbon content (0.05–0.10%) and controlled coarse grain structure, which greatly improves creep‑rupture strength and long‑term stability at elevated temperatures compared to Incoloy 800.
Q3: What heat treatment is applied to Incoloy 800H round bar?
A3: Incoloy 800H round bar is typically supplied in solution annealed condition at approximately 1140~1170°C followed by rapid cooling to develop the required grain structure and mechanical properties.
Q4: What are the main applications of Incoloy 800H round bar?
A4: It is widely used for manufacturing high‑temperature components such as furnace fixtures, heat treatment trays, boiler parts, petrochemical reforming tubes, gas turbine parts, and high‑temperature fasteners.
Q5: What standards apply to Incoloy 800H round bar?
A5: Common standards include ASTM B409, ASME SB409, DIN 17750, and EN specifications. These cover chemical composition, mechanical properties, tensile strength, hardness, and ultrasonic testing requirements.
