Q1: What are Incoloy rods and what makes them corrosion-resisting?
A1: Incoloy rods are nickel-iron-chromium-based alloys designed for high corrosion resistance and excellent high-temperature performance. Variants like 718, 800, 800H, and 800HT provide a combination of strength, oxidation resistance, and durability in harsh chemical, marine, and high-temperature environments.
Q2: What are the main applications of Incoloy rods/bars?
A2: These rods are used in chemical processing, aerospace, power generation, oil and gas, marine, and furnace equipment. Typical applications include turbine shafts, heat exchanger components, high-temperature fasteners, industrial furnace parts, and chemical-resistant machinery.
Q3: How do the different Incoloy grades vary in temperature and strength?
A3:
Incoloy 718: Excellent high-strength at elevated temperatures up to 700 °C; widely used in aerospace and turbine applications.
Incoloy 800: Good high-temperature strength and oxidation resistance up to ~1100 °C.
Incoloy 800H: Higher carbon content than 800, better creep resistance for prolonged high-temperature service.
Incoloy 800HT: Optimized for high-temperature creep strength and stress rupture resistance at temperatures above 1000 °C.
Q4: What are the typical mechanical properties of these Incoloy rods?
A4: Properties vary by grade:
Tensile strength: 485–1200 MPa
Yield strength: 240–1100 MPa
Elongation: 25–50%
Hardness: 95–300 HB
These properties allow the rods to maintain structural integrity under both high-stress and corrosive conditions.
Q5: How can Incoloy rods be fabricated and processed?
A5: Incoloy rods can be machined, forged, and formed into required shapes. They can also be welded using TIG, MIG, or other nickel-alloy-compatible welding techniques. The rods are usually supplied in solution-annealed condition to maximize corrosion resistance and mechanical performance. Post-weld heat treatment may be applied for critical high-temperature applications.
