Incoloy 800HT / UNS N08811 / 1.4959 / X8NiCrAlTi32-21

Incoloy 800HT / 1.4959 / ХН32Т Alloy: Properties, Applications, and Features

✅ General Technical Characteristics

The Incoloy 800HT (1.4959, ХН32Т) alloy is a high-temperature nickel-iron-chromium alloy that offers excellent resistance to oxidation, carbide aging, and corrosion under prolonged exposure to high temperatures. Due to its balanced chemical composition and thermal processing, this alloy demonstrates outstanding strength and structural stability at temperatures up to 1150°C.

Main Characteristics:

• High thermal resistance and mechanical strength.
• Excellent oxidation and corrosion resistance in aggressive environments.
• Structural stability under prolonged heating.
• Good ductility and weldability.
• High creep strength.

🔬 Chemical Composition of Incoloy 800HT / 1.4959 (%):

• Nickel (Ni): 30.0 – 35.0
• Chromium (Cr): 19.0 – 23.0
• Iron (Fe): Balance
• Aluminum (Al): 0.25 – 0.60
• Titanium (Ti): 0.25 – 0.60
• Carbon (C): 0.05 – 0.10
• Manganese (Mn): ≤ 1.5
• Silicon (Si): ≤ 1.0
• Phosphorus (P): ≤ 0.030
• Sulfur (S): ≤ 0.015

💡 The combination of nickel, chromium, and the addition of aluminum and titanium makes the alloy highly resistant to high temperatures and oxidative corrosion.

🏭 Applications

The Incoloy 800HT (1.4959, ХН32Т) alloy is in demand in industries that require heat resistance, oxidation resistance, and mechanical strength at high temperatures.

Main Application Areas:

• Energy industry (heat exchangers, boilers, gas turbine installations).
• Petrochemical and chemical industries (reactors, furnaces, heat exchangers).
• Aerospace industry (engine components, exhaust systems).
• Industrial equipment manufacturing (thermal equipment, furnaces, pipelines).
• Metallurgy (furnace elements, heat treatment installations).

📊 Mechanical Properties

• Tensile Strength (Rm): ≥ 600 MPa
• Yield Strength (Rp0.2): ≥ 275 MPa
• Elongation (A5): ≥ 30 %
• Hardness (HB): ≤ 220 HB
• Operating Temperature: up to 1150°C

⭐ Features

• High heat resistance – maintains mechanical strength under extreme temperatures.
• Corrosion resistance – withstands exposure to aggressive chemical substances.
• Thermal stability – does not deform under prolonged heating.
• Excellent weldability – easily joins using arc and gas welding methods.
• Wide range of applications – used in critically important industrial sectors.

Incoloy 800HT Delivery Forms