Incoloy Bars: The Best Choice for High-Temperature & Oxidizing Environments (2025 Expert Guide)

Incoloy is a nickel–iron–chromium alloy family designed to survive very high temperatures (800–1100°C), oxidizing atmospheres, sulfidation, high pressure and severe corrosion.

Main alloying elements:

• Nickel (Ni)
• Iron (Fe)
• Chromium (Cr)
• Titanium & Aluminum (in 800H/HT)
• Molybdenum (in 825)

Image Group — Incoloy Alloy Families

• Incoloy 800 – General high-temperature service.
• Incoloy 800H – Higher strength due to controlled carbon.
• Incoloy 800HT – Outstanding high-temperature creep resistance.
• Incoloy 825 – Designed for acidic, chloride and seawater environments.

High Temperature Resistance (Up to 1100°C)

Temperature limits:

• Incoloy 800 → 900°C
• Incoloy 800H → 1000°C
• Incoloy 800HT → 1100°C
• Incoloy 825 → 540°C (acid service)

Perfect for heaters, furnaces, reformer tubes and heat-treatment equipment.

Oxidation & Sulfidation Resistance

Incoloy withstands oxidizing gases, sulfur-bearing environments, carbon buildup and scaling.

Image Group — High Temperature Incoloy Usage

Excellent Corrosion Resistance

Incoloy is resistant to acids (H₂SO₄, HNO₃, HF), seawater, chlorides and caustics. Incoloy 825 is especially known for strong resistance to pitting, stress corrosion cracking and intergranular attack.

High Mechanical Strength Under Stress

Incoloy bars resist creep, fatigue, thermal shock and deformation even under continuous high-temperature pressure cycles.

• Petrochemical plants – heaters, cracker tubes, reformers
• Chemical processing – reactors, acid injection lines
• Oil & gas – sour gas lines, downhole tools
• Marine – offshore valves, shafts, seawater-resistant parts
• Heat treatment – furnace hardware, retorts, baskets

Image Group — Industrial Applications of Incoloy

• Incoloy: Best for high temperature + oxidizing conditions
• Inconel: Best for high temperature + extreme corrosion
• Stainless Steel: General-purpose, lower temp capability

• Complex alloy chemistry
• High nickel and chromium content
• Specialized heat treatment
• Difficult machining
• Long service life in extreme conditions

In critical environments, Incoloy prevents expensive failures and downtime.

Incoloy bars offer unmatched stability at high temperatures and in oxidizing environments. Industries that require long-term reliability, heat resistance and corrosion protection trust Incoloy more than any other nickel alloy.

Whether for petrochemical heaters, reactors, marine components or high-temperature furnaces, Incoloy bars deliver outstanding performance and durability.