Incoloy 800H (UNS N08810) Nickel Alloy for High Temperature Corrosion Resistance

What Is Incoloy 800H and Why Is It Used in High-Temperature Industries?

Incoloy 800H is a high-temperature nickel-iron-chromium alloy designed for excellent strength, oxidation resistance, and carburization resistance in extreme thermal environments.

Compared with standard Alloy 800, Incoloy 800H features:

• Controlled carbon content (0.05–0.10%)
• Coarse grain structure
• Improved creep rupture strength
• Better long-term thermal stability

The alloy performs exceptionally well in environments ranging from:

• 1100°F to 1800°F
• High-temperature oxidation atmospheres
• Carburizing environments
• Nitriding conditions
• Petrochemical furnace systems

Because of its superior metallurgical stability, Incoloy 800H is widely used in:

• Ethylene cracking furnaces
• Heat exchangers
• Reformer tubes
• Hydrocarbon processing systems
• Chemical processing equipment
• High-temperature Piping Systems

• What Is UNS N08810 and How Does It Relate to Incoloy 800H?
• UNS N08810 is the official UNS designation for Incoloy 800H.
• The UNS system standardizes alloy grades internationally, helping engineers, EPC contractors, and procurement teams identify compatible materials across ASTM, ASME, DIN, EN, and ISO standards.
• UNS N08810 Equivalent Standards

• Standard System	Equivalent Grade
  UNS	N08810
  Werkstoff	1.4958
  ASTM	Alloy 800H
  ASME	SB-409 / SB-407
  EN	EN 10095
  DIN	DIN 17460

• This grade is commonly specified for:
• High-temperature pressure vessels
• Furnace components
• Petrochemical processing equipment
• Heat-resistant piping systems

• What Certifications and ASTM Standards Apply to Incoloy 800H (UNS N08810)?
• One of the biggest purchasing concerns for industrial buyers is compliance certification.
• Incoloy 800H is produced under multiple international standards depending on product form.
• Pipe Standards
• ASTM B407
• ASTM B829
• ASME SB407
• ASME SB829
• Used for:
• Seamless high-temperature pipes
• Furnace piping
• Process piping systems

• Tube Standards
• ASTM B163
• ASTM B515
• ASTM B751
• ASME SB163
• ASME SB515
• Common applications include:
• Heat exchanger tubes
• Condenser tubes
• Boiler systems

• Plate & Sheet Standards
• ASTM B409
• ASTM B906
• ASME SB409
• EN 10028-7
• Widely used in:
• Pressure vessels
• Furnace linings
• Thermal processing equipment

• Additional Industry Certifications
• NACE MR0175
• ASME Code Case 1325
• ISO 9723 / 9724 / 9725
• DIN 17459 / 17460
• These certifications are critical for:
• Oil & gas projects
• Refinery systems
• Offshore engineering
• Corrosion-sensitive environments

• What Are the Key Mechanical and Corrosion Resistance Properties of Incoloy 800H?
• The main advantage of Incoloy 800H is its balance between:
• High-temperature strength
• Corrosion resistance
• Structural stability

Key Performance Characteristics

• Property	Performance
  Oxidation Resistance	Excellent
  Carburization Resistance	Excellent
  Nitridation Resistance	Excellent
  Creep Strength	High
  Thermal Stability	Excellent
  Weldability	Good
  Cold Formability	Good

• Unlike many stainless steels, Incoloy 800H maintains toughness after prolonged exposure to elevated temperatures.
• This makes it highly suitable for:
• Long-term thermal cycling
• Continuous furnace operation
• High-pressure heat environments

• Incoloy 800H vs 800HT — What Is the Difference?
• This is one of the most common engineering search queries.

• Feature	Incoloy 800H	Incoloy 800HT
  UNS Number	N08810	N08811
  Carbon Content	Controlled	Controlled
  Ti + Al Content	Standard	Higher
  Creep Strength	High	Higher
  High Temp Stability	Excellent	Superior
  Recommended Temperature	High temp service	Extended extreme temp service

• When to Choose 800HT Instead of 800H
• 800HT is typically preferred when:
• Service temperature exceeds 1400°F
• Long-term creep resistance is required
• Thermal exposure is continuous
• Severe carburization exists

• Incoloy 800H vs Stainless Steel 310 — Which Material Is Better for Furnace Applications?
• Many buyers compare Incoloy 800H with 310 Stainless Steel for high-temperature projects.

Comparison Table

• Property	Incoloy 800H	SS 310
  Nickel Content	Higher	Lower
  Creep Strength	Better	Moderate
  Carburization Resistance	Better	Moderate
  Thermal Stability	Superior	Lower
  High Temp Service Life	Longer	Shorter
  Cost	Higher	Lower

• Best Choice by Application

• Choose Incoloy 800H for:

  Ethylene cracking furnaces

  Petrochemical heaters

  Reformer systems

  High-pressure heat exchangers

  Choose SS310 for:

  Moderate-temperature industrial furnaces

  Lower-cost heat-resistant applications

  Intermittent thermal exposure

• Which Products Are Available in Incoloy 800H for Industrial Procurement?
• Industrial buyers typically search by product form rather than alloy grade alone.
• Recommended Products by Application
• Furnace & Petrochemical Systems
• Recommended products:
• Seamless Pipe
• Furnace Tube
• Heat Exchanger Tube
• Popular searches:
• Incoloy 800H seamless pipe
• UNS N08810 heat exchanger tube
• ASTM B407 pipe supplier

• Pressure Vessel Manufacturing
• Recommended products:
• Plate
• Sheet
• Strip
• Typical applications:
• Pressure vessels
• Thermal reactors
• Industrial heaters

• Chemical Processing Equipment
• Recommended products:
• Forgings
• Flanges
• Fittings
• Rods & Bars
• Used in:
• Corrosive fluid systems
• Valve manufacturing
• High-temperature process equipment

• Why Is Incoloy 800H Widely Used in Ethylene Cracking and Hydrocarbon Processing?
• The alloy is specifically engineered for environments involving:
• Carbon-rich atmospheres
• Extreme thermal cycling
• Oxidizing combustion gases
• Long-duration heat exposure
• Typical industries include:

• Industry	Typical Use
  Petrochemical	Cracking furnaces
  Oil & Gas	High-temp piping
  Chemical Processing	Corrosion-resistant reactors
  Heat Treatment	Furnace fixtures
  Power Generation	Superheater systems

• Its ability to resist:
• carburization,
• oxidation,
• nitridation,
• creep rupture,
• makes it one of the most reliable nickel alloys for high-temperature industrial systems.

• How to Choose the Right Incoloy 800H Product for Your Application?
• Selection usually depends on four factors:
• 1. Operating Temperature
• Below 1100°F → Stainless steel may suffice
• Above 1100°F → Incoloy 800H becomes preferable

• 2. Corrosive Environment
• Choose 800H when exposed to:
• carburization
• nitriding
• oxidation
• hydrocarbon cracking

• 3. Mechanical Stress
• For long-term creep resistance under pressure and heat, Incoloy 800H performs significantly better than standard stainless steels.

• 4. Product Form Requirement

• Application	Recommended Product
  Furnace piping	Seamless pipe
  Heat exchanger	Tube
  Pressure vessel	Plate
  Structural support	Bar
  Corrosive process systems	Forgings & fittings

• Where to Buy Incoloy 800H (UNS N08810) Products?

      Hunan Tubular Steel Industry Co., Ltd.

For high-temperature nickel alloy solutions including Incoloy 800H (UNS N08810) pipes, tubes, plates, fittings, and custom industrial materials, connect with Hunan Tubular Steel Industry Co., Ltd. As the global export window of Sanhe Heavy Industry Co., Ltd. since 2012, we specialize in delivering reliable high-performance alloy products and tailored industrial solutions for petrochemical processing, heat treatment systems, energy projects, furnace engineering, offshore applications, and heavy industry worldwide.

Strategically located in Jiangyin City, Jiangsu Province — one of China’s leading heavy manufacturing and steel processing hubs near the Yangtze River — we provide efficient production coordination, strict quality control, and dependable global delivery capabilities for high-temperature alloy materials and industrial piping systems.

Contact Us Today for Technical Consultation, Material Selection Support, Project Cooperation, or Product Inquiries:

Website: www.tubularpiles.com

E-mail: admin@tubularpiles.com

Cell & WhatsApp: +86 13875883111

Direct Number: +0086 731 88649455