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Inconel 800 Sheet & Plate

Inconel 800 Sheet & Plate (UNS N08800,1.4876)

Inconel 800 Sheet & Plate (UNS N08800, 1.4876) is a nickel-iron-chromium alloy known for its exceptional strength, thermal stability, and corrosion resistance in high-temperature environments. Designed for use in demanding industrial applications, it resists oxidation, carburization, and nitridation while maintaining its structural integrity under prolonged exposure to elevated temperatures. With its excellent mechanical properties and ability to withstand thermal fatigue, Inconel 800 is widely used in petrochemical, power generation, and heat treatment industries.

 

Key Properties Inconel 800 Sheet & Plate

  • High-Temperature Strength: Maintains mechanical strength and creep resistance at temperatures up to 1100°C (2000°F).
  • Corrosion Resistance: Superior resistance to oxidation and carburization in extreme thermal and chemical environments.
  • Thermal Stability: Excellent resistance to thermal fatigue and stress rupture in cyclic thermal applications.
  • Good Fabrication: High ductility and weldability make it suitable for forming and joining with conventional techniques.
  • Durability: Long-lasting performance in harsh operating conditions, reducing maintenance and downtime.

 

Technical Specifications

  • UNS: N08800
  • DIN: 1.4876

Available Thickness

3/16″1/4″3/8″1/2″5/8″3/4″
4.8mm6.3mm9.5mm12.7mm15.9mm19mm
1″1 1/4″1 1/2″1 3/4″2″
25.4mm31.8mm38.1mm44.5mm50.8mm
inconel-800-800ht

Application

  • Automotive
  • Chemical and Pharmaceutical
  • Fertilizer
  • Food Processing and Handling
  • Manufacturing
  • Mining
  • Oil & Gas
  • Phosphate Mining

Standard

  • ASTM A240 / A240M
  • ASTM A276 / A276M
  • ASTM A312 / A312M
  • ISO 15510
  • EN 10088-2
  • IN 10204
  • HE G4304
  • HE G4305
  • ASME SA240 / SA240M

Equivalent Grade for Nickel 800H/800HT

CountryStandardGrade
USAASTMAlloy 800H/800HT
EuropeEN1.4876
GermanyDINNiCr 8020
JapanJISNCF 800H
ChinaGBGH3044
IndiaISIS 6603
FranceAFNORZ3CN20-09
ItalyUNI2.4858
South KoreaKSH800

Corrosion Resistance

  • Oxidation Resistance: Nickel 800H is highly resistant to oxidation at high temperatures. It forms a protective oxide layer on its surface, which helps prevent further degradation.
  • Carburization Resistance: It maintains its structural integrity in environments where carburization is a concern, making it suitable for use in applications with high carbon potential.
  • Sulfur Resistance: The alloy performs well in sulfur-containing environments, which is beneficial in some chemical processing applications.
  • Acid Resistance: While not as resistant to acids as some other nickel alloys (like those with higher nickel content), 800H performs reasonably well in certain acid environments, though it’s not recommended for strong acids or reducing acids.

Inconel 800 Chemical Composition

ElementTypical Content (%)
Nickel (Ni)30.0 – 35.0
Chromium (Cr)19.0 – 23.0
Iron (Fe)Balance (up to 36.0)
Carbon (C)0.05 – 0.10
Manganese (Mn)1.0 max
Silicon (Si)1.0 max
Sulfur (S)0.015 max
Phosphorus (P)0.015 max
Copper (Cu)0.75 max

Inconel 800 Physical Properties

PropertyValue
Density8.08 g/cm³ (0.292 lb/in³)
Melting Point~1,400°C (2,552°F)
Thermal Conductivity~11.4 W/m·K (7.9 Btu·in/hr·ft²·°F)
Thermal Expansion~13.0 x 10⁻⁶ /°C (7.2 x 10⁻⁶ /°F)
Specific Heat Capacity~0.44 J/g·K (0.105 Btu/lb·°F)

Inconel 800 Mechanical Properties

PropertyValue
Yield Strength~205 MPa (30 ksi)
Tensile Strength~310 MPa (45 ksi)
Elongation~30%
Reduction of Area~50%
Hardness~95 HRB (Rockwell B)
Modulus of Elasticity~200 GPa (29,000 ksi)
Poisson’s Ratio~0.31
Fatigue Strength~160 MPa (23 ksi) at 10^7 cycles

Fabrication Data

  • Welding:

    • Weldability: Both alloys have good weldability using common welding methods like GTAW (TIG), GMAW (MIG), and SMAW (stick welding).
    • Filler Materials: Recommended filler metals are Inconel 82 (ERNiCr-3) or Inconel 617 (ERNiCrCoMo-1). These filler materials help maintain the alloy’s properties.
    • Preheat/Post-weld Heat Treatment: Typically, preheating is not required. However, post-weld heat treatment may be applied to relieve stress and enhance corrosion resistance.

  • Forming:

    • Hot Forming:
      • Alloy 800/800HT can be hot-formed at temperatures between 870°C to 1230°C (1600°F to 2250°F).
      • Rapid cooling after hot forming is recommended to avoid grain growth, which can degrade mechanical properties.
    • Cold Forming:
      • These alloys can be cold-formed using standard methods.
      • Work hardening may occur, so intermediate annealing might be necessary during extensive forming operations.

  • Machining:

    • Machinability: Nickel Alloy 800/800HT can be machined using conventional techniques, but it is considered to have moderate machinability due to its high strength.
    • Cutting Fluids: Use of cutting fluids is recommended to reduce heat buildup during machining.
    • Tooling: Carbide-tipped tools are preferred due to the hardness of the alloy.

  • Heat Treatment:

    • Solution Annealing: The alloy should be solution annealed at 982°C to 1038°C (1800°F to 1900°F) followed by rapid air cooling or water quenching.
    • Stabilization Annealing (for 800HT): For Alloy 800HT, stabilization annealing at around 870°C (1600°F) is often done to improve stress rupture life.

  • Corrosion Resistance:

    • Both alloys are highly resistant to oxidation and carburization at elevated temperatures.
    • They also show good resistance to chloride stress-corrosion cracking.

  • Applications:

    • Alloy 800: Typically used in applications where resistance to oxidation and carburization at elevated temperatures is required.
    • Alloy 800HT: Similar applications as Alloy 800, but 800HT is preferred when improved creep and stress rupture properties are needed.
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