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Home / Products / Welding Neck Flange / Alloy 800 Nickel-Iron-Chromium High-Temperature Resistant Corrosion Resistant Welding Neck Forged Flange
quality Alloy 800 Nickel-Iron-Chromium High-Temperature Resistant Corrosion Resistant Welding Neck Forged Flange factory
quality Alloy 800 Nickel-Iron-Chromium High-Temperature Resistant Corrosion Resistant Welding Neck Forged Flange factory
quality Alloy 800 Nickel-Iron-Chromium High-Temperature Resistant Corrosion Resistant Welding Neck Forged Flange factory
quality Alloy 800 Nickel-Iron-Chromium High-Temperature Resistant Corrosion Resistant Welding Neck Forged Flange factory
quality Alloy 800 Nickel-Iron-Chromium High-Temperature Resistant Corrosion Resistant Welding Neck Forged Flange factory

Alloy 800 Nickel-Iron-Chromium High-Temperature Resistant Corrosion Resistant Welding Neck Forged Flange

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seamless mild steel pipe

seamless steel tube

seamless pipe steel
Product Summary
Alloy 800 forged flanges offer excellent oxidation & carburization resistance with high Ni-Cr content, suitable for high-temperature petrochemical applications. Compliant with ASTM B564/ASME B16.5 standards, featuring controlled Al+Ti for strength and low impurities for weldability.

Product Details

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High-Temperature Resistance Welding Neck Flange

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Corrosion Resistant Forged Flange

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Nickel-Iron-Chromium Alloy 800 Flange
Product Description
Alloy 800 Alloy Steel Forged Flanges & Chrome Moly Steel Flanges
Alloy 800 (Incoloy 800) Overview

Alloy 800 (commonly referred to as Incoloy 800) is not a typical carbon-steel alloy but rather a nickel-iron-chromium high-temperature alloy. When used for forged flanges, the chemical composition remains consistent with other product forms, with tight controls to meet standards such as ASTM B564 for forgings and related material specifications including UNS N08800.

Chemical Composition (UNS N08800)
Element Composition Range
Nickel (Ni) 30.0 – 35.0%
Chromium (Cr) 19.0 – 23.0%
Iron (Fe) Balance (approx. 39 – 46%)
Carbon (C) ≤ 0.10%
Manganese (Mn) ≤ 1.50%
Silicon (Si) ≤ 1.00%
Copper (Cu) ≤ 0.75%
Sulfur (S) ≤ 0.015%
Aluminum (Al) 0.15 – 0.60%
Titanium (Ti) 0.15 – 0.60%
Aluminum + Titanium (Al + Ti) 0.30 – 1.20%
Key Characteristics
  • High Nickel-Chromium Content: Provides excellent oxidation and carburization resistance at high temperatures, making Alloy 800 flanges ideal for heat exchangers, heater tubes, and petrochemical furnaces.
  • Iron as Balance Element: Higher iron content compared to other nickel alloys offers cost-effectiveness while maintaining strong high-temperature performance and corrosion resistance.
  • Controlled Aluminum and Titanium: These additions provide crucial strengthening properties, particularly in related grades like 800H/800HT where carbon, aluminum, and titanium are tightly controlled for enhanced creep strength.
  • Low Impurity Levels: Minimal sulfur and controlled carbon content ensure excellent weldability and resistance to intergranular corrosion.
Specification Standards

When specifying Alloy 800 forged flanges, reference the following standards:

  • Material: Alloy 800 / Incoloy 800, UNS N08800
  • Product Standard: ASTM B564 (Nickel Alloy Forgings)
  • Flange Standard: ASME B16.5 or B16.47
Important Note

For critical applications, always verify the exact chemical composition from the mill test certificate (MTC) and ensure alignment with relevant ASTM/ASME specifications for UNS N08800. Minor variations can significantly impact high-temperature performance.

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