Nickel Alloys Inconel 625 Flanges

The Inconel 625 Flange is a critical forging component used to create secure, leak-proof, and removable connections within a piping system. These flanges are used to join pipes, valves, pumps, and other equipment in environments where conventional materials fail due to heat, pressure, or corrosion. Manufactured from the elite nickel-chromium-molybdenum superalloy, UNS N06625 (Alloy 625), the flanges derive their high strength and toughness from the solid solution effects of molybdenum and niobium. The alloy's robust composition ensures the flanges retain their integrity and oxidation resistance at high temperatures. Crucially, Inconel 625 provides outstanding corrosion resistance, including near-immunity to chloride ion stress corrosion cracking (SCC) and superior defense against pitting and crevice corrosion in aggressive media like seawater, acidic and sour gas environments. Zeron Fastners manufactures and supplies these critical flanges in various types (Weld Neck, Slip-On, Blind, Threaded, etc.) in strict compliance with dimensional standards such as ASME B16.5 and the material specification ASTM B564 (for bar and billet used for forging).

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Inconel 625 Flanges

Chemical Composition (UNS N06625 / Alloy 625)

Element Composition (%)
Nickel (Ni) 58.0 Min
Chromium (Cr) 20.0 to 23.0
Molybdenum (Mo) 8.0 to 10.0
Niobium + Tantalum (Nb + Ta) 3.15 to 4.15
Iron (Fe) 5.0 Max
Carbon (C) 0.10 Max
Cobalt (Co) 1.0 Max
Aluminum (Al) 0.40 Max
Titanium (Ti) 0.40 Max
Silicon (Si) 0.50 Max
Manganese (Mn) 0.50 Max
Phosphorus (P) 0.015 Max
Sulfur (S) 0.015 Max

Note: Composition according to specifications like ASTM B564 ASME SB446.

Mechanical Properties (UNS N06625 / Alloy 625)

Property (Annealed) Minimum Value
Ultimate Tensile Strength (MPa) 690
Yield Strength (0.2% Proof) (MPa) 275
Elongation (%) 30 Min
Density (g cm⁻³) 8.44 Typical
Melting Range (°C) 1290 to 1350
Maximum Service Temperature (°C) 982

Values are typical for annealed material and may vary based on specific forging process and size.

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