Inconel 625 Flanges: Strength, Reliability, and Performance in Extreme Conditions

In industrial applications where heat, pressure, and corrosion are constant challenges, the choice of material can make or break performance. One such material that stands out for its durability and versatility is Inconel 625—a nickel-based superalloy known for exceptional strength and resistance to harsh environments. When crafted into flanges, Inconel 625 becomes the ideal component for piping systems across demanding industries.

What is Inconel 625?

Inconel 625 is a corrosion- and oxidation-resistant nickel alloy with high strength and outstanding weldability. It is composed mainly of:

Nickel (Ni): 58% minimum

Chromium (Cr): 20-23%

Molybdenum (Mo): 8-10%

Niobium (Nb): 3.15-4.15%

This combination gives the alloy excellent mechanical properties and resistance to a wide range of corrosive environments, including seawater, acidic environments, and high-temperature atmospheres.

Why Choose Inconel 625 Flanges?

 Corrosion Resistance

One of the key benefits of Inconel 625 flanges is their exceptional resistance to pitting, crevice corrosion, and intergranular corrosion. This makes them ideal for marine applications, chemical processing, and offshore platforms.

 High-Temperature Strength

With the ability to retain strength and resist oxidation at temperatures up to 980°C (1800°F), Inconel 625 flanges are perfect for heat exchangers, turbine engines, and exhaust systems.

 Mechanical Durability

The alloy maintains its structural integrity under high stress and pressure, even in cryogenic temperatures. That’s why Inconel 625 flanges are often used in aerospace and power generation systems.

 Versatile Applications

Inconel 625 flanges come in various types:

Weld Neck Flanges

Slip-On Flanges

Blind Flanges

Socket Weld Flanges

Lap Joint Flanges

Each type is tailored to meet specific design requirements and operating conditions.

Common Applications of Inconel 625 Flanges

Oil and Gas Industry: For subsea piping and risers exposed to seawater and extreme pressure.

Aerospace: In exhaust ducts, engine thrust-reverser systems, and combustion systems.

Chemical Processing Plants: For heat exchangers, reactors, and distillation columns.

Nuclear Power: In reactor core components and steam lines.

International quality standards (ASTM B564 / ASME SB564)

Custom sizes and pressure ratings

Quick delivery across Europe, the Middle East, and beyond

Competitive pricing and bulk order support

ANSI B16.5 Inconel 625 Flanges Specification

Dimensions : ANSI B16.5, ANSI B16.47 Series A & B, MSS SP44, ASA, API-605, AWWA, Custom Drawings

Standards : ASTM, ASME Flanges, ANSI Flanges, DIN Flanges, EN Flanges, BS Flanges etc.

Specifications : ASTM B564 / ASME SB 564

Size : 1 / 2” to 36″

Class : 150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc.

Grade : Inconel 625 – UNS N06625

Our Inconel 625 Flanges conforms to NACE MR0175/ISO 15156

ASTM B564 Inconel 625 Flanges Equivalent Grades

STANDARD WERKSTOFF NR. UNS GOST AFNOR JIS BS EN OR

Inconel 625

2.4856

N06625

ХН75МБТЮ

NC22DNB4M

NCF 625

NA 21

NiCr22Mo9Nb

ЭИ602

Inconel 625 Flanges Chemical Properties 

Grade Ni Cr Fe C Mn Si Mo Co Al Ti Nb + Ta P S

Inconel 625

58.0 min

20.0 – 23.0

5.0 max

0.10 max

0.50 max

0.50 max

8.0 – 10.0

1.0 max

0.40 max

0.40 max

3.15 – 4.15

0.015 max

0.015 max

625 Inconel Alloy Pipe Flanges Mechanical Properties

Density Melting Point Tensile Strength Yield Strength (0.2%Offset) Elongation

8.4 g/cm3

1350 °C (2460 °F)

Psi – 135,000 , MPa – 930

Psi – 75,000 , MPa – 517

42.5 %

 Our products undergo rigorous testing to ensure they perform reliably even in the most extreme environments.

Conclusion

If your project demands strength, resistance to corrosion, and performance under pressure, Inconel 625 flanges are the go-to solution. Invest in components that ensure safety, efficiency, and longevity for your systems.

Need a quote or have a custom requirement?

Reach out to us today and our technical team will be happy to assist!