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Inconel 625 Flanges

Inconel 625 Flanges are manufactured from a nickel-chromium-molybdenum alloy that provides excellent corrosion resistance, high strength, and dependable performance in severe operating conditions. They maintain their integrity under high pressure and elevated temperatures, as well as in seawater, acidic, and chloride-rich environments.
With superior resistance to pitting, crevice corrosion, oxidation, and stress corrosion cracking, Inconel 625 Flanges are widely used in chemical processing, oil and gas, marine engineering, aerospace, and power generation systems. Their robust construction and long service life make them an ideal choice for connecting critical piping and equipment.

 

 

 

 

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Product Overview

Inconel 625 Flanges for High-Performance Applications

Explore detailed information for this alloy product, including specifications, applications, supply options and quotation requirements.

Why buyers choose Inconel 625 Flanges

Inconel 625 Flanges are manufactured from a nickel-chromium-molybdenum alloy that provides excellent corrosion resistance, high strength, and dependable performance in severe operating conditions. They maintain their integrity under high pressure and elevated temperatures, as well as in seawater, acidic, and chloride-rich environments.
With superior resistance to pitting, crevice corrosion, oxidation, and stress corrosion cracking, Inconel 625 Flanges are widely used in chemical processing, oil and gas, marine engineering, aerospace, and power generation systems. Their robust construction and long service life make them an ideal choice for connecting critical piping and equipment.

 

 

 

 

Inconel 625 Flanges
Pipe Specifications

Inconel 625 Flanges size range and supply information

Specifications, available sizes and delivery conditions can vary by production route and order requirements. Contact us for current availability.

Item Typical Options Buyer Notes Typical Specification
Material Grade Inconel 625 / UNS N06625 / W.Nr. 2.4856 Confirm the alloy designation, chemical composition and certification requirements. Nickel-chromium-molybdenum-niobium alloy for severe service
Flange Type Weld neck, slip-on, blind, socket weld, threaded, lap joint or orifice flange Select the flange type according to piping design, welding method and maintenance needs. ASME B16.5 or custom flange configurations
Nominal Size NPS 1/2 to NPS 24, DN15 to DN600 or custom dimensions Provide nominal size, bore diameter and mating pipe dimensions. Standard and custom sizes available
Pressure Class Class 150, 300, 600, 900, 1500 or 2500 Confirm pressure class, temperature rating and applicable piping code. Pressure-rated flanges for high-temperature and corrosive service
Facing Type Raised face, flat face, ring-type joint or male-and-female face Match the facing type with the gasket, bolt set and connecting flange. RF, FF and RTJ facing options
Applicable Standard ASTM B564, ASME SB564, ASME B16.5, ASME B16.47 or project specification Confirm material, dimensional and pressure-rating standards before ordering. ASTM / ASME compliant flange production
Manufacturing Method Forged, machined, hot formed or custom manufactured Forged construction is commonly selected for pressure-critical applications. Precision-machined forged flanges with controlled dimensions
Inspection & Certification MTC, PMI, dimensional inspection, hardness test, UT, radiographic testing and third-party inspection Confirm NDE scope, documentation and traceability requirements before quotation. EN 10204 3.1 certificate and inspection dossier available

 

 

 

 

Standards

Common standards for Inconel 625 Flanges

The final standard should follow the purchase order, engineering specification or project drawing.

Product Type Common Standards Typical Use Inspection Notes
Inconel 625 Weld Neck Flanges ASTM B564 / ASME SB564, ASME B16.5, ASME B16.47 High-pressure piping, offshore systems, chemical processing and high-temperature service Verify flange dimensions, pressure class, bore, weld bevel, PMI, NDT and material traceability.
Inconel 625 Slip-On Flanges ASTM B564 / ASME SB564, ASME B16.5 General-purpose corrosion-resistant piping and fabricated process systems Inspect outside diameter, bolt-hole alignment, facing, bore dimensions and surface condition.
Inconel 625 Blind Flanges ASTM B564 / ASME SB564, ASME B16.5, ASME B16.47 Closing pipe ends, pressure testing and isolating equipment or pipeline sections Check thickness, flatness, pressure rating, bolt-hole pattern, PMI and ultrasonic examination.
Inconel 625 Socket Weld Flanges ASTM B564 / ASME SB564, ASME B16.5 Small-bore high-pressure piping, instrumentation and chemical service connections Verify socket dimensions, bore, pressure class, facing, PMI and dimensional tolerances.
Inconel 625 Threaded Flanges ASTM B564 / ASME SB564, ASME B16.5 Low-to-medium diameter piping where welding is impractical or undesirable Inspect thread accuracy, thread engagement, flange facing, dimensions and material certificates.
Inconel 625 Lap Joint Flanges ASTM B564 / ASME SB564, ASME B16.5 Systems requiring frequent dismantling, alignment adjustment or corrosion-resistant contact surfaces Check stub-end fit, bore alignment, facing, bolt-hole dimensions, PMI and surface quality.
Custom Inconel 625 Flanges ASTM B564 / ASME SB564, ASME B16.47, customer drawings Specialized subsea, aerospace, nuclear and severe-service piping applications Review drawings, machining tolerances, pressure testing, NDT, PMI and inspection certificates.

 

 

 

 

Chemical Composition

Inconel 625 Flanges composition reference

Chemical composition is reported by heat on the material test certificate. Use the table below as a material-selection reference.

Element Symbol Typical Requirement Function
Nickel Ni 58.0 min Provides corrosion resistance, toughness, and high-temperature stability.
Chromium Cr 20.0-23.0 Improves oxidation resistance and protection in oxidizing environments.
Molybdenum Mo 8.0-10.0 Enhances resistance to pitting, crevice corrosion, and reducing acids.
Niobium + Tantalum Nb + Ta 3.15-4.15 Provides solid-solution strengthening and supports flange integrity.
Iron Fe 5.0 max Controlled balancing element in the nickel-based alloy.
Cobalt Co 1.0 max Controlled to maintain consistent mechanical and corrosion properties.
Carbon C 0.10 max Limited to support weldability, machinability, and corrosion resistance.
Manganese Mn 0.50 max Acts as a deoxidizer during alloy production.
Silicon Si 0.50 max Controlled to maintain fabrication quality and surface condition.
Aluminum Al 0.40 max Supports oxidation resistance and alloy stability.
Titanium Ti 0.40 max Contributes to alloy stabilization and mechanical strength.
Phosphorus P 0.015 max Controlled impurity to preserve ductility and flange reliability.
Sulfur S 0.015 max Controlled impurity to reduce brittleness and cracking risk.

 

 

 

 

Mechanical Properties

Mechanical Properties of Inconel 625 Flanges

Mechanical properties vary by standard, pipe size, production route and heat treatment. Use the specified standard and MTC as the final acceptance basis.

Condition / Product Tensile Strength Yield Strength 0.2% Elongation Notes
Forged Inconel 625 flanges 827 MPa min reference 414 MPa min reference 30% min reference Common reference condition for pressure, heat, and corrosion-resistant service.
Annealed Inconel 625 flanges By ASTM / ASME specification By ASTM / ASME specification By ASTM / ASME specification Provides a balance of strength, ductility, and corrosion resistance.
Weld-neck Inconel 625 flanges By applicable ASTM / ASME specification By applicable ASTM / ASME specification By applicable ASTM / ASME specification Specify weld procedure, bore dimensions, pressure class, and inspection requirements.
Custom Inconel 625 flanges By design and purchase specification By design and purchase specification By design and purchase specification Confirm flange type, dimensions, facing, drilling, heat treatment, and material traceability.

 

 

 

 

Values shown are reference data for product selection. Purchase orders should define the exact standard, condition, inspection scope and certificate requirement.

Quotation Checklist

Information to confirm for your order

Share your requirements, including material, size, quantity, and specifications, for a fast quotation.

Material

Grade name, UNS number, equivalent grade or project material code.

Pipe Size

OD / NPS, wall thickness or schedule, length, tolerance and quantity.

Standard

ASTM, ASME, EN, DIN, drawing or customer specification.

Condition

Seamless, welded, annealed, solution annealed, pickled or polished.

Inspection

MTC EN10204 3.1, PMI, UT / ET, hydrotest and dimensional report.

Delivery

Destination, packing requirement, shipping method and delivery deadline.

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FAQ

Frequently asked questions about Inconel 625 Flanges

FAQ content helps cover buyer questions and supports SEO for long-tail product searches.

Inconel 625 Flanges are used to connect pipes, valves and equipment in marine, offshore, chemical processing, oil and gas, aerospace and high-temperature piping systems.

Available types include weld neck, slip-on, blind, socket weld, threaded, lap joint, reducing and spectacle blind flanges, as well as custom designs.

Common material standards include ASTM B564 and ASME SB564, with dimensions according to ASME B16.5, ASME B16.47 or customer specifications.

Inconel 625 Flanges can be supplied in pressure classes such as 150, 300, 600, 900, 1500 and 2500, subject to size, design temperature and project requirements.

Yes. Material can be supplied with an EN10204 3.1 certificate, heat number traceability, chemical composition, mechanical test results, PMI and dimensional inspection reports.

Please provide the flange type, nominal size, pressure class, facing, schedule, quantity, standard, surface finish, certificate requirements and destination.

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Send your pipe size, standard and quantity

For faster feedback, include OD / NPS, wall thickness or schedule, length, quantity, standard, certificate requirement and destination. If you have a drawing or project specification, send it with the inquiry.

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