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Danyang Kaixin Alloy Material Co., Ltd.
Inconel 725
Product properties:

Product Name: Inconel 725 Nickel Alloy

Equivalent Grades: UNS N07725 / Alloy 725 / NiCr21Mo8Nb3Ti

Material Type: Age-Hardenable Nickel-Chromium-Molybdenum-Niobium Alloy

Product Forms: Welding Wire, TIG Rod, MIG Wire, Strip, Round Bar, Billet & Customized Products

Manufacturing Process: VIM + ESR (Vacuum Induction Melting & Electroslag Remelting)

Standards: ASTM B637, API 6A CRA, NACE MR0175 / ISO 15156, AWS A5.14 ERNiCrMo-15, ISO 18274 SNi7725

Certification: ISO9001:2015, ISO45001:2018, ISO14001:2015

Manufacturer: Danyang City Kaixin Alloy Material Co., Ltd.

Email: kaixinalloy@kx-alloy.com

Phone: +86 13776484780

Product Description

Inconel 725 is an age-hardenable nickel-chromium-molybdenum-niobium alloy with excellent strength, corrosion resistance, and resistance to hydrogen embrittlement. Designed for demanding environments including sour gas, high pressure, seawater, and elevated temperatures, it delivers reliable performance across oil and gas, offshore, chemical processing, marine, and energy industries.

Properties & Applications

 

Inconel 725 Key Features

Inconel 725 offers exceptional resistance to hydrogen embrittlement, sulfide stress cracking, pitting, crevice corrosion, and general corrosion, combined with high strength after age hardening, excellent resistance to sour gas environments, good weldability, stable mechanical properties under high pressure and elevated temperatures, and long-term reliability in demanding oil and gas, offshore, marine, chemical processing, and energy applications.

 

Inconel 725 Product Application

Inconel 725 (UNS N07725 / Alloy 725) is a high-performance age-hardenable nickel-chromium-molybdenum-niobium alloy widely used in industries requiring exceptional corrosion resistance, high strength, resistance to hydrogen embrittlement, and excellent performance in sour gas environments. Designed for demanding service conditions, Nickel Alloy 725 performs reliably under high pressure, elevated temperatures, seawater exposure, and aggressive corrosive media.

Typical Inconel 725 applications include:

Oil & Gas: Offshore drilling platforms, subsea equipment, wellhead components, valves, fasteners, pressure vessels, and downhole tools exposed to high-pressure sour gas environments.

Offshore Engineering: Subsea production systems, offshore structural components, risers, connectors, and high-strength equipment exposed to seawater and corrosive marine environments.

Chemical Processing: Reactors, heat exchangers, process piping, pressure equipment, and corrosion-resistant components used in demanding chemical environments.

Marine Engineering: Seawater systems, marine equipment, subsea components, pumps, valves, and structural parts requiring high strength and excellent corrosion resistance.

Power Generation: High-strength fasteners, pressure-containing components, heat-resistant equipment, and corrosion-resistant components used in demanding energy systems.

Aerospace & Industrial Engineering: High-strength structural components, fasteners, shafts, pressure-resistant parts, and other components requiring excellent mechanical properties and corrosion resistance.

Hydrogen & Sour Gas Service: Downhole equipment, completion components, tubing accessories, connectors, and other high-performance components requiring resistance to hydrogen embrittlement and sulfide stress cracking.

With its outstanding age-hardening response, high strength, corrosion resistance, and resistance to hydrogen embrittlement and sulfide stress cracking, Inconel 725 remains a trusted nickel alloy for demanding oil and gas, offshore, marine, chemical processing, and high-pressure industrial applications worldwide.

 

Kaixin Alloy offers custom alloy compositions, sizes, dimensions, and product specifications according to customer requirements.

 

Inconel 725Composition content
Ni:55%~59%
Cr:19~22.5%
Fe:2.34%~16.29%
Mo:7%~9.5%
Nb:2.75%~4.0%
Ti:1%~1.7%
Mn≤0.35%
AI≤0.35%
Si≤0.2%
C≤0.03%
P≤0.015%
S≤0.01%
Vacuum induction furnace
Electroslag remelting
Product physical properties
Density

ρ=8.31 g/cm³

Melting temperature range

1370-1425℃

Specifications

 

Product Forms & Available Sizes

 

 

Product Form

Available Sizes

Welding Wire

Diameter: 0.8–5.0 mm

TIG Welding Rod

Diameter: 1.6–6.4 mm

Nickel Alloy Strip

Thickness: 0.05–6 mm; Width: 5–350 mm

Round Bar

Diameter: 6–300 mm

Billet

Diameter: Up to 600 mm

Forged Bar

Customized Sizes

Sheet & Plate

Customized Sizes

Seamless Tube & Pipe

Customized Sizes

Wire Rod

Customized Sizes

Customized Components

Made to Customer Requirements

 

Mechanical Properties (Typical)

 

 

Property

Value

Tensile Strength

≥1240 MPa

Yield Strength (0.2%)

≥900 MPa

Elongation

≥30%

Hardness

Approximately 36 HRC

Density

8.30 g/cm³

Melting Range

1271–1343°C

 

Physical Properties

 

 

Property

Value

Density

8.30 g/cm³

Modulus of Elasticity

204 GPa

Thermal Conductivity

10.6 W/m·K

Electrical Resistivity

1.144 μΩ·m

Specific Heat

Approximately 435 J/kg·K

Coefficient of Thermal Expansion

13.0 μm/m·°C

Magnetic Property

Low magnetic permeability / Generally non-magnetic

 

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Quality Control & Certification
Product Quality Inspection & Third-Party Certification

Kaixin Alloy manufactures Inconel 725 (UNS N07725 / Alloy 725) in compliance with ASTM B637, API 6A CRA, NACE MR0175 / ISO 15156, applicable AWS welding material standards, and EN 10204.

Every production batch is tested for:

Chemical Composition Analysis

PMI Verification

Tensile & Yield Strength Testing

Hardness Testing

Non-Destructive Testing (NDT)

Final Product Inspection

We provide EN 10204 3.1 Certificates, Mill Test Certificates (MTCs), and full material traceability to ensure reliable performance for oil & gas, sour gas service, offshore engineering, marine applications, chemical processing, and high-pressure industrial applications.

Production process

 

 

Application scenario