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Duplex steel 2507

Duplex steel 2507

Place of Origin : Zhejiang,China
Brand Name : X&FSTEEL
Model Number : 2507
Certification : China Classification Society Certification, ISO9001 Quality System Certification
Packaging Details : Wrapped with woven bag package
Delivery Time : The delivery time is according to the order
Payment Terms : 30%T/T
MOQ : 2 tons
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2507 Stainless Steel

2507 is a ferrite austenite (two-phase) stainless steel, it has integrated many properties of ferritic steel and austenitic steel , because the content of chromium and molybdenum is very high, so it has very good resistance to pitting corrosion, crevice corrosion and uniform corrosion ability. Two-way microstructure ensures that the steel has a high ability to resist stress corrosion cracking, and the mechanical strength is high.

2507 stainless steel used in the oil and gas industry; Offshoreoil platform(heat exchanger tube, water treatment and water supply system, fire control system, hydraulic system, stable water system; petrochemical equipment; desalination (dilute) equipment, and equipment of the high pressure pipe, water pipe), need to have both high strength and high corrosion resistance of mechanical structure and components; fuel(or waste) gas purification equipment .

Main Component25Cr-7Ni-4Mo-0.27N

Grades of Different Standard

ASTM/ASME:A240 - UNS S32750

EURONORM:1.4410 - X2 Cr Ni MoN 25.7.4

AFNOR:Z3 CN 25.06 Az

DIN/EN 1.4410ASME SA-240

Corrosion Resistance

1.General corrosion

SAF 2507,due to high content of chromium and molybdenum ,has strong overall corrosion resistancefor organic acids such as formic acid, acetic acid etc. With strong overall corrosion resistance ability. SAF2507 alloy has stronger ability to resist corrosion for inorganic acid, especially those containing chlorides .Comparison with 904L, SAF2507 has stronger ability to resist corrosion for dilute sulfuric acid mixed with chloride ions .904Lis alloy of austenitic state , dedicated to resist the corrosion of pure sulfuric acid .316Lstainless cannot be used in hydrochloric acid environment, it may have been partial or whole corrosion. SAF2507 can be used to dilute hydrochloric acid environment, has strong ability to resist spot lossand crevice corrosion .

2.Intergranular Corrosion

The low carbon content NSAF 2507 is greatly reduced the risk of intergranular carbides precipitate during heat treatment, as a result, this alloy has a strong resistance to intergranular corrosion associated with carbide.

3.Stress Corrosion Cracking

Double entry structure of SAF 2507 makes it has stronger ability to resist stress corrosion cracking. Due to its high alloy content, the corrosion resistance and strength of SAF 2507 is better than that of 2205.In construction,cracks is almost inevitable, this makes stainless steel is more susceptible to corrosion in chloride environment . SAF 2507 have a strong ability to resist crack corrosion. The corrosion curve of SAF2507 inthe sulfate that contains 2000 PPM of chlorine ion is0.1 mm/year; and0.1 mm/year in the hydrochloric acid .

Welding materials:ER2594welding wireE2594welding rod

Application Range

Pulp and paper industry, seawater desalination, flue gas purification, heat exchanger, chemical liquid cargo ship piping system, water system, etc.

Chemical Components


After solid solution treatment in appropriate , the microstructure of 2507 stainless steel has a dual phase structure of ideal ,the ratio of the alpha/gamma is about 50/50. When the solid solution temperature above1050, with the temperature rising, steel ferrite phase number can increase somewhat, but due to the high content of nitrogen , the phase proportion would be no significant change at just under1300.

Mechanical Property

Room temperature mechanical properties of 2507 duplex stainless steel pipe:

Rolling shapes:THK≤20mmTensile Strengthδb/MPa800-1000Yield Strengthδ0.2/MPa≥550Elongationδ5/%≥25HV290

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2507 Stainless Steel


Duplex steel 2507

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