UNS S31803 Duplex Steel Coils
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UNS S31803 Duplex Steel Coils

The pitting resistance of an austenitic stainless steel can be related directly to alloy composition, where chromium, molybdenum and nitrogen are a weight %. The Pitting Resistance Equivalent Number (PREN) uses the following formula to measure an alloy's relative pitting resistance - the higher the number, the better the pitting resistance.
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Product Introduction

Gnee Super Alloy (Tianjin) Co., Ltd. is one of the most professional manufacturers and suppliers of uns s31803 duplex steel coils in China. If you're going to wholesale high quality uns s31803 duplex steel coils made in China, welcome to get free sample from our factory. Good service and reasonable price are available.

 

UNS S31803 Duplex Steel Coils

 

chemical composition:

Chromium (Cr): about 22%

Nickel (Ni): about 5.0 - 6.0%

Molybdenum (Mo): about 3.0%

Nitrogen (N): about 0.18%

Main features:

Corrosion resistance: S31803 duplex stainless steel shows good performance in many corrosive environments, especially high resistance to pitting corrosion, crevice corrosion and stress corrosion cracking, especially in chloride-containing environments. .

Mechanical properties: Due to its unique dual-phase structure of ferrite and austenite, S31803 has higher strength than conventional austenitic stainless steel (tensile strength generally exceeds 500 MPa), while maintaining good toughness and ductility .

Weldability: Although the welding process requires special attention to prevent structural deterioration in the heat-affected zone, good welding results can be achieved with appropriate welding techniques and post-processing methods.

Application areas:

Chemical Equipment

Oil and gas industry

Marine engineering and shipbuilding

energy production facilities

Building structural parts

 

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