News | Case | Contact us Welcome to BEBON INTERNATIONAL
You are here: bebon steel > Product > ViewsDuplex Stainless Steel

Duplex Stainless Steel

Type of steel:

 Bebon is professional duplex stainless steel manufacturer. We can offer duplex stainless steel plate, duplex stainless steel bar and duplex stainless steel pipe. 

Duplex stainless steels have a mixed microstructure of austenite and ferrite, the aim usually being to produce a 50/50 mix, although in commercial alloys the ratio may be 40/60. Duplex stainless steels have roughly twice the strength compared to austenitic stainless steels and also improved resistance to localized corrosion, particularly pitting, crevice corrosion and stress corrosion cracking. They are characterized by high chromium (19–32%) and molybdenum (up to 5%) and lower nickel contents than austenitic stainless steels.
The properties of duplex stainless steels are achieved with an overall lower alloy content than similar-performing super-austenitic grades, making their use cost-effective for many applications. Duplex grades are characterized into groups based on their alloy content and corrosion resistance.
Lean duplex ss: UNS S32101 (LDX 2101), S32202 (UR2202), S32304 and S32003
Standard duplex ss: UNS S31803/S32205 (2205)
Super duplex ss: S32760, S32750 (2507) and S32550
Duplex stainless steel has a ductile to brittle transition temperature of about -40°C or lower. These steels can also become embrittled when exposed to temperatures between 300°C and 550°C (475°C embrittlement) and 550°C and 1 000°C (sigma (σ) and chi (χ) phase formation). Thus, application temperatures are generally limited from -50°C to 300°C. Therefore, duplex stainless steel can be used in oil refining, fertilizer, paper making, petroleum, chemical resistance, high temperature concentrated nitric seawater heat exchangers and cold shower unit and devices. 
For duplex stainless steel price, please feel free to contact us. Bebon offers prime quality of duplex stainless steel. 

Hot product