Duplex stainless steel has austenite and ferrite duplex structure, and ferrite and austenite each account for about 50%, generally less phase content at least need to reach 30%. Therefore, it has the characteristics of both austenitic stainless steel and ferritic stainless steel. Duplex stainless steel has good resistance to chloride pitting and crevice pitting, excellent mechanical properties, yield strength is more than twice that of austenitic stainless steel under certain conditions, thermal conductivity is higher than austenitic, plasticity and toughness are better than ferrite.
1. Excellent comprehensive corrosion resistance and local corrosion resistance, especially stress corrosion resistance, pitting corrosion resistance, crevice corrosion resistance, corrosion fatigue and abrasion resistance, etc.
2. Compared with austenitic stainless steel, the thermal conductivity is large and the linear expansion coefficient is small. The heat exchange tube of the heat exchanger using this material has higher heat exchange efficiency than austenitic stainless steel.
3. Good comprehensive mechanical properties 4. Good intergranular corrosion resistance 5. Long service life
Our company can produce 2205 2507 329LD and other dual-phase steel grades of straight seam welded pipe.
Widely used in high-pressure pipelines, heat exchangers, oil and gas pipelines, sewage treatment systems, food processing, chemical industry and other fields.
|Application in the field of heat exchanger
||Application in chemical industry
|Application in petrochemical field
||Application in the field of food production