Lord Fin Tube-SA789-S31803 Extruded Fin Tube from China

ASME SA789 S31803 specification covers grades of nominal wall thickness, stainless steel tubing for services requiring general corrosion resistance, with particular emphasis on resistance to stress corrosion cracking. These steels are susceptible to embrittlement if used for prolonged periods at elevated temperatures.

Typical SA789-S31803 Extruded Fin Tube Size

What is duplex stainless steel?

Duplex stainless steel is a kind of stainless steel material. They are called biphasic (or austenite-ferrite) because their metallurgical structure consists of two phases, with almost equal proportions of austenite and ferrite. These materials have improved corrosion resistance, particularly chloride stress corrosion and chloride pitting, and have higher strength than standard austenitic stainless steels such as SS304 or SS316. Compared with austenitic stainless steel, the main difference in composition of duplex steel is the chromium content of 20-28% higher; Molybdenum content is high, up to 5%; The nickel content was reduced to 9% and the nitrogen content was reduced to 0.05-0.50%. Both low nickel content and high strength are significantly cost effective.

We are a professional company for the production of ASTM SA789 SA-789 duplex steel 2205 UNS S31803 UNS S32205 Finned tubes.

U Bend SA789-S31803 Extruded Fin Tube