Duplex Stainless Steel 2205 Casting Parts

DUPLEX S.S.2205 FIN TUBE

ASTM A240/A240M--01 2205 is a duplex stainless steel with its chemical composition of 21% chromium, 2.5% molybdenum and 4.5% nickel-nitrogen alloy. It has high strength, good impact toughness and good integral and local resistance to stress corrosion. The Compared with 316L and 317L austenitic stainless steel, 2205 alloy has superior properties in resisting plaque and crevice corrosion. It has high corrosion resistance and lower thermal expansion coefficient than austenite.

APPLICATION OF DUPLEX S.S.2205 FIN TUBE

Boilers, economizers, heat exchangers (chemical processing industry).

Sewage treatment system.

Pulp and paper industry classifiers, bleaching equipment, storage handling systems.

For high-strength, corrosion-resistant environments.

Food processing equipment

WHY DUPLEX S.S.2205 FIN TUBE

Due to chromium content (22%), molybdenum (3%) and nitrogen content (0.18%), the corrosion resistance of 2205 is superior to 316L and 317L in most environments.

Local corrosion resistance

The content of chromium, molybdenum and nitrogen in 2205 duplex stainless steel makes it highly resistant to pitting corrosion and crevice corrosion in oxidizing and acidic solutions.

Stress corrosion resistance

The two-phase microstructure of stainless steel helps to improve the resistance to stress corrosion cracking of stainless steel. Chloride stress corrosion occurs in austenitic stainless steels in the presence of certain temperatures, tensions, oxygen and chlorides. Since these conditions are not easily controlled, the use of 304L, 316L and 317L is limited in this respect.

Corrosion resistance

The high strength and corrosion resistance of 2205 duplex steels provide high corrosion fatigue strength. Processing equipment is susceptible to corrosive environments and loading cycles, and the 2205's features are ideal for such applications.