Austenitic
Duplex Steel
Nickel Alloy
Cobalt Alloy

What is duplex stainless steel tube?

What do you know about duplex steel tube

Duplex steel tubes offer excellent welding performance and corrosion resistance, combining the strengths of ferritic and austenitic stainless steels. MTSCO provides a variety of duplex steel grades like 31803/32205, 32750, and 32760 for diverse industrial applications.

Duplex steel tube is a special type of stainless steel tube, its welding performance is good, compared with ferritic and austenitic stainless steel, it is neither like ferritic stainless steel in the weld heat-affected zone due to severe grain coarsening and greatly reduce the plastic toughness, but also like austenitic stainless steel as the weld Sensitive to weld thermal cracking. It is characterized by a 50/50 ratio of ferrite and austenite phases in its solid quench organization, a combination that provides the best overall performance.

MTSCO has nearly 20 years of experience in the duplex steel tubing industry and is able to offer a wide range of duplex steel qualities. For example, 31803/S32205, 32750, 32760, etc.. They have different properties and applications due to their different chemical compositions.

31803/32205 Duplex Steel Tube

S31803 is a kind of stainless steel with duplex structure, its grade is usually 2205. S31803 has the advantages of high strength, high corrosion resistance and good welding performance, which is an ideal structural material.S31803 can be supplied in the form of plates, coils, tubes, profiles and so on, which are widely used in the fields of chemical industry, petroleum, shipbuilding, nuclear power and so on.

32750 Duplex Steel Tube

S32750 is an alloy with Nb and Ta additions. The alloy has excellent mechanical properties and corrosion resistance in high temperature environments. S32750 high temperature alloy has excellent mechanical properties including high strength, good plasticity and toughness. It can be used in a variety of applications including aerospace, energy, chemical and marine engineering.

32760 Duplex Steel Tube

S32760 is a super duplex stainless steel supplied in the hot worked and solution annealed condition. As a super duplex stainless steel, it combines the desirable aspects of austenitic and ferritic grades. The higher chromium, molybdenum and nitrogen content results in a Pitting Resistance Equivalent Value (PREN) > 40, which provides pitting and crevice corrosion performance superior to austenitic and duplex stainless steels in virtually all corrosive media.

Of course there are many other duplex steels made of different materials, such as S32304, S32101, S31500, etc., which can be selected for different usage scenarios due to their different chemical compositions, which determine their different physico-chemical properties.