Tag: Duplex stainless steel

Development and application of duplex stainless steel

Duplex stainless steel has two kinds of metal phase structure, so the duplex stainless steel can combine the properties of ferritic stainless steel and austenitic stainless steel by properly controlling the chemical composition and heat treatment process, that is, the good toughness and welding of austenitic stainless steel. Performance combined with higher strength and chloride stress […]

Properties and classification of duplex stainless steel

The biphase in the name of the duplex stainless steel is mainly derived from the microstructure of the alloy. The duplex stainless steel usually contains about 50/50 austenite and delta ferrite phase mixture. Compared to austenitic stainless steel (for example, 304 or 316 stainless steel), duplex stainless steel has better corrosion resistance, especially chloride stress corrosion and […]

Barriers to the use of duplex stainless steel

The attractive combination of high strength, extensive corrosion resistance and moderate weldability seems to provide great potential for increasing the market share of duplex stainless steel. However, it is necessary to understand the limitations before using duplex stainless steel. The advantages of high strength can also be a drawback when considering formability and workability. High strength […]

A simple guide to duplex stainless steel

Duplex stainless steel is becoming more and more common. They can be produced in all major steel mills. The reasons for its general application are as follows: higher strength leads to weight saving, stronger corrosion resistance, especially stress corrosion cracking, high price stability and relatively cheap price. However, even with these advantages, the market share of […]

Development history of duplex stainless steel

Early development of duplex stainless steel: Duplex stainless steel, which combines many beneficial properties of ferritic and austenitic stainless steels, was originally developed in the early 1930s. The initial duplex stainless steel provides good performance characteristics but has limitations under welding conditions. The metallurgical process at the time was not suitable for producing grades with the […]

Duplex Stainless Steel Applications in the Oil and Gas Industry

In the past few decades, the severity of corrosion in the oil and gas industry has increased year by year. Because the offshore oil industry continues to push oil exploration deeper, it leads to higher pressure conditions and harsher environments. In addition, advanced technologies have increased the total capacity of domestic reservoirs, thereby increasing the […]

What matters to be noticed in the practical application of duplex stainless steel

Nowadays, duplex stainless steel is widely applied in various industrial fields, such as pulp and paper industry, oil and gas industry, chemical industry, dangerous goods transportation, pharmaceutical and food processing, and construction industry. In these industries, the duplex stainless steel is mainly used for the preparation of reaction containers, industrial equipment and various kinds of conveying pipes. […]

Development process and application industry of duplex stainless steel

The corrosion resistance of duplex stainless steel and corrosion fatigue performance is outstanding, widely used in equipment made of refining and chemical industry, salt industry and other industries in the atmospheric vacuum distillation unit and catalytic cracking and hydrocracking, continuous sulfate cooking or intermittent cooking device, compressor cooler operation environment is very bad. In spite of the […]

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