While types of stainless steel will share some properties, to find the optimal traits and price point for your needs, first you need to understand the different types available.

Stainless steel production continues to rise year after year due to its versatility, durability, and affordability.

Stainless steel is not just a single alloy.

While chromium provides a significant portion of stainless steel’s corrosion resistance, today’s stainless steel is made up of nearly infinite combinations of different metals.

Choosing the right alloy for your product is one of the first stages in selecting the best possibilities when dealing with stainless steel.

Let’s take a look at some of the most frequent varieties and factors to consider.

STAINLESS STEEL FAMILIES: FOUR OPTIONS WITH UNIQUE PROPERTIES

Families refer to specific qualities and indicate the metal ratios in the alloy. Stainless steel is divided into four categories:

• Stainless Steel (Austenitic)

• Stainless Steel (Ferritic)

• Stainless Steel Duplex

• Stainless Steel with Martensitic and Precipitation Hardening

There are four choices, but today we’ll focus on the stainless steel that outperforms the others, the sort of stainless steel that could be the next big thing in stainless steel i.e., Duplex Stainless Steel.

WHAT IS DUPLEX STAINLESS STEEL?

Duplex stainless steel (DSS) is named after its two-phase microstructure, which includes both ferritic and austenitic stainless steel. DSS was first launched some 70 years ago, although it has only recently increased in popularity. A new version of Duplex was created in the early 1980s, this time with increased weldability due to higher nitrogen content.

Duplex Stainless Steel Has a Variety of Attractive Advantages, including:

• Toughness and Ductility – Duplex stainless steel is much tougher and more ductile than ferritic grades, although not as tough as austenitic grades.

• DDS has twice the strength of normal stainless steel, as well as superior fatigue resistance and low thermal expansion.

• Corrosion Resistance – This is always determined by the stainless steel’s composition. When it comes to corrosion resistance, the concentration of chromium, nitrogen, and molybdenum are the most significant aspects to consider.

• Cost – due to the reduced alloying content, duplex stainless steels are typically less expensive than other varieties. Furthermore, because of DSS’s yield strength, it is frequently possible to lower its thickness, resulting in cost and weight savings when compared to austenitic grades.

Tubes and Pipes made of duplex stainless steel

The welding performance of duplex stainless-steel tube is excellent. It is not like the welding heat affected zone of ferritic stainless steel, and the plastic toughness is considerably reduced due to extreme grain coarsening, as compared to ferritic stainless steel and austenitic stainless steel. It is more susceptible to hot cracking in welding than austenitic stainless steel. The market for seamless tube manufacturers in India is expected to grow at a significant rate over the forthcoming years, the market is likely to develop at a steady rate through 2021.

In comparison to normal austenitic stainless-steel grades, the Duplex Welded Pipe offers much better tensile strength. Duplex Pipe is cost-effective due to the decreased nickel percentage of the alloy.  Mostly Duplex Steel Pipes are only employed in the offshore oil and gas business. 

A Material for the Future – Growth of end-use industries in emerging countries drives the global duplex stainless steel market

Oil and gas, construction, chemical processing, and wastewater treatment are some of the most common end-use sectors for duplex stainless steel. Duplex stainless steel is commonly employed in adverse situations such as seawater and chemical reactions because of its high corrosion-resistant qualities. 

To a large extent, offshore oil and gas activities rely on duplex stainless-steel equipment to operate in harsh environments. The need for duplex stainless steel is increasing in the oil and gas industry, thanks to increased oil and gas exploration operations and an increase in deep-water exploration activities.

Chemical tankers, digesters in the pulp and paper industry, desalination equipment, and other items are produced with duplex stainless steel. Construction, wastewater treatment, and other end-use sectors are predicted to grow strongly in growing economies such as China, India, Indonesia, and Thailand during the next five years. In the Asia-Pacific area, the building sector is likewise thriving and predicted to develop. In the near future, the rise of end-use industries will also significantly drive the market for duplex stainless steel.

Between 2016 and 2021, the duplex stainless steel market is expected to grow at a CAGR of 4.7 percent, from USD 2.70 billion in 2016 to USD 3.40 billion in 2021. This global demand for duplex stainless steel is predicted to be fueled owing to the increase in building and construction activities, as well as an increase in oil and gas exploration operations.

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