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Here is short summary about duplex stainless steel is and how it differs from other stainless steels.

With 90 years having passed since duplex stainless steel was developed at Avesta in Sweden, Marie-Louise Falkland, Outokumpu’s Senior Technical Manager, answers a few questions about her role in developing duplex grades and educating the market.

As we celebrate 90 years since duplex stainless steel was developed, we caught up with Erik Schedin. He recently retired as design and fabrication manager at our Avesta Research Center in Sweden and he shares his insight into construction and fabrication of duplex grades as well as developing formable duplex grades.

Manufacturers of tube heat exchangers have used duplex grades since the 1960s and 1970s due to their corrosion resistance. Duplex stainless steel enables a long life and minimizes process downtime. In addition, its high strength means that tubes can have thin walls that maximize the transfer of heat.

Duplex stainless steel has been important to the pulp and paper industry since the early 1930s when the first grades were developed by Outokumpu. It is used in many applications from preparation of wood chips to paper making.

The chemical process industry’s use of duplex stainless steel has followed in the footsteps of the pulp and paper industry since the early 1930s when the first duplex grades were developed by Outokumpu.