Duplex 90 years

Summary about duplex stainless steel is and how it differs from other stainless steels.

As we’re marking the 90th anniversary of duplex stainless steel, it’s worth looking back at the big milestones in its development.

Our experts share their thoughts on what the future holds for duplex grades.

Over the years, duplex grades have been used in many applications that need a combination of high strength, corrosion resistance and competitive price.

Peder Claesson explores how duplex grades can provide new design opportunities.

Marie-Louise Falkland answers a few questions about her role in developing duplex grades and educating the market.

Erik Schedin shares his insight into construction and fabrication of duplex grades as well as developing formable duplex grades.

Elisabet Alfonsson shares her experience of developing the first lean duplex grade.

Duplex stainless steel is an attractive material for bridges and structures due to its high-strength and extreme corrosion resistance.

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.

Cleaning up flue gas emissions needs a material with excellent corrosion resistance.

Stainless steel is used widely in food and beverage production as it is hygienic and clean.

Due to its corrosion resistance duplex stainless steel enables a long life and minimizes process downtime.

Offshore oil and gas industry needs strong and long-lasting material to carry the flow of oil and gas ashore.

Duplex stainless steel has been important to the pulp and paper industry since the early 1930s when the first grades were developed.

Reinforced concrete combines concrete’s ability to withstand compression with steel’s tensile strength.

Transport tankers need to be reliable and efficient, and duplex stainless steel is often specified because of its high strength and corrosion resistance.

Håkan Rosén, founder of Stainless Steel Yachts Sweden(SSY), has always had a keen interest in life at sea. He started sailing at an early age and has owned a number of recreational boats. He heard about stainless steel, which is extremely resistant to corrosion.“It should be possible to build boats from this material,” he thought.

The 1930s were a time of technological developments that brought new opportunities. In this environment, it’s no surprise that metallurgists were exploring improvements to stainless steel, which was still relatively new at the time.