Engineered for extreme conditions: Duplex structures with superior strength & corrosion resistance

Stalatube supplies a comprehensive range of duplex structural components, such as hollow sections, L-profiles, U-channels and I-beams. We also offer additional processing, such as tube and plate laser cutting, polishing and cut-to-length.

Duplex in general

Duplex is a category of several stainless-steel grades and is named this way because of the two-phase structure. It consists of a mixture of austenite and ferrite in roughly equal proportions. Unlike the one-phase materials like 316L, which is austenitic, the microstructure of duplex is both austenitic and ferritic. The combination of the two phases gives this material a combination of attractive advantages. Duplex stainless steels are subdivided into lean, standard, super, or hyper duplex based on the quantity of alloying elements. 

In offshore applications, Lean duplex EN 1.4162 /1.4362 (EDX) and duplex EN 1.4462 are mainly used. Lean duplex contains less Nickel and is therefore a more affordable and sustainable choice when the material specification is sufficient. 

For more demanding applications, one has developed superduplex and even hyperduplex .

EDX at a glance

Maximize your project’s value and performance with EN 1.4362 / LEAN DUPLEX UNS S32304 / EDX 2304 stainless steel that delivers superior strength and corrosion resistance. Its dual-phase microstructure provides twice the strength of 316L, allowing you to design with lightweight sections for significant weight and cost savings. Choose EDX for exceptional performance in challenging, chloride-rich environments, ensuring excellent resistance to stress corrosion cracking and extended service life for your high-performance structures.

Corrosion resistance

EDX is an advanced, nitrogen-enhanced stainless steel specifically engineered for outstanding performance in harsh, chloride-rich environments. Its balanced duplex microstructure provides exceptional resistance to pitting, crevice corrosion, and chloride stress corrosion cracking, addressing critical failure points common in standard austenitic steels. With higher levels of key alloying elements like Chromium and Nitrogen, the EDX ensures superior durability and reduced life-cycle costs compared to traditional austenitic grades. This robust material guarantees extended reliability for demanding applications such as offshore structures.

Weight saving potential

With the EDX superstrength, you can save up to 44 % ⁽¹ (read a study) of the structural weight of your structure. This will lower the overall structural and assembly cost among environmental impact.

Life cycle and sustainability

EDX provides a dramatically lower Life Cycle Cost and superior sustainability profile by practically eliminating maintenance and replacement needs over its extended lifespan. Unlike any other typical steel grade, EDX offers durable, corrosion-free performance for close to an unlimited service life.

Stainless steel is 100% recyclable at the end of its life, which makes it a responsible, long-term economic choice. Furthermore, during the life cycle, no single piece of toxic paint is ending up in the sea.

Try it yourself! Request the EN 1.4362 (EDX 2304) corrosion tube sample