Introduction

Overview

Austenitic - ferritic duplex stainless steel embodies the features of both austenitic and ferritic stainless steels, with ferrite accounting for 50% and austenite approximately or at least 30%. It is also a nickel-saving stainless steel. In the case of low carbon content, the Cr content is 18% to 28%, and the Ni content is 3% to 10%. Some duplex also contains alloying elements such as Mo, Cu, Nb, Ti, and N. The commonly used duplex grades are S31803, 2205, and 2507.

Features & Comparisons of Duplex Stainless Steel

Duplex stainless steel features excellent pitting corrosion resistance and super plasticity. Compared with ferrite, it features better toughness, plasticity, intergranular corrosion resistance, weldability, and iron retention. It maintains the brittleness at 475°C and high thermal conductivity like Ferrite, yet it is free from room temperature brittleness. In comparison with Austenitic stainless steel, it features high strength and excellent resistance to intergranular corrosion and chloride stress corrosion.

Applications

Duplex stainless steels are widely used in petroleum and natural gas, biofuels, construction industry, and many other fields. It has significant implications for industrial construction.

Contact

If you want to buy Duplex stainless steel products, please contact the RIGHT supplier - Bhagirath Steel Alloy to get the latest price.