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Welding Characteristics Of Duplex Stainless Steel
- Aug 22, 2018 -

Compared with ferritic and austenitic stainless steels, bi-phase stainless steels have good welding performance. Compared with ferritic stainless steels and austenitic stainless steels, they are neither like the welding heat affected zone of ferritic stainless steels nor sensitive to welding thermal cracks due to serious grain coarsening, which greatly reduces plastic toughness.

Due to its special advantages, dual-phase stainless steel is widely used in petrochemical equipment, seawater and wastewater treatment equipment, oil and gas pipeline, paper making machinery and other industrial fields.

The welding performance of economical double - phase steel is often a problem. And welding standard duplex steel is not a problem, and regardless of the process, there are suitable welding materials for these applications. From a metallographic point of view, welding 2101 (1.4162) is not a problem at all, in fact it is even easier to weld than standard duplex steels because the material can actually be welded using an acetylene welding process, which must always be avoided for standard duplex steels. The practical problem of welding 2101 is that the viscosity of molten pool is different, so the wettability is a little worse. This forces operators to use more arc welding during the welding process, which is where the problem lies. Although it can be made up by choosing superalloyed solders, we often want to choose matching solders.

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