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Duplex Stainless Steel Performance

Oct. 17, 2019

Duplex stainless steel has good welding performance. Compared with Ferrite stainless steel and austenitic stainless steel, it is not like the welding heat affected zone of Ferrite stainless steel, and the plastic toughness is greatly reduced due to severe grain coarsening. Unlike austenitic stainless steels, they are sensitive to weld hot cracks. Alloy duplex stainless steel plate.2205 Duplex Stainless Steel Plate.

 Alloy duplex stainless steel plate

310S Stainless Steel Plate


Due to its special advantages, duplex stainless steel is widely used in petrochemical equipment, seawater and wastewater treatment equipment, oil and gas pipelines, papermaking machinery and other industrial fields. In recent years, it has also been studied in the field of bridge load-bearing structures. Development prospects.

"Conservative dual-phase steel" often has moist problems. Welding standard duplex steel is not a problem, and no matter what process is used, there are welding consumables suitable for these applications. From the perspective of metallurgy, welding 2101 (1.4162) is no problem at all, in fact it is even easier to weld than standard grade duplex steel, because this material can actually be welded using the acetylene welding process, and for standard duplex steel materials, This process must always be avoided. The practical problem with solder 2101 is that the viscosity of the bath is different and therefore the moist is a little worse. This forces the operator to use arc welding more during the soldering process, which is the problem. Where it can be compensated for by the choice of Super alloy consumables, we often want to choose a matching consumable.2205 Duplex Stainless Steel Plate.

2205 Duplex Stainless Steel Plate

316L Stainless Steel Sheet

In 2101, there is also a heat affected zone interaction between the microstructures in the low temperature heat affected zone and the high temperature heat affected zone, which is more advantageous than 2304, 2205 or 2507. When tested at 2101, it has also been found that due to the lower nickel content, different types of "tempering colors" containing more nitrogen and manganese are produced, which affects the corrosion performance. The loss of this component in the arc and the molten pool is due to the evaporation and deposition of nitrogen and manganese, which is a new problem for duplex steel grade materials, so it will be described more in this lecture. 

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