With the ever-increasing demand for duplex stainless steel process equipment fabricators have developed procedures for the welding and fabrication of these grades. A lot of data on these procedures as well as practical experiences have become available. When fabricating duplex stainless steels special attention should be paid to heat treatment and welding. Unsuitable heat treatment can result in precipitation of intermetallic phase and deterioration of toughness and corrosion resistance. Although most welding methods can be used to weld duplex steels, they require special procedures for the retention of properties after welding. Below you will find some general guidelines for welding duplex stainless steels

With the ever-increasing demand for duplex stainless steel process equipment fabricators have developed procedures for the welding and fabrication of these grades. A lot of data on these procedures as well as practical experiences have become available. When fabricating duplex stainless steels special attention should be paid to heat treatment and welding. Unsuitable heat treatment can result in precipitation of intermetallic phase and deterioration of toughness and corrosion resistance. Although most welding methods can be used to weld duplex steels, they require special procedures for the retention of properties after welding. Below you will find some general guidelines for welding duplex stainless steels.

Introduction

It is assumed that the reader already has experience in welding of austenitic stainless steels such as Type 316L.This section addresses some to commonly discussed welding characteristics and procedures of the duplex stainless steels in terms of how they differ from austenitic stainless steels. Addressing each of these features is essential for the design of technically and economically effective welding procedures to be qualified.

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