Submerged arc welding of thick ferritic martensitic 12Cr stainless steel with a variety of consumables

Abstract

Modified X2CrNi12 stainless steel, conforming to EN 1?4003 and UNS S41003 grades, has been designed with less carbon (,0?015%) and impurities to improve the weldability and mechanical properties. The present paper deals with submerged arc welding (SAW) of 30 mm thick plates of this steel with austenitic and duplex stainless steel consumables. Several samples extracted from the welded joints were subjected to mechanical testing by means of tensile, bend, Charpy impact and crack tip opening displacement (CTOD) fracture toughness tests. Microstructural examination including grain size analysis, hardness and ferrite measurements was carried out. Salt spray and blister tests as corrosion testing were applied. Considering all data obtained, it can be recommended to use austenitic filler metals as an economic alternative for SAW of this steel in the areas where impact is anticipated and adequate atmospheric corrosion resistance is needed since the weld made with austenitic wires exhibited very encouraging low temperature impact toughness properties related with finer grained microstructure and adequate strength and corrosion properties.

Laser welding of modified 12% Cr stainless steel: Strength, fatigue, toughness, microstructure and corrosion properties

“…For the long term maintenance costs, this modified low carbon X2CrNi12 stainless steel requires less coating renewals offering a substantial economic and considerable environmental advantage. For other applications, when compared with higher alloyed stainless steels, the use of this modified steel with improved weldability would be more economical [12,[16][17][18][19]23,25,[37][38][39][40][41][42][43][44].…”

Metallurgical and Mechanical Properties Variation Along the Thickness of Electron Beam Welded Ferritic Stainless Steel Joints After Postweld Heat Treatment

“…The ability of the EBW process to weld at low heat input leads to retain high ferrite content. Taban et al [51,52] also experienced similar behavior while analyzing the ferrite content of the weld joint. The weld joints possessed ferrite content nearly equal to as predicted by the Balmforth and Lippold constituent diagram.…”