Influence of filler wire on metallurgical, mechanical, and corrosion behaviour of 430 ferritic stainless steel using a fusion welding process

Abstract

The advantage of ferritic stainless steels (FSS's) over austenitic stainless steels is that they are less expensive alloys. This is due to low or negligible nickel in its alloying element which makes the steel affordable. This type of steel is highly recommended against chloride attack and is also machinable to produce various components for engineering applications. This study examines the effect of various fillers on 430 ferritic stainless steel (FSS). The austenitic (308) and ferritic (410) grades of filler were used to study the weldability, microstructure, mechanical properties, and corrosion resistance using tungsten inert gas welding. The findings showed the emergence of various complex phases in both the weld sample. The sample welded with 410 filler shows acicular ferrite, martensite and austenite. Whereas, austenite and vermicular ferrite are observed in the sample welded with 308 filler. Based on compositions and solidification modes, the mechanical properties of welded joints also vary. It was found that ferritic mode solidified welds dominated in terms of qualities, which was found in 410 filler. In the chloride solution, the behaviour of the pitting corrosion resistance of each weld varied. The sample welded with 410 was superior corrosion resistance. This is due to more δ-ferrite in the weld sample. Whereas, 308 showed poorer resistance against the simulated seawater solution. In 410 welds, a greater degree of sensitization was observed, as compared to 308 welds.

Investigation of ER308L and ER309L filler wires on dissimilar metals between carbon steel and 3CR12 ferritic stainless steel by GTAW through boiler fabrication in a sugar factory

“…In addition, Bhadeshia and Honeycombe [39] explained the relationship between the carbon content and hardness of martensite, and that an appropriate carbon content results in suitable hardness results. Studies by Araújo et al [40] and Bansod et al [41] reported hardness values in the fusion zone with ER308L and 308 filler wires, which presented results similar to those verified in the present work. Hardness values of approximately 175, 182, and 180 HV of the 70A-ER308L fusion zone [26] were higher than those of the 70A-ER309L and 100A-ER309L fusion zones.…”

A Review: Sensitization in stainless steel

“…Austenitic stainless steels are the most widely used metal due to its important and superior properties like ductility, drawability, strength, toughness, wear resistance, fabricability, corrosion resistance etc.. [1], [2] It has applications in many industries like tableware, pipes, pressure vessel, biomedical implants etc. [3]- [6] Some applications like steam generating plants, superheating tube materials is because of its elevated temperature properties.…”

Mechanical characteristics and stretch-bend failure analysis on ultra high frequency pulsed gas tungsten arc welded thin FSS 409/430 dissimilar joints

“…Ferritic Stainless Steels (FSSs) have acquired recognition in industrial use due to their high resistance to wear [1]. They are cheap and exhibit high formability compared to their austenitic equivalents [2]. FSSs also demonstrate enhanced thermal conductivity, making them appropriate for high-temperature applications [3].…”