Quality testing and fracture mode estimation for welded pipes of grade 321 stainless steel

V. P. Darji ,P. H. Darji, K. Baba Pai

Abstract

The enormous existing and promising technology have tailored the structural and fractural analysis with measuring means. Stainless steel pipes are welded using tungsten inert gas welding technique. In its very primary stage of preparation only weld bead is removed with bead fitted mills. Welded segments and pipes are also subjected to different heat treatment and mechanical operations. These pipes are used in precise applications in refineries and petrochemical plants where they bear ambient pressure/temperature conditions. Because of heat treatable condition requirement the steel is worked with austenitic phase condition. Stainless steels with γ phase has relatively high ductility, low yielding strength, high tensile strength with ease in fabrication and Ti makes the alloy good corrosion resistant. This may lead to corrosion of welded segments in ambient temperature conditions. Present work deals with the effect of weld gases, alloying element added (Titanium) on the strength and microstructure of the 321 type Stainless Steel. Apart from the benefits of TIG, hot-cracking susceptibility can be industrially exploited and HAZ is satisfactorily would be analyzed using ultrasonic testing. For the present work, we have limited our work up to the spectroscopic chemical analysis of the parent metal and weldment.

Keywords

Stainless steel grade 321; Titanium; TIG; spectroscopic analysis

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IMEKO-TC14-2007-65.pdf

DOI

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IMEKO TC

TC14 - Measurement of Geometrical Quantities

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