Analysis of Dissimilar Metal Welds: X3CRNIMO.13-4 (1.4313) & CarbonSteel S355J2+N

  • Mathew N. Kyalo
  • James K. Kimotho

Abstract

In manufacturing, many applications require welding of dissimilar materials. Stainless steel and carbon steel are oftenwelded together in applications such as nuclear, hydro power, chemical, and petrochemical plants. Sufficient data on welding ofsuch dissimilar materials may not be available or may insufficient. Samples ofX3CrNiMo.13-4 stainless steel and S355J2+N carbonsteel used by Heavy Engineering Ltd Companyin hydro power project were used in this study. The samples were welded as per theirprocedures at specified voltages and feed speeds. The as received samples were sectioned and prepared for optical and microstructuralanalysis.Tensile, impact and hardnesstests were carried out to evaluate mechanical properties of the samples. After microstructuralanalysis, the thermally unaffected base material, S355J2+N carbon steel showed ferritic-perlite structure and the base materialX3CrNiMo.13-4 stainless steel showed a martensitic structure. In the heat affected zone (HAZ) on the stainless steel side, the grainstructure was observed to havetransformed and there was complete fusion. In the HAZ on the CS side, the grain structure of the weldpenetrates the CS side in the shape of dendrites. During tensile testing failure occurred on the, S355J2+N base material implying that thewelding method adopted was satisfactory. The highest hardness value (200 HB) was obtained on the weld area.
Published
Oct 7, 2019
How to Cite
KYALO, Mathew N.; KIMOTHO, James K.. Analysis of Dissimilar Metal Welds: X3CRNIMO.13-4 (1.4313) & CarbonSteel S355J2+N. Proceedings of Sustainable Research and Innovation Conference, [S.l.], p. 9-12, oct. 2019. ISSN 2079-6226. Available at: <http://sri.jkuat.ac.ke/ojs/index.php/proceedings/article/view/760>. Date accessed: 06 apr. 2020.