HOT TENSILE PROPERTIES OF AUTOGENOUS GAS TUNGSTEN ARC WELDED AISI 304HCU SUPER AUSTENITIC STAINLESS STEEL JOINTS

Authors

  • Vinoth Kumar M Department of Manufacturing Engineering, Annamalai University, Annamalainagar – 608 002, Tamilnadu, India.
  • Balasubramanian V Centre for Materials Joining and Research (CEMAJOR) ,Department of Manufacturing Engineering, Annamalai University, Annamalai Nagar - 608 002 ,Tamil Nadu, India.
  • Gourav Rao A Naval Materials Research Laboratory (NMRL), Ambernath, Mumbai - 421 506, India.

Keywords:

AISI 304HCu Austenitic stainless steel, Gas Tungsten Arc welding, Hot tensile properties, microstructure

Abstract

The USC boilers operate at higher steam temperature and pressure which in turn increase the efficiency of the power plant. The recently developed AISI 304HCu austenitic stainless steel with nominal composition of 0.1C-18Cr-9Ni-3Cu-Nb-N is listed as a candidate material for superheaters and reheaters in the U.S program for development of materials for USC with steam temperatures of 760 °C. Welding may cause the changes in microstructure and result in local compositional variation due to segregation, which alters the solidified phases in room temperature and may affect the mechanical properties. The hot tensile properties of autogenously gas tungsten arc welded AISI 304HCu austenitic stainless steel tubes were evaluated. Autogenous welding of AISI 304HCu resulted in inferior weld joint with tensile strength lower than the parent metal both at room temperature and high temperatures.

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Published

2015-09-01

How to Cite

[1]
Vinoth Kumar M, Balasubramanian V, and Gourav Rao A, “HOT TENSILE PROPERTIES OF AUTOGENOUS GAS TUNGSTEN ARC WELDED AISI 304HCU SUPER AUSTENITIC STAINLESS STEEL JOINTS”, JME, vol. 10, no. 3, pp. 144–150, Sep. 2015.

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