Austenitic stainless steels such as 304L are frequently used for hydrogen service applications due to their excellent resistance to hydrogen embrittlement. However, welds in austenitic stainless steels often contain microstructures that are more susceptible to the presence of hydrogen. This study examines the tensile strength and ductility of a multi-pass gas tungsten arc weld made on 304L cross-rolled plate using 308L weld filler wire. Sub-sized tensile specimens were used to ensure the entire gage section of each tensile specimen consisted of weld metal. Specimens were extracted in both axial and transverse orientations, and at three different depths within the weld (root, center, and top). Yield strength decreased and ductility increased moving from the root to the top of the weld. A subset of specimens was precharged with hydrogen at 138 MPa (20,000 psi) and 300°C prior to testing, resulting in a uniform hydrogen concentration of 7700 appm. The presence of hydrogen resulted in a slight increase in yield and tensile strength and a roughly 50% decrease in tensile elongation and reduction in area, compared to the hydrogen-free properties.
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ASME 2015 Pressure Vessels and Piping Conference
July 19–23, 2015
Boston, Massachusetts, USA
Conference Sponsors:
- Pressure Vessels and Piping Division
ISBN:
978-0-7918-5700-7
PROCEEDINGS PAPER
Effect of Hydrogen on Tensile Strength and Ductility of Multi-Pass 304L / 308L Austenitic Stainless Steel Welds
Dorian K. Balch,
Dorian K. Balch
Sandia National Laboratories, Livermore, CA
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Chris San Marchi
Chris San Marchi
Sandia National Laboratories, Livermore, CA
Search for other works by this author on:
Dorian K. Balch
Sandia National Laboratories, Livermore, CA
Chris San Marchi
Sandia National Laboratories, Livermore, CA
Paper No:
PVP2015-45591, V06BT06A019; 10 pages
Published Online:
November 19, 2015
Citation
Balch, DK, & San Marchi, C. "Effect of Hydrogen on Tensile Strength and Ductility of Multi-Pass 304L / 308L Austenitic Stainless Steel Welds." Proceedings of the ASME 2015 Pressure Vessels and Piping Conference. Volume 6B: Materials and Fabrication. Boston, Massachusetts, USA. July 19–23, 2015. V06BT06A019. ASME. https://doi.org/10.1115/PVP2015-45591
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