NDLI: Effectiveness of Stainless Steel Buffer Layer to Address Hot Cracking During Weld Overlay Repair of Dissimilar Metal Alloy 82/182 Welds With Stainless Steel Piping

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Nathaniel, G. Cofie Richard, E. Smith Richard, L. Bax Christopher, S. Lohse Hermanns, Bill Valsvig, Jerry Luis, D. Yepez Parker, Dixon
Copyright Year	2008
Abstract	Many pressurized water reactor (PWR) plants have used weld overlays to mitigate the pressurizer dissimilar metal welds that are susceptible to primary water stress corrosion cracking (PWSCC). These configurations typically consist of SA-508 Class 2 low alloy steel welded to a stainless steel safe end by Alloy 82/182 weld metal. The overlay weld metal is typically Alloy 52M. In a few cases, solidification cracking (hot cracking) has been observed on the stainless steel portion of the configuration when the first weld overlay layer is deposited. To overcome this problem, a process consisting of deposition of ER308L or ER309L stainless steel buffer layer for the first layer in conjunction with a low Power Ratio welding procedure has been developed and applied successfully. The Alloy 52M weld overlay is then deposited after the buffer layer. This paper discusses the causes of the hot cracking and test programs to develop the parameters for the welding of the buffer layer and subsequent weld overlay layers. In addition the results of analysis performed to determine the impact of the buffer layer on the post weld overlay residual stresses are also discussed.
Sponsorship	Pressure Vessels and Piping
Starting Page	43
Ending Page	52
Page Count	10
File Format	PDF
ISBN	9780791848241
DOI	10.1115/PVP2008-61411
e-ISBN	0791838285
Volume Number	Volume 1: Codes and Standards
Conference Proceedings	ASME 2008 Pressure Vessels and Piping Conference
Language	English
Publisher Date	2008-07-27
Publisher Place	Chicago, Illinois, USA
Access Restriction	Subscribed
Subject Keyword	Overlays (materials engineering) Water Cracking (materials) Welding Metals Alloys Maintenance Polishing equipment Residual stresses Stress corrosion cracking Solidification Alloy steel Fracture (process) Welded joints Stainless steel Pipes Pressurized water reactors
Content Type	Text
Resource Type	Article

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