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Submerged arc welding

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Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001088
EISBN: 978-1-62708-214-3
... Abstract A 25 mm (1 in.) diam carrier shaft failed suddenly during operation. The shaft failed near the toe of the 4.8 mm (316 in.) frame-to-shaft 60 deg and 120 deg submerged metal arc (SMA) tack welds after an unknown time in service. Material specifications called for the shaft to be made...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0048814
EISBN: 978-1-62708-229-7
... Abstract A nuclear steam-generator vessel constructed of 100-mm thick SA302, grade B, steel was found to have a small leak. The leak originated in the circumferential closure weld joining the transition cone to the upper shell. The welds had been fabricated from the outside by the submerged arc...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001669
EISBN: 978-1-62708-229-7
... cracking pattern has been reported for a circumferential submerged arc weld in a main steam line [ 3 ]. Boat sample 11 also was cut from an area beyond the visible cracking where UT had indicated there was subsurface cracking. As shown in Figure 4 , cracking was evident in the weld beads directly below...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c0048795
EISBN: 978-1-62708-220-4
... cooled in still air for examination of the seams. Circumferential welding was done by the submerged arc process, using preheating at 200 °C (390 °F). Each subassembly was stress relieved by being heated to 620 to 660 °C (1150 to 1220 °F) for 6 h. Final joining of the three subassemblies followed the...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.9781627081801
EISBN: 978-1-62708-180-1
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006784
EISBN: 978-1-62708-295-2
..., such as martensite. Hydrogen can be transferred to the molten weld pool from the arc atmosphere. Sources of hydrogen include the shielding gas, flux, wet rods, or surface contamination. As the weld metal cools, it becomes supersaturated with hydrogen, which diffuses into the HAZ, which is in a state of...