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Submerged arc welding

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Published: 30 August 2021
Fig. 32 (a) Cross section of longitudinal seam in typical double submerged arc welded pipe. (b) Cross section of longitudinal seam in the pup where the rupture initiated More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c0046911
EISBN: 978-1-62708-227-3
... thick ASTM A285, grade B, steel plate. One joint was welded using the semiautomatic submerged arc process with one pass on each side. A second joint was welded manually by the shielded metal arc process using E6010 welding rod and four passes on each side. The silicon content of the shielded metal arc...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001017
EISBN: 978-1-62708-219-8
... Abstract A 10-in. diam, spiral-welded AISI 1020 carbon steel pipe carrying water under pressure developed numerous leaks over a four mile section. The section was fabricated using submerged-arc welding from the outside surface. Each welded length of pipe had been subjected to a proof pressure...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c9001523
EISBN: 978-1-62708-227-3
... Abstract In TAKR 300 (Bob Hope) Class transport ships, the builder observed cracking of steel cloverleaf vehicle tie-down deck sockets following installation. Sockets were made from AH36 steel plate by flame cutting and cold coining, then submerged-arc welded to the shop deck. Cracks initiated...
Image
Published: 01 June 2019
Fig. 1 Microstructures of weld metals in T joints of ASTM A285, grade B, steel. (a) Submerged arc weld in a galvanizing vat that failed by molten-zinc corrosion along elongated ferrite bands such as those shown. Etched with 2% nital. 100x. (b) Multiple-pass manual shielded metal arc weld More
Image
Published: 30 August 2021
Fig. 12 Photograph of ruptured section of 76 cm (30 in.) diameter double-submerged arc welded pipe. The arrow indicates the fracture-origin region. More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0048846
EISBN: 978-1-62708-234-1
... within specifications or reasonable for the materials of construction after service The failed weld and three others had an unusually high manganese content that identified them as having been fabricated by the submerged arc process. Three other welds were low in manganese, identifying them as having...
Image
Published: 30 August 2021
Fig. 16 Cross sections of A.O. Smith submerged metal arc seam welds. OD, outer diameter More
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001820
EISBN: 978-1-62708-180-1
... failures Defects in the pipe body Mechanical damage Fatigue cracks Material defects Longitudinal weld defects Submerged arc welds Weld-area cracks Incomplete fusion Porosity Slag inclusions Inclusions at skelp edge Off seam Repair welds Incomplete...
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
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 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 Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0006548
EISBN: 978-1-62708-180-1
... submerged arc welding SC carbon saturation SCC stress-corrosion cracking SCE standard calomel electrode SCF stress concentration factor SE secondary electrons SEM scanning electron microscopy; second- ary electron microscopy SFRP short fiber reinforced polymer compos- ite S-L short transverse-longitudinal...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006822
EISBN: 978-1-62708-329-4
... Electric resistance weld flaws Flash weld flaws Furnace butt weld flaws Hook cracks Cold welds Incomplete fusion Stitching Inclusions Shielded metal arc welding flaws Gas metal arc welding flaws Submerged arc welding flaws Misalignment Porosity Incomplete fusion Incomplete...
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
... of the longitudinal seam weld as contained in boat sample 12. This section reveals evidence of surface macrocracking in two of the bead columns, roughly following the centerline zones of the beads. A similar cracking pattern has been reported for a circumferential submerged arc weld in a main steam line [ 3 ]. Boat...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0089793
EISBN: 978-1-62708-235-8
... on the outside wall at point B. The weld was deposited using a single-head submerged arc process, and the failure occurred when 32 mm (1.25 in.) of weld depth had been laid. Sections through the failure revealed that the cracking had initiated at the root of the weld at the intersection of the plate and backing...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006808
EISBN: 978-1-62708-329-4
... of arc welds. Mechanical and environmental failure origins related to other types of welding processes are also described. The article explains the cause and effects of process-related discontinuities including weld porosity, inclusions, incomplete fusion, and incomplete penetration. Different fitness...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003509
EISBN: 978-1-62708-180-1
... imperfections may be tolerable and how the other may be root-cause defects in service failures. The article explains the effects of joint design on weldment integrity. It outlines the origins of failure associated with the inherent discontinuity of welds and the imperfections that might be introduced from arc...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001818
EISBN: 978-1-62708-180-1
.... 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 same welding procedures except that localized heating...
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
... 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 same...