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cast iron castings

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001197
EISBN: 978-1-62708-235-8
... Abstract The front wall of a cast iron crankcase cracked at the transition from the comparatively minor wall thickness to the thick bosses for the drilling of the bolt holes. Metallographic examination showed the case was aggravated by the fact that the casting had a ferritic basic structure...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001226
EISBN: 978-1-62708-234-1
..., 2.49Si, 0.51Mn, 0.485P, and 0.112S. The iron was thus distinctly hypereutectic. The galling of the pump parts therefore was favored by an unsuitable structure caused by improper composition and fast cooling. Distortion by casting stresses may have been contributory or may have played the principal part...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c9001198
EISBN: 978-1-62708-221-1
... Abstract Cast iron bearing caps in tractor engines fractured repeatedly after only short operating periods. The fracture originated in a cast-in groove and ran approximately radially to the shaft axis. The smallest cross section was at the point of fracture. The core structure of the caps...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c9001200
EISBN: 978-1-62708-221-1
... Abstract During the operation of tractors with cantilevered body, the lateral wall of the hypoeutectic cast iron cylinder blocks cracked repeatedly. Three of the blocks were examined. The grain structure of the thick-walled part consisted of uniformly distributed graphite of medium flake size...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c0091384
EISBN: 978-1-62708-219-8
... Abstract A 25.4 cm (10 in.) diam gray cast iron water main pipe was buried in the soil beneath a concrete slab. The installation was believed to have been completed in the early 20th century. A leak from the pipe resulted in flooding of a warehouse. Once removed, the pipe revealed through-wall...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c0089617
EISBN: 978-1-62708-232-7
... Abstract A forged 4130 steel cylindrical permanent mold, used for centrifugal casting of gray- and ductile-iron pipe, was examined after pulling of the pipe became increasingly difficult. In operation, the mold rotated at a predetermined speed in a centrifugal casting machine while the molten...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001071
EISBN: 978-1-62708-214-3
... Abstract A gray cast iron (ASTM 247 type A) gate valve in an oleum and sulfuric acid piping loop at a chemical process plant fractured catastrophically after approximately 10 years of service. The valve was a 150 mm (6 in.) bolted flange type rated to conform to ANSI B16.1 for service at 1034...
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Published: 01 January 2002
Fig. 58 As-cast gray cast iron loaded in tension. It is common to find little or no macroscale information visible on the fracture surface of many casting alloys to indicate the fracture origin and direction of crack propagation. There are exceptions to this, including the nodular irons More
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Published: 15 January 2021
Fig. 58 As-cast gray cast iron loaded in tension. It is common to find little or no macroscale information visible on the fracture surface of many casting alloys to indicate the fracture origin and direction of crack propagation. Exceptions to this include nodular irons and some aluminum More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.pulp.c0048804
EISBN: 978-1-62708-230-3
... Abstract Several cases of failures in gray cast iron paper machine dryer rolls were evaluated. The rolls were found have ground outer cylindrical surfaces on which the paper web is dried. They were found to rotate about their longitudinal axes at speeds from 50 to 250 rpm while containing...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001307
EISBN: 978-1-62708-215-0
... Abstract The right front spring hanger on a dual rear axle of the tractor of a tractor-trailer combination failed, causing the vehicle to roll-over. The hanger was made from malleable cast iron that had been heat treated to produce a decarburized surface layer and a pearlitic transition layer...
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Published: 01 January 2002
Fig. 8 Scanning electron micrograph of ductile cast iron graphite nodules and ferritic phase after corrosion tests. Note the loss of material at the interface of the nodule. 2000×. Source: Ref 11 , 12 More
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Published: 01 January 2002
Fig. 41 Graphitic corrosion of a gray cast iron sewer pipe section removed from the mud bottom of a seawater bay. Graphitic corrosion on the outside diameter surface is apparent for approximately 25% of the wall thickness. Courtesy of S.R. Freeman, Millennium Metallurgy, Ltd. More
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Published: 01 January 2002
Fig. 42 A 25 cm (10 in.) diam gray cast iron pipe that failed due to graphitic corrosion. The pipe was part of a water supply to a fire protection system. The external surface was covered with soil and the inside surface in contact with water. The pipe had been experienced cracking and through More
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Published: 01 January 2002
Fig. 6 Photographs of a damaged cast iron pump impeller. (a) Breaks in the back wall of impeller 1 and cavitation pits on the front wall. (b) Cracks following the shape of the blades on the back wall of impeller 2. Both 0.7×. Source: Ref 11 More
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Published: 01 January 2002
Fig. 33 Gray-iron cylinder block that cracked due to casting stresses. (a) External view. (b) Internal view showing crack site (arrow). 0.25×. Source: Ref 11 More
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Published: 01 January 2002
Fig. 40 Stuffing box sand cast from ASTM A 536, grade 60-45-10, ductile iron. (a) Configuration and dimensions (given in inches). (b) Micrograph showing the structure consisting of graphite nodules in a ferritic matrix with remnants of a pearlite network. Etched with nital. 100× More
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Published: 01 January 2002
Fig. 49 Piston for a gun-recoil mechanism, sand cast from ductile iron conforming to MIL-I-11466, grade D7003, that fractured in fatigue because of vermicularity of graphite. (a) and (b) Two different views of the piston showing fractures; A and B indicate orifices (see text). Approximately More
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Published: 01 January 2002
Fig. 12 Cast iron suction bell, 455 mm (18 in.) in diameter, from a low-pressure general service water pump that failed by cavitation erosion after about 5 years of service. Note the deeply pitted surface and the irregular shape of the erosion pattern, both of which are typical characteristics More
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Published: 01 January 2002
Fig. 34 Cast iron suction bell, 455 mm (18 in.) in diameter, from a low-pressure general service water pump that failed by cavitation erosion after about 5 years of service. Note the deeply pitted surface and the irregular shape of the erosion pattern, both of which are typical characteristics More