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gray 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.c0047297
EISBN: 978-1-62708-235-8
... Abstract Door-closer cylinder castings manufactured of class 30 gray iron were breaking during machining. The manufacturing source reported that a random sampling of castings from this lot had hardnesses from 180 to 210 HRB. Based on the color of the components, heat treatment of these castings...
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
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c0047263
EISBN: 978-1-62708-218-1
... with the exhaust-gas flow chamber. No recommendations were made. Castings Cylinder heads Porosity Shrinkage Gray iron Casting-related failures An engine cylinder head failed after operating just 3.2 km (2 miles) because of coolant leakage through the exhaust port. Investigation The left-bank...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c0089526
EISBN: 978-1-62708-218-1
.... Controlled pouring temperatures, improved design and use of chills were recommended to avoid the casting defects. Casting defects Cracking (fracturing) Cylinder heads Microporosity Shrinkage Gray iron Casting-related failures A cracked cylinder head was removed from an engine after...
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
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.pulp.c0089567
EISBN: 978-1-62708-230-3
... Abstract A paper drier head manufactured from gray cast iron was removed from service as a result of NDE detection of crack-like surface discontinuities. This component was subjected to internal steam pressure to provide heat energy for drying. Investigation (visual inspection, chemical...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001375
EISBN: 978-1-62708-215-0
... Abstract Three sprinkler system dry pipe valve castings (class 30 gray iron), two that had failed in service and one that had been rejected during machining because of porosity, were submitted for examination. The two failures consisted of cracks in a seating face. All three were from the same...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001050
EISBN: 978-1-62708-214-3
... corner in contact with the edge of the head. The material was a hardened gray cast iron containing 2.8% Ni and 1.2% Mo. Based on the results of visual, nondestructive, metallographic, and chemical analyses, it was concluded that failure occurred after corrosion fatigue cracking had weakened the shell...
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
... for the crack formation. A fourth crankcase had cracked in the bore-hole of the frontal face. In this case the cause of the fracture was the low strength of a region that was caused by a bad microstructure further weakened by the bore hole. Casting defects Cooling rate Crankcases Gray iron Casting...
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
... was promoted by the formation of undercooled microstructure of low strength in the thin-walled part. Similar damage appeared in a cylinder head, in which case, the cracks were promoted by a supercooled structure. Castings Cylinder heads Engine blocks Shrinkage Stresses Gray iron Casting-related...
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
... in consideration of the uncomplicated shape of the castings. Annealing Bearing caps Castings Stress relieving Gray iron Casting-related failures Cast iron bearing caps in tractor engines fractured repeatedly after only short operating periods. Two of the pieces were examined initially. Both showed...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006831
EISBN: 978-1-62708-329-4
... the intended function is decreased. The article addresses factors that may cause failures in castings for each metal type, starting with gray iron and progressing to ductile iron, steel, aluminum, and copper-base alloys. It describes the general root causes of failure attributed to the casting material...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003508
EISBN: 978-1-62708-180-1
... iron, gray cast iron, malleable irons, ductile iron, low-alloy steel castings, austenitic steels, corrosion-resistant castings, and cast aluminum alloys are the materials discussed. The article describes the general types of discontinuities or imperfections for traditional casting with sand molds...
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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
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Published: 01 June 2019
Fig. 1 Sand-cast gray iron flanged nut that failed by brittle fracture. (a) Flanged nut, which was used to adjust a plate-bending roll, and the flange that fractured from the body. Dimensions given in inches. (b) Micrograph of a specimen from the flange showing coarse pearlite matrix, large More
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Published: 01 June 2019
Fig. 1 Sand-cast gray iron pump bowl that failed due to graphitic corrosion and erosion. (a) Section through the pump bowl. (b) and (c) Macrographs of sections through the corroded areas in the pump shell and vane, respectively, showing graphitic residue not eroded by the action of water 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. 33 Gray-iron cylinder block that cracked due to casting stresses. (a) External view. (b) Internal view showing crack site (arrow). 0.25├Ś. Source: Ref 11 More