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mottled cast iron

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Published: 01 December 1998
Fig. 6 Mottled cast iron etched using 4% picral. The white phase is eutectic carbide. 50× More
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Published: 01 December 1998
Fig. 1 Fracture surface of as-cast chilled iron. White, mottled, and gray portions are shown at full size, from top to bottom. More
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Published: 01 January 1990
Fig. 1 Fracture surface of as-cast chilled iron. White, mottled, and gray portions are shown at full size, top to bottom. More
Image
Published: 01 December 2004
Si + 1 3 P is the coefficient of saturation (carbon equivalent). Region I is white cast iron (pearlite, cementite, no graphite); Region IIa is mottled cast iron (pearlite, graphite, cementite); Region IIb is ferritic-pearlitic cast iron; Region III is ferritic cast iron. Source: Ref 13 More
Series: ASM Handbook
Volume: 1
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v01.a0009206
EISBN: 978-1-62708-161-0
... Abstract This article discusses the classification schemes for cast irons and describes the characteristics of major categories, including gray iron, white iron, ductile iron, compacted graphite iron, mottled iron, malleable iron, and austempered ductile iron. It also discusses some...
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Published: 31 August 2017
Fig. 14 Interpretation of cooling curves to predict stable or metastable solidification in cast iron. (a) Gray iron. (b) Mottled iron. (c) White iron. Source: Ref 9 More
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Published: 01 December 2008
Fig. 3 The effect of section size and chill rate is evident in the wedge-shaped test casting. At the tip (left), rapid cooling results in white iron. A mottled section is adjacent, and a gray fracture surface occurs on the right where cooling was slower. Courtesy of C.R. Loper, Jr., University More
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003106
EISBN: 978-1-62708-199-3
... Abstract Cast irons primarily are iron alloys that contain more than 2% carbon and from 1 to 3% silicon. This article provides a description of iron-iron carbide-silicon system; and discusses the classification, composition, and characteristics of cast irons, such as gray, ductile, malleable...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006347
EISBN: 978-1-62708-179-5
... in an unacceptable tendency for the as-cast iron to be mottled instead of white. Composition Because of the two metallurgical requirements described previously, malleable irons involve a limited range of chemical composition and the restricted use of alloys. The chemical composition of malleable iron...
Book Chapter

Series: ASM Handbook
Volume: 1
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v01.a0001005
EISBN: 978-1-62708-161-0
... for the as-cast iron to be mottled instead of white. Composition Because of the two metallurgical requirements described above, malleable irons involve a limited range of chemical composition and the restricted use of alloys. The chemical composition of malleable iron generally conforms to the ranges given...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005326
EISBN: 978-1-62708-187-0
... and second-stage annealing reactions. A mixture of gray iron and white iron in variable proportions that produces a mottled (speckled) appearance is particularly degrading to the mechanical properties of the annealed casting, whether ferritic or pearlitic malleable iron. Primary control of mottle...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006333
EISBN: 978-1-62708-179-5
... a certain point may result in an unacceptable tendency for the as-cast iron to be mottled instead of white. The common elements in malleable iron are generally controlled within approximately ±0.05 to ±0.1%, using emission spectrometers. Thermal analysis is used for controlling the white solidification...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003110
EISBN: 978-1-62708-199-3
... beyond a certain point may result in an unacceptable tendency for the as-cast iron to be mottled instead of white. Composition Because of the two metallurgical requirements described above, malleable irons involve a limited range of chemical composition and the restricted use of alloys...
Image
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: 30 August 2021
Fig. 27 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). Original More
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003725
EISBN: 978-1-62708-177-1
...) eutectic. The iron solidifying with an austenite-graphite eutectic has a gray fracture, while the one solidifying with austenite-Fe 3 C eutectic exhibits a white fracture. Sometimes a mixed structure gray + white, termed mottled, may occur. Cast iron is a multicomponent alloy, with the main elements being...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003174
EISBN: 978-1-62708-199-3
...” structure ( Fig. 6 ) is formed. Fig. 5 Standard W2 wedge block used for measuring depth of chill (ASTM A 367). Dimensions are given in inches. Fig. 6 Mottled cast iron etched using 4% picral. The white phase is eutectic carbide. 50× Matrix Phases The steel matrix consists...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003111
EISBN: 978-1-62708-199-3
.... In the production of chilled iron, the composition is selected so that only the surfaces cast against the chill will be free from graphitic carbon ( Fig. 1 ). The more slowly cooled portions of the casting will be gray or mottled iron. The depth and hardness of the chilled portion can be controlled by adjusting...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003107
EISBN: 978-1-62708-199-3
... used for all gray irons from classes 20 to 60, ASTM A 48 provides a series of bar sizes, and the user can select the bar sizes that best approximates the cooling rate in the critical section of the casting. fatigue limit gray iron mechanical properties microstructure section sensitivity test...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006299
EISBN: 978-1-62708-179-5
... Interpretation of cooling curves to predict stable or metastable solidification in cast iron. (a) Gray iron. (b) Mottled iron. (c) White iron. Source: Ref 9 Cooling Curves and Graphite Shape In addition to the effect on melting point and the number of growing cells or crystals, cooling curves also...