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mottled cast iron

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Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.tb.msisep.t59220583
EISBN: 978-1-62708-259-4
..., and nonmetallic inclusions. Etchant: picral. Fig. 17.52 Gray cast iron. Graphite and steadite in a ferritic matrix. Etchant: picral. Fig. 17.53 Chilled cast iron. Mottled region. Partially spheroidized pearlite, cementite, and phosphorus-rich eutectic. The region presenting a dotted feature...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.pht2.t51440207
EISBN: 978-1-62708-262-4
... formation of metal carbide and flake graphite (mottled cast irons). Mottled cast irons are simply a mixture of white and gray cast iron. The number of different irons that can exist is consequently almost infinite. For the two general types of iron that are emphasized in this chapter—gray and ductile...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.mgppis.t60400023
EISBN: 978-1-62708-258-7
...× Fig. 2.50 Mottled pearlitic cast iron. Gray iron at upper left and white iron at lower right of photo. 4% picral etch. 250× Fig. 2.51 Pearlitic ductile (nodular) cast iron (2.95% C, 0.36% Mn, 2.75% Si, and 0.09% Mg). Dark, rounded particles are graphite. 4% picral etch. 500× Fig...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2001
DOI: 10.31399/asm.tb.aub.t61170100
EISBN: 978-1-62708-297-6
... for the as-cast iron to be mottled instead of white. 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 in Table 1...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.mgppis.t60400001
EISBN: 978-1-62708-258-7
... consisting of ferrite. Etched in 2% nital. 200× Fig. 1.27 Micrograph of a mottled cast iron showing a microstructure consisting of pearlite (dark gray etching constituent), cementite (light etching constituent), ledeburite (clusters of small, rounded pearlite particles), and graphite flakes (dark...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2022
DOI: 10.31399/asm.tb.isceg.9781627083324
EISBN: 978-1-62708-332-4
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060247
EISBN: 978-1-62708-261-7
... the initial solidification point (liquidus), but it also is a factor in whether an iron solidifies with a gray, white, or mottled eutectic. Silicon lowers the eutectic and eutectoid levels of carbon in iron. In the range of 1 to 3% Si levels normally found in cast irons, eutectic carbon levels are related...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.smnm.t52140175
EISBN: 978-1-62708-264-8
..., there is a mixture of white and gray; such regions are referred to as mottled. Fig. 16.3 Chill casting showing white, gray, and mottled areas As the silicon content of the cast iron increases, the chill depth decreases. By adding certain chemical elements, called inoculants, to the liquid iron ladle...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2022
DOI: 10.31399/asm.tb.isceg.t59320031
EISBN: 978-1-62708-332-4
...Abstract Abstract This chapter discusses the crystal structures of steel and cast iron, the iron-iron carbide equilibrium diagram, microconstituents or phases in the iron-iron carbide phase diagram, the iron-carbon carbide-silicon equilibrium diagram of cast irons, and the influence...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240453
EISBN: 978-1-62708-251-8
... or mottled iron to form on solidification. In hypereutectic irons (CE greater than approximately 4.3%), there is a tendency for kish graphite (proeutectic graphite that forms and floats free in the molten iron) to precipitate on solidification under normal cooling conditions. The strengths of cast irons...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2022
DOI: 10.31399/asm.tb.isceg.t59320157
EISBN: 978-1-62708-332-4
... guidelines for malleable iron castings. composition iron castings malleabilization malleable iron tensile strength yield strength THE DEVELOPMENT OF MALLEABLE IRON in 1720 was a unique innovation because this new type of iron was strong, tough, machinable, and malleable for piercing...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2001
DOI: 10.31399/asm.tb.aub.t61170107
EISBN: 978-1-62708-297-6
... alloy grades and applications. abrasion resistance high-alloy white iron Composition Introduction and Overview Effects of Alloying Elements and Inoculants Selected References Selected References • Metallurgy and Properties of High-Alloy White Irons , ASM Specialty Handbook: Cast...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.tb.msisep.t59220039
EISBN: 978-1-62708-259-4
... structure and sometimes qualitatively evaluating the extent of segregation. Among cast irons, normally chilled irons and mottled irons are the only ones subjected to macrographic evaluation. In mottled irons one can evaluate the size and distribution of the graphite nuclei, whereas in chilled irons...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2001
DOI: 10.31399/asm.tb.aub.9781627082976
EISBN: 978-1-62708-297-6
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.lmcs.t66560039
EISBN: 978-1-62708-291-4
... Fig. 4.1 (Part 1) High-purity irons. (a) to (d) NPL-BISRA high-purity hot-rolled iron bar. 0.0026C-0.003Si-0.004Mn-0.0016O-0.0018N (wt%). (a) 76 HV. 1% nital. 100×. (b) 76 HV. Picral. 2000×. (c) 76 HV. 3% nital. 250×. (d) Annealed from 925 °C. 72 HV. Picral. 2000×. (e) to (h...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2022
DOI: 10.31399/asm.tb.isceg.t59320063
EISBN: 978-1-62708-332-4
... in rolling operations. A layer of mottled iron follows the chilled skin layer. The central core is of gray iron with nearly 95% pearlite. (The process, chemistry, and applications of rolling mill rolls are detailed in Chapter 7 , “ Engineering of Gray Iron Castings ,” in this book.) 6.7 Minimum Wall...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2012
DOI: 10.31399/asm.tb.pdub.t53420117
EISBN: 978-1-62708-310-2
.... Trans. , Vol 3 , 1972 , p 2989 – 2997 10.1007/BF02652872 6.10 Fredriksson H. , Solidification of Peritectics , Casting , Vol 15 , ASM Handbook , ASM International , 1988 , p 125 – 129 6.11 Frederiksson H. , The Mechanism of the Peritectic Reaction in Iron-Base Alloys...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1996
DOI: 10.31399/asm.tb.phtpclas.t64560205
EISBN: 978-1-62708-353-9
..., or oil. For oil quenching, 1095 steel may alternatively be austenitized in the range 815 to 870°C (1500 to 1600°F). (c) This range Is recommended for steel that is to be water quenched. For oil quenching, steel should be austenitized in the range 815 to 870°C (1500 to 1600°F) Fig. 6-32 Iron...
Series: ASM Technical Books
Publisher: ASM International
Published: 31 December 2020
DOI: 10.31399/asm.tb.phtbp.t59310331
EISBN: 978-1-62708-326-3
...Recommended practices for annealing gray iron castings Table 3 Recommended practices for annealing gray iron castings Type of anneal Purpose Temperature (a) Time Cooling rate (b) °C °F Low-temperature (ferritizing) For conversion of pearlite to ferrite in unalloyed irons...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.lmcs.t66560081
EISBN: 978-1-62708-291-4
...% pearlite. Picral. 100×. (d) 0.3% C semikilled, ordinary grade (0.30C-0.04Si-1.03Mn, wt%). As-rolled: center of 50 mm thick plate. 35 vol% pearlite. Picral. 1500×. Fig. 5.3 (Part 1) Fully killed continuous cast mild steel (0.15% C). (a) 0.15C-0.15Si-0.8Mn-0.02S-<0.01P (wt%). Hot-rolled bar...