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Image
Published: 01 December 1984
Figure 6-2 Comparison of the effective case depth of a nitrided AISI 4150 alloy steel assessed by visual estimation and by microhardness (100-g) traverses (110 ×, nital). Note the heavy “white” layer at the surface. More
Image
Published: 01 September 2008
Fig. 99 Jominy curves for end-quenched bars of (a) AISI 1050, (b) 4150, and (c) 4340 steels, austenitized conventionally and by short-time induction heating. Source: Ref 40 , 41 More
Image
Published: 01 August 2015
Fig. A5.4 Tempering curve for 4150 steel. Tempered 1 h at heat; as quenched, 62 HRC at 120 °C (250 °F). Source: Ref 1 More
Image
Published: 01 March 2012
Fig. 15.31 Upper bainite (dark rectangular areas) in 4150 steel transformed at 460 °C (860 °F). Original magnification: 500×. Courtesy of Florence Jacobs, Colorado School of Mines. Source: Ref 15.19 More
Image
Published: 01 January 2015
Fig. 6.6 Upper bainite (dark rectangular areas) in 4150 steel transformed at 460 °C (860 °F). Light micrograph, nital etch, original magnification 500×. Courtesy of Florence Jacobs, Colorado School of Mines More
Image
Published: 01 January 2015
Fig. 16.31 Jominy end-quench curves for 4130 (top), 4140 (middle), and 4150 (bottom) steels each with low (0.002 %) and high (0.018 %) levels of phosphorus. Source: Ref 16.49 More
Image
Published: 01 November 2012
Fig. 11 Dual dimple size observed in a 4150 steel. Material was isothermally transformed at 190 °C (375 °F) and was not tempered. Tested as a Charpy V-notch specimen at 0 °C (30 °F). Source: Ref 4 More
Image
Published: 31 December 2020
Fig. 19 Light micrograph showing patches of (a) upper bainite formed in 4150 steel partially transformed at 460 °C (860 °F) and (b) lower bainite (dark plates) in 4150 steel (nital etch). More
Image
Published: 01 January 1998
Fig. 5-18 Pearlitic microstructures in 52100 steel (a) and 4150 steel (b). In the 52100 steel the roughly parallel lamellae of pearlite are resolved, but in the 4150 steel the interlamellar spacing is too fine to be resolved in the light microscope. Light micrographs. Courtesy of K. Hayes More
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050343
EISBN: 978-1-62708-311-9
... Abstract This appendix provides tempering curves for common grades of steel, including 1045, 1144, 4140, 4150, and E52100. hardness steel temperature tempering curves Fig. A5.1 Tempering curve for 1045 steel. Tempered 1 h at heat; as quenched, 60 HRC at 120 °C (250 °F). Source...
Image
Published: 01 September 2008
Fig. 100 Effect of (a) time at an 870 °C austenitizing temperature and (b) maximum surface temperature on the Jominy curves for induction-hardened AISI 4150 steel. The curve for conventional furnace-heated 4150 is also shown in (b). Source: Ref 40 , 41 More
Image
Published: 01 January 2015
Fig. 18.18 Photograph of necking and fracture of tensile specimens of martensitic 41xx steels tempered at 150 °C (300 °F). From left to right: 4130, 4140, 4150 More
Image
Published: 01 January 2015
Fig. 18.19 Central and near-surface shear fracture areas of martenstic of 41xx steel tensile specimens tempered at 150 °C (300 °F). (a) 4130. (b) 4140. (c) 4150. SEM micrographs More
Image
Published: 01 January 2015
Fig. 18.20 Fracture surface topographies from central fracture regions of martensitic 41xx steel tensile specimens tempered at 150 °C (300 °F). (a) 4130. (b) 4140. (c) 4150. SEM micrographs More
Image
Published: 01 January 2015
Fig. 18.21 Fracture surface topologies of near-surface shear regions of martensitic 41xx steel tensile specimens tempered at 150 °C (300 °F). (a) 4130. (b) 4140. (c) 4150. SEM micrographs More
Image
Published: 01 January 1998
Fig. 5-19 Upper bainite colonies, which appear as dark-etching rectangular areas, in a 4150 steel. Each colony is composed of many parallel lathlike crystals of ferrite with cementite particles between the ferrite laths. Light micrograph. Courtesy of F.A. Jacobs More
Image
Published: 01 January 2015
Fig. 18.13 (a) Interlath retained austenite (white diagonal bands) and transition carbides in 4130 steel tempered at 150 °C (300 °F). (b) Dense transition carbide precipitation in a martensite lath in 4150 steel tempered at 150 °C. Dark-field transmission electron micrographs. Courtesy More
Image
Published: 01 August 2015
at the radius. 3% nital. 100×. (c) SAE 4150 steel as quenched and tempered; cracking initiates from silicate and sulfide inclusions. 2% nital. 100×. (d) SAE 4140 steel as quenched and tempered; microstructure is tempered martensite with cracking at inclusions. Unetched. 100×. More
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410099
EISBN: 978-1-62708-265-5
... across austenite grains, producing a blocky appearance. Figure 6.6 shows the latter characteristic of upper bainite in a 4150 steel transformed at 460 °C (860 °F). Fig. 6.6 Upper bainite (dark rectangular areas) in 4150 steel transformed at 460 °C (860 °F). Light micrograph, nital etch, original...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410405
EISBN: 978-1-62708-265-5
... of 4130 and 4150 steels quenched to martensite and tempered at 150 °C. Retained austenite does not transform during heating to temperatures below 200 °C, and therefore is a small but important LTT microstructural component of hardened low- and medium-carbon steels. The retained austenite is present...