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Book Chapter
Series: ASM Handbook
Volume: 1
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v01.a0009237
EISBN: 978-1-62708-161-0
... on hardenability. It explains the significance of H-steels, and how they are guaranteed to meet established hardenability limits for specific temperatures and chemical compositions. The article compares hardenability curves for six series of steel and includes several charts showing composition and H-band limits...
Abstract
Hardenability is an expression of the propensity of steel to harden when quenched at the austenitizing temperature. It is defined in terms of the depth and distribution of alloying elements present in the steel. This article describes the selection process for steel with an emphasis on hardenability. It explains the significance of H-steels, and how they are guaranteed to meet established hardenability limits for specific temperatures and chemical compositions. The article compares hardenability curves for six series of steel and includes several charts showing composition and H-band limits for various alloy grades.
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Published: 01 August 2013
Fig. 52 Examples of hardenability bands of H-steels compared to the wider bands for similar steels made to chemical specification only
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Published: 01 October 2014
Fig. 18 Hardenability bands of carbon H steels: (a) 1038H, (b) 1045H, (c) 1541H, and (d) boron steel 5B41. All with recommended heat treating as follows: normalize (for forged or rolled specimens only) at 870 °C (1600 °F); austenitize: 845 °C (1550 °F)
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Published: 01 October 2014
Fig. 21 Hardenability limits of 1038H compared with various alloy H-steels with comparable carbon content: (a) minimum limit, (b) maximum limit
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Published: 01 October 2014
Fig. 22 Hardenability limits of 1045H compared with various alloy H-steels with comparable carbon content: (a) minimum limit, (b) maximum limit
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Published: 01 October 2014
Fig. 3 Hardenability limits of various low-alloy H-steels with nominal 0.40% C content. (a) Minimum hardness limits plotted (top) and tabulated (bottom). (b) Maximum hardness limits plotted (top) and tabulated (bottom)
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Published: 01 October 2014
Fig. 12 Effect of alloying on minimum end-quench hardenability of 40 xx H steels. (a) Effect of carbon content (indicated by suffix of 40 xx H steel). (b) Effect of molybdenum
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Published: 01 October 2014
Fig. 36 Effect of carbon content on hardenability of chromium alloy H-steels. (a) The minimum end-quench hardenability with number adjacent to each curve indicates the carbon content of the steel. (b) Effect of carbon on minimum hardenability for hardness of 45 HRC at one-half radius of scale
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Published: 01 February 2024
Fig. 24 Effect of alloying on minimum end-quench hardenability of 40 xx H steels. (a) Effect of carbon content (indicated by suffix of 40 xx H steel). (b) Effect of molybdenum
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in Corrosion in Petroleum Refining and Petrochemical Operations
> Corrosion: Environments and Industries
Published: 01 January 2006
Fig. 25 Weight gain of carbon, low-alloy, and stainless steels in air after 1000 h at temperatures from 590 to 930 °C (1100 to 1700 °F)
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in Corrosion in Supercritical Water—Ultrasupercritical Environments for Power Production
> Corrosion: Environments and Industries
Published: 01 January 2006
Fig. 7 The evolution of austenitic steels for boilers. {#} indicates 10 5 h creep-rupture strength at 600 °C, 2 Mpa. Source: Ref 7 , 10
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Published: 01 January 2006
Fig. 9 Corrosion loss of stainless steels after 2000 h exposure in the Prenflo demonstration plant. Alloy 28 (UNS N08028), HR 160 (UNS N12160)
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Published: 01 January 1996
Fig. 7 Factors affecting fatigue properties of stainless steels. Source: Metals Handbook , 8th ed., Vol 1
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Published: 01 December 2004
Fig. 74 Microstructure (picral etch, 500×) of AISI S7 tool steels with isothermal heat treatments. (a) Held at 704 °C (1300 °F) for 30 min (only a small amount of transformation before quenching). (b) Held at 704 °C (1300 °F) for 4 h (almost complete transformation to pearlite)
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Published: 01 January 1990
Fig. 17 Corrosion rates of various stainless steels in underaerated H 2 SO 4 at 20 °C (70 °F). Source: Ref 44
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in Elevated-Temperature Properties of Stainless Steels
> Properties and Selection: Irons, Steels, and High-Performance Alloys
Published: 01 January 1990
Fig. 4 Creep rate curves for several annealed H-grade austenitic stainless steels. (a) 1% creep in 100,000 h. (b) 1% creep in 10,000 h. Source: Ref 1
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in Elevated-Temperature Properties of Stainless Steels
> Properties and Selection: Irons, Steels, and High-Performance Alloys
Published: 01 January 1990
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in Elevated-Temperature Properties of Stainless Steels
> Properties and Selection: Irons, Steels, and High-Performance Alloys
Published: 01 January 1990
Fig. 16 100,000-h creep-rupture strength of various steels used in boiler tubes. TB12 steel has as much as five times the 100,000-h creep-rupture strength of conventional ferritic steels at 600 °C (1110 °F). This allows an increase in boiler tube operating temperature of 120 to 130 °C (215
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in Wrought and P/M Superalloys
> Properties and Selection: Irons, Steels, and High-Performance Alloys
Published: 01 January 1990
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in Heat Treating of Cold-Work Tool Steels—Low- and Un-Alloyed Water and Oil Hardening Steels
> Heat Treating of Irons and Steels
Published: 01 October 2014
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