Heat Treatment of Steel Machinery's Handbook, 31st Edition
491
Table 5d. Typical Heat Treatments for SAE Alloy Steels (Heat-Treating Grades—Stainless Chromium Irons and Steels)
Sub-critical Anneal
Full Anneal
Harden
SAE No. a
Quenching Medium Temper
Normalize
Deg. F Deg. C Deg. F Deg. C Deg. F
Deg. C
… 1300–1350 b 704–732 b 1550–1650 c 843–899 c
… … Oil or air
To desired hardness To desired hardness To desired hardness To desired hardness
51410
… … … … … 1750–1850 954–1010
… 1200–1250 b 649–677 b
… … … … Oilor air
51414
… … … … … 1750–1850 954–1010
… 1300–1350 b 704–732 b 1550–1650 c 843–899 c
… … Oil or air … … Oil or air
51416 51420
… … … … … 1750–1850 954–1010
… 1350–1450 b 732–788 b 1550–1650 c 843–899 c
51420F
… … … … … 1800–1850 982–1010
51430
… 1400–1500 d 760–816 d … 1250–1500 d 677–816 d … 1150–1225 b 621–663 b
… … … … … … … … … … … … … … 1800–1900 982–1038 Oil or air
51430F
To desired hardness To desired hardness
51431
51440A 51440B 51440C 51440F
… 1350–1440 b 732–782 b 1550–1650 c 843–899 c 1850–1950 1010–1066 Oil or air
51442 51446 51501
… 1400–1500 d 760–816 d … 1500–1650 d 816–899 d
… … … … … … … … … … … …
… 1325–1375 b 718–746 b 1525–1600 c 829–871 c 1600–1700 871–927 To desired hardness a Suffixes A, B, and C denote steels differing in carbon content only. Suffix F denotes a free- machining steel. b Usually air cooled, but may be furnace cooled. c Cool slowly in furnace. d Cool rapidly in air. Table 6. Typical SAE Heat Treatments for Grades of Chromium-Nickel Austenitic Steels Not Hardenable by Thermal Treatment SAE Steels AISI No. Annealing a Temperature Quenching Medium (degrees F) (degrees C) 30201 201 1850-2050 1010-1120 Air 30202 202 1850-2050 1010-1120 Air 30301 301 1850-2050 1010-1120 Air 30302 302 1850-2050 1010-1120 Air 30303 303 1850-2050 1010-1120 Air 30304 304 1850-2050 1010-1120 Air 30305 305 1850-2050 1010-1120 Air 30309 309 1900-2050 1040-1120 Air 30310 310 1900-2100 1040-1150 Air 30316 316 1850-2050 1010-1120 Air 30317 317 1850-2050 1010-1120 Air 30321 321 1750-2050 955-1120 Air 30325 325 1800-2100 980-1150 Air 30330 … 1950-2150 1065-1175 Air 30347 347 1850-2050 1010-1120 Air Oil or air a Quench to produce full austenitic structure in accordance with the thickness of the section. Annealing temperatures given cover process and full annealing as already established and used by industry, the lower end of the range being used for process annealing. Source: SAE Handbook , 1990. Reprinted with permission. Copyright © 1990. Society of Auto motive Engineers, Inc. All rights reserved.
Copyright 2020, Industrial Press, Inc.
ebooks.industrialpress.com
Made with FlippingBook - Share PDF online