Table 7. Typical SAE Heat Treatments for Stainless Chromium Steels
Subcritical Annealing Temperature
Full Annealing a Temperature
Hardening Temperature (degrees F)
SAE Steels
AISI No.
Normalizing Temperature
Quenching Medium
degrees F
degrees C degrees F degrees C degrees F
degrees C
Temper
51409 51410 51414 51416 51420
…
…
…
…
1625
885
…
…
Air
…
705–730 b 650–675 b 705–730 c 730–790 b 730–790 b 760–815 c 675–760 c 620–665 b
1500–1650
845–900
1700–1850
925–1010 980–1040 925–1010 980–1040 980–1040
410 414 416 420
1300–1350 b
Oil or air Oil or air Oil or air Oil or air Oil or air
To desired hardness To desired hardness To desired hardness To desired hardness To desired hardness
…
… 1800–1900
… 1200–1250 b … 1300–1350 c … 1350–1450 b … 1350–1450 b … 1400–1500 c … 1250–1400 c … 1150–1225 b
1500–1650 1550–1650 1550–1650
845–900 845–900 845–900
1700–1850 1800–1900 1800–1900
51420F d
…
… … …
… …
… …
… …
… …
… …
51430
430
…
51430F d
… 1800–1950
980–1065
Oil or air
To desired hardness
51431 51434 51436
431
… …
760–870 c
…
…
…
…
…
…
… 1400–1600 c
51440A d 51440B d 51440C d 51440F d
440A d 440B d 440C d
… 1350–1440 b
730–780 b
1550–1650
845–900
1850–1950 1010–1065
Oil or air
To desired hardness
…
730–815 c 790–870 b 720–745 c
… …
… …
… …
… …
… …
… …
51442 51446 51501
442 446 501
… 1350–1500 c … 1450–1600 b … 1325–1375 c
1525–1600
829–871
1600–1700
871–927
Oil or air
To desired hardness
a Cool slowly in furnace. b Usually air cooled but may be furnace cooled. c Cool rapidly in air. d Suffixes A, B, and C denote three types of steel differing only in carbon content. Suffix F denotes a free-machining steel. Source: SAE Handbook , 1990. Reprinted with permission. Copyright © 1990. Society of Automotive Engineers, Inc. All rights reserved.
Made with FlippingBook - Share PDF online