3 Postheat
Postheat Maximum
Quench S.A.E.
Temperature Time
Hardness Hardness
Steel (Deg.
F) (Minutes)
(Rc) (Rc)
1019 -
- 19
42 1050
600 10
48 62
1000 1
28 1335
700 10
39 59
1000 20
18 2160
600 10
48 65
1000 1
24 2260
600 25
50 64
1000 1
25 2340
600 35
46 60
1000 5
21 2512
700 5
36 42
900 75
20 3140
700 25
48 60
1000 15
21 3330
600 25
43 57
800 20
38 1100
10 hr. 23
4037 700
10 41
56 900
5 25
4130 700
10 44
56 800
5 37
4340 600
50 48
62 700
5 hr. 40
SUGGESTED
POSTHEAT TIME AND TEMPERATURE FOR TYPICAL
HARDENABLE STEELS Apply
heat immediately after weld is completed and before
it cools to below 600 deg. Continued
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