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Heat Treating Tool Steels Manufacturing Table Chart
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Heat Treating Tool Steels Manufacturing Table Chart
|
|
Hardening
|
|
|||||||
|
Preheat
temperature |
Hardening
temperature
|
Time at
Quenching
|
Tempering
temperature
|
||||||
|
Type
|
Rate of heating
|
°C
|
°F
|
°C
|
°F
|
temp, min
|
medium (a)
|
°C
|
°F
|
|
Molybdenum high-speed steels
|
|||||||||
|
M1,M7,
M10 |
Rapidly from preheat
|
730-845
|
1350-1550
|
1175-1220
|
2150-2225(b)
|
2-5
|
O, A or S
|
540-595(c)
|
1000-1100(c)
|
|
M2
|
Rapidly from preheat
|
730-845
|
1350-1550
|
1190-1230
|
2175-2250(b)
|
2-5
|
O, A or S
|
540-595(c)
|
1000-1100(c)
|
|
M3, M4,
M30, M33,
M34
|
Rapidly from
preheat
|
730-845
|
1350-1550
|
1205
1230(b)
|
2200-
2250(b)
|
2-5
|
O, A or S
|
540-595(c)
|
1000
1100(c)
|
|
M6
|
Rapidly from preheat
|
790
|
1450
|
1175-1205(b)
|
2150-2200(b)
|
2-5
|
O, A or S
|
540-595(c)
|
1000-1100(c)
|
|
M36
|
Rapidly from preheat
|
730-845
|
1350-1550
|
1200-1245(b)
|
2225-2275(b)
|
2-5
|
O, A or S
|
540-595(c)
|
1000-1100(c)
|
|
M41
|
Rapidly from preheat
|
730-845
|
1350-1550
|
1190-1215(b)
|
2175-2220(b)
|
2-5
|
O, A or S
|
540-595(c)
|
1000-1100(d)
|
|
M42
|
Rapidly from
preheat
|
730-845
|
1350-1550
|
1190
1210(b)
|
2175-
2210(b)
|
2-5
|
O, A or S
|
510
595(d)
|
950
1100(d)
|
|
M43
|
Rapidly from
preheat
|
730-845
|
1350-1550
|
1190
1215(b)
|
2175-
2220(b)
|
2-5
|
O, A or S
|
510
595(d)
|
950
1100(d)
|
|
M44
|
Rapidly from preheat
|
730-845
|
1350-1550
|
1200-1225(b)
|
2190-2240(b)
|
2-5
|
O, A or S
|
540-625(d)
|
1000-1160(d)
|
|
M46
|
Rapidly from preheat
|
730-845
|
1350-1550
|
1190-1220(b)
|
2175-2225(b)
|
2-5
|
O, A or S
|
525-565(d)
|
975-1050(d)
|
|
M47
|
Rapidly from preheat
|
730-845
|
1350-1550
|
1180-1205(b)
|
2150-2200(b)
|
2-5
|
O, A or S
|
525-595(d)
|
975-1100(d)
|
|
Tungsten high-speed steels
|
|||||||||
|
T1, T2,
T4,T8
|
Rapidly from preheat
|
815-870
|
1500-1600
|
1260-
1300(b)
|
2300-
2375(b)
|
2-5
|
O, A or S
|
540-595(c)
|
1000-
1100(c)
|
|
T5, T6
|
Rapidly from preheat
|
815-870
|
1500-1600
|
1275-1300(b)
|
2325-2375(b)
|
2-5
|
O, A or S
|
540-595(c)
|
1000-1100(c)
|
|
T15
|
Rapidly from preheat
|
815-870
|
1500-1600
|
1205-1260(b)
|
2200-2300(b)
|
2-5
|
O, A or S
|
540-650(d)
|
1000-1200(d)
|
|
Chromium hot-work steels
|
|||||||||
|
H10
|
Moderately from preheat
|
815
|
1500
|
1010-1040
|
18501900
|
15-40(e)
|
A
|
540-650
|
10001200
|
|
H11, H12
|
Moderately from preheat
|
815
|
1500
|
995-1025
|
18251875
|
15-40(e)
|
A
|
540-650
|
10001200
|
|
H13
|
Moderately from preheat
|
815
|
1500
|
995-1040
|
18251900
|
15-40(e)
|
A
|
540-650
|
10001200
|
|
H14
|
Moderately from preheat
|
815
|
1500
|
1010-1065
|
18501950
|
15-40(e)
|
A
|
540-650
|
10001200
|
|
H19
|
Moderately from preheat
|
815
|
1500
|
1095-1205
|
20002200
|
2-5
|
A or O
|
540-705
|
10001300
|
|
Molybdenum hot work steels
|
|||||||||
|
H41, H43
|
Rapidly from preheat
|
730-845
|
1350-1550
|
1095-1190
|
20002175
|
2-5
|
O, A or S
|
565-650
|
10501200
|
|
H42
|
Rapidly from preheat
|
730-845
|
1350-1550
|
1120-1220
|
20502225
|
2-5
|
O, A or S
|
565-650
|
10501200
|
|
Tungsten hot work steels
|
|||||||||
|
H21, H22
|
Rapidly from preheat
|
815
|
1500
|
1095-1205
|
20002200
|
2-5
|
A or O
|
595-675
|
11001250
|
|
H23
|
Rapidly from preheat
|
845
|
1550
|
1205-1260
|
22002300
|
2-5
|
O, A or S
|
650-815
|
12001500
|
|
H24
|
Rapidly from preheat
|
815
|
1500
|
1095-1230
|
20002250
|
2-5
|
O, A or S
|
565-650
|
10501200
|
|
H25
|
Rapidly from preheat
|
815
|
1500
|
1150-1260
|
21002300
|
2-5
|
A or O
|
565-675
|
10501250
|
|
H26
|
Rapidly from preheat
|
870
|
1600
|
1175-1260
|
21502300
|
2-5
|
O, A or S
|
565-675
|
10501250
|
|
Medium-alloy air-hardening cold work steels
|
|||||||||
|
A2
|
Slowly
|
790
|
1450
|
925-980
|
17001800
|
20-45
|
A
|
175-540
|
3501000
|
|
A3
|
Slowly
|
790
|
1450
|
955-980
|
17501800
|
25-60
|
A
|
175-540
|
3501000
|
|
A4
|
Slowly
|
675
|
1250
|
815-870
|
15001600
|
20-45
|
A
|
175-425
|
350-800
|
|
A6
|
Slowly
|
650
|
1200
|
830-870
|
15251600
|
20-45
|
A
|
150-425
|
300-800
|
|
A7
|
Very slowly
|
815
|
1500
|
955-980
|
17501800
|
30-60
|
A
|
150-540
|
3001000
|
|
A8
|
Slowly
|
790
|
1450
|
980-1010
|
18001850
|
20-45
|
A
|
175-595
|
3501100
|
|
A9
|
Slowly
|
790
|
1450
|
980-1025
|
18001875
|
20-45
|
A
|
510-620
|
9501150
|
|
A10
|
Slowly
|
650
|
1200
|
790-815
|
14501500
|
30-60
|
A
|
175-425
|
350-800
|
|
Oil-hardening cold work steels
|
|||||||||
|
O1
|
Slowly
|
650
|
1200
|
790-815
|
14501500
|
10-30
|
O
|
175-260
|
350-500
|
|
O2
|
Slowly
|
650
|
1200
|
760-800
|
14001475
|
5-20
|
O
|
175-260
|
350-500
|
|
O6
|
Slowly
|
-
|
-
|
790-815
|
14501500
|
10-30
|
O
|
175-315
|
350-600
|
|
O7
|
Slowly
|
650
|
1200
|
790-830
|
14501525
|
10-30
|
O or W
|
175-290
|
350-550
|
|
|
|
|
845-885
|
15501625
|
|
|
|
|
|
|
Shock-resisting steels
|
|||||||||
|
S1
|
Slowly
|
-
|
-
|
900-955
|
16501750
|
15-45
|
O
|
205-650
|
4001200
|
|
S2
|
Slowly
|
650(f)
|
1200(f)
|
845-900
|
15501650
|
5-20
|
B or W
|
175-425
|
350-800
|
|
S5
|
Slowly
|
760
|
1400
|
870-925
|
16001700
|
5-20
|
O
|
175-425
|
350-800
|
|
S7
|
Slowly
|
650-705
|
1200-1300
|
925-955
|
17001750
|
15-45
|
A or O
|
205-620
|
4001150
|
|
Mold steels
|
|||||||||
|
P2
|
|
900-925(g)
|
1650-1700(g)
|
830-845(h)
|
1525-1550(h)
|
15
|
O
|
175-260
|
350-500
|
|
P3
|
|
900-925(g)
|
1650-1700(g)
|
800-830(h)
|
1475-1525(h)
|
15
|
O
|
175-260
|
350-500
|
|
P4
|
|
900-925(g)
|
1775-1825(g)
|
970-995(h)
|
1775-1825(h)
|
15
|
A or O
|
175-480
|
350-900
|
|
P5
|
|
900-925(g)
|
1650-1700(g)
|
845-870(h)
|
1550-1600(h)
|
15
|
O or W
|
175-260
|
350-500
|
|
P6
|
|
900-925(g)
|
1650-1700(g)
|
790-815(h)
|
1450-1500(h)
|
15
|
A or O
|
175-230
|
350-450
|
|
P20
|
-
|
870-900(h)
|
1600-1650(h)
|
815-870
|
15001600
|
15
|
O
|
480-595(i)
|
900-1100(i)
|
|
P21(j)
|
Slowly
|
Do not preheat
|
|
705-730
|
13001350
|
60-180
|
A or O
|
510-550
|
9501025
|
|
Low-alloy special-purpose steels
|
|||||||||
|
L2
|
Slowly
|
-
|
-
|
W: 790-845
|
W: 1450-1550
|
10-30
|
O or W
|
175-540
|
350-1000
|
|
|
|
|
O: 845-925
|
O: 1550-1700
|
|
|
|
|
|
|
L3
|
Slowly
|
-
|
-
|
W: 775-815
|
W: 1425-1500
|
10-30
|
O or W
|
175-315
|
350-600
|
|
|
|
|
|
O: 815-870
|
O: 1500-1600
|
|
|
|
|
|
L6
|
Slowly
|
-
|
-
|
790-845
|
1450-1550
|
10-30
|
O
|
175-540
|
350-1000
|
|
Carbon-tungsten special-purpose steels
|
|||||||||
|
F1, F2
|
Slowly
|
650
|
1200
|
790-870
|
14501600
|
15
|
W or B
|
175-260
|
350-500
|
|
Water-hardening steels
|
|||||||||
|
W1, W2, W3
|
Slowly
|
565-650(k)
|
1050-1200(k)
|
760-815
|
14001550
|
10-30
|
B or W
|
175-345
|
350-650
|
|
High-carbon, high-chromium cold work steels
|
|||||||||
|
D1, D5
|
Very Slowly
|
815
|
1500
|
980-1025
|
18001875
|
15-45
|
A
|
205-540
|
4001000
|
|
D3
|
Very Slowly
|
815
|
1500
|
925-980
|
17001800
|
15-45
|
O
|
205-540
|
4001000
|
|
D4
|
Very Slowly
|
815
|
1500
|
970-1010
|
17751850
|
15-45
|
A
|
205-540
|
4001000
|
|
D7
|
Very Slowly
|
815
|
1500
|
1010-1065
|
18501950
|
30-60
|
A
|
150-540
|
3001000
|
Notes:
- (a)O, oil quench; A, air cool; S, salt bath quench; W, water quench; B, brine quench.
(b) When the high-temperature heating is carried out in a salt bath, the range of temperatures should be about 15ºC (25ºF) lower than given in this line.
(c) Double tempering recommended for not less than 1 h at temperat
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