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Alloy H Steels - Heat Chemical Ranges and Limits
Alloy H Steel Composition


Chemical Composition, percent

AISI or SAE
Steel No.


C


Mn


SI


NI


Cr


Mo

1330H
1335H
1340H
1345H

.27-.33
.32-.38
.37-.44
.42-.49

1.45-2.05
1.45-2.05
1.45-2.05
1.45-2.05

.15- 35
.15-.35
.15-.35
.15-.35




4027H
4028H*
4032H
4037H

.24-.30
.24-.30
.29-.35
.39-.41

.60-1.00
.60-1.00
.60-1.00
.60-1.00

.15-.35
.15-.35
.15-.35
.15-.35



.20-.30
.20-.30
.20-.30
.20-.30

4042H
4047H
4118H
4130H

.39-.46
.44-.51
.17-.23
.27-.33

.60-1.00
.60-1.00
.60-1.00
.30-.70

.15-.35
.15-.35
.15-.35
.15-.35




.30-.70
.75-1.20

.20-.30
.20-.30
.08-.15
.15-.25

4135H
4137H
4140H
4142H

.32-.38
.34-.41
.37-.44
.39-.46

.60-1.00
.60-1.00
.65-1.10
.65-1.10

.15-.35
.15-.35
.15-.35
.15-.35


.75-1.20
.75-1.20
.75-1.20
.75-1.20

.15-.25
.15-.25
.15-.25
.15-.25

4145H
4147H
4150H
4161H

.42-.49
.44-.51
.47-.54
.55-.65

.65-1.10
.65-1.10
.65-1.10
.65-1.10

.15-.35
.15-.35
.15-.35
.15-.35


.75-1.20
.75-1.20
.75-1.20
.65-.95

.15-.25
.15-.25
.15-.25
.25-.35

4320H
4340H
E4340H**
4419H

.17-.23
.37-.44
.37-.44
.17-.23

.40-.70
.55-.90
.60-.95
.35-.75

.15-.35
.15-.35
.15-.35
.15-.35

1.55-2.00
1.55-2.00
1.55-2.00

.35-.65
.65-.95
.65-.95

.20-.30
.20-.30
.20-.30
.45-.60

4620H
4621H
4626H
4718H

.17-.23
.17-.23
.23-.29
.15-.21

.35-.75
.60-1.00
.40-.70
.60-.95

.15-.35
.15-.35
.15-.35
.15-.35

1.55-2.00
1.55-2.00
.65-1.05
.85-1.25




.30-.60

.20-.30
.20-.30
.15-.25
.30-.40

4720H
4815H
4817H
4820H

.17-.23
.12-.18
.14-.20
.17-.23

.45-.75
.30-.70
.30-.70
.40-.80

.15-.35
.15-.35
.15-.35
.15-.35

.85-1.25
3.20-3.80
3.20-3.80
3.20-3.80

.30-. 60

.15-.25
.20-.30
.20-.30
.20-.30

50B40H
50B44H
5046H
50B46H

.37-.44
.42-.49
.43-.50
.43-.50

.65-1.10
.65-1.10
.65-1.10
.65-1.10

.15-.35
.15-.35
.15-.35
.15-.35


.30-.70
.30-.70
.13-.43
.13-.43


50B50H
50B60H
5120H
5130H

.47-.54
.55-.65
.17-.23
.27-.33

.65-1.10
.65-1.10
.60-1.00
.60-1.10

.15-.35
.15-.35
.15-.35
.15-.35


.30-.70
.30-.70
.60-1.00
.75-1.20


5132H
5135H
5140H
5145H

.29-.35
.32-.38
.37-.44
.42-.49

.50-.90
.50-.90
.60-1.00
.60-1.00

.15-.35
.15-.35
.15-.35
.15-.35


.65-1.10
.70-1.15
.60-1.00
.60-1.00


5147H
5150H
5155H
5160H

.45-.52
.47-.54
.50-.60
.55-.65

.60-1.05
.60-1.00
.60-1.00
.65-1.10

.15-.35
.15-.35
.15-.35
.15-.35


.80-1.25
.60-1.00
.60-1.00
.60-1.00


51B60H
6118H
6150H
81B45H

.55-.65
.15-.21
.47-.54
.42-.49

.65-1.10
.40-.80
.60-1.00
.70-1.05

.15-.35
.15-.35
.15-.35
.15-.35




.15-.45

.60-1.00
.40-.80
.75-1.20
.30-.60


.10-.15 V
.15 Min. V
.08-.15

* Sulfur = .035- 0.50%
** Sulfur = .025 max.

Chemical Composition, percent

AISI or
SAE
Steel No.

C

Mn

Sl

Ni

Cr

Mo

8617H
8620H
8622H
8625H

.14- .20
.17- .23
.19- .25
.22- .28

.60- .95
.60- .95
.60- .95
.60- .95

.15- .35
.15- .35
.15- .35
.15- .35

.35- .75
.35- .75
.35- .75
.35- .75

.35- .65
.35- .65
.35- .65
.35- .65

.15- .25
.15- .25
.15- .25
.15- .25

8627H
8630H
86B30H
8637H

.24- .30
.27- .33
.27- .33
.34- .41

.60- .95
.60- .95
.60- .95
.70- 1.05

.15- .35
.15- .35
.15- .35
.15- .35

.35- .75
.35- .75
.35- .75
.35- .75

.35- .65
.35- .65
.35- .65
.35- .65

.15- .25
.15- .25
.15- .25
.15- .25

8640H
8642H
8645H
86B45H

.37- .44
.39- .46
.42- .49
.42- .49

.70- 1.05
.70- 1.05
.70- 1.05
.70- 1.05

.15- .35
.15- .35
.15- .35
.15- .35

.35- .75
.35- .75
.35- .75
.35- .75

.35- .65
.35- .65
.35- .65
.35- .65

.15- .25
.15- .25
.15- .25
.15- .25

8650H
8655H
8660H
8720H

.47- .54
.50- .60
.55- .65
.17- .23

.70- 1.05
.70- 1.05
.70- 1.05
.60- .95

.15- .35
.15- .35
.15- .35
.15- .35

.35- .75
.35- .75
.35- .75
.35- .75

.35- .65
.35- .65
.35- .65
.35- .65

.15- .25
.15- .25
.15- .25
.20- .30

8740H
8822H
9260H
9310H

.37- .44
.19- .25
.55- .65
.07- .13

.70- 1.05
.70- 1.05
.65- 1.10
.40- .70

.15- .35
.15- .35
1.70-2.20
.15- .35

.35- .75
.35- .75

2.95.3.55

.35- .65
.35- .65

1.00-1.45

.20- .30
.30- .40

.08- .15

94B15H
94B17H
94830H

.12- .18
.14- .20
.27- .33

.70- 1.05
.70- 1.05
.70- 1.05

.15- .35
.15- .35
.15- .35

.25- .65
.25- .65
.25- .65

.25- .55
.25- .55
.25- .55

.08- .15
.08- .15
.08- .15

NOTE 1. The Phosphorus .035 max. and the sulfur = .040 max. unless indicated otherwise.


Maximum per cent

P

S

Basic electric

.025

.025

Basic open hearth or
basic oxygen or TOC


.035


.040

Acid electric

.050

.050

Acid open hearth

.050

.050

NOTE 2. Minimum silicon limit for acid open hearth or acid electric furnace alloy steel is 15 per cent.

NOTE 3. Small quantities of certain elements are present in alloy steels which are not specified or required. These elements are considered as incidental and may be present to the following maximum amounts: Copper, .35 per cent; Nickel, .25 per cent; Chromium, .20 per cent; and Molybdenum, .06 per cent.

NOTE 4. The chemical ranges and limits shown this Table and In the notes below this Table are subject to the product analysis tolerances shown In the AISI Manual. (Dated March, 1986)

NOTE 5. Standard H-Steels can be produced with a lead range of .15/.35 per cent. Such steels are identified by inserting the fetter "L" between the second and third numerals of the AISI number, e.g., 41 L 40 H. Lead is reported only as a range of .15/.35 per cent.

NOTE 6. Where minimum and maximum sulfur content is shown It is indicative of resulfurized steel.