Steel Code 

Chemical Composition, weight %

Name

No

C
%

Si 
%

Mn
%

P
≤ %

S
≤ %

Pb
%

Steels where no heat treatment will be applied

 11 SMn30

1.0715

≤ 0.14

≤ 0.05

0.90 - 1.30

≤ 0.11

0.27 - 0.33

-

11SMnPb30

1.0718

≤ 0.14

0.05

0.90 - 1.30

≤ 0.11

0.27 -0.33

0.22 - 0.35

11SMn37

1.0736

≤ 0.14

0.05

1.00 - 1.50

0.11

0.34 - 0.40

-

11SMnPb37

1.0737

≤ 0.14

0.05

1.00 - 1.50

0.11

0.34 - 0.40

0.20 - 0.35

Case hardening steels

10S20

1.0721

0.07 - 0.13

≤ 0.40

0.70 - 1.10

0.06

0.15 - 0.25

-

10SPb20

1.0721

0.07 - 0.13

≤ 0.40

0.70 - 1.10

0.06

0.15 - 0.25

0.20 - 0.35

15SMn13

1.0725

0.12 - 0.18

≤ 0.40

0.90 - 1.30

0.06

0.08 - 0.18

-

Directly hardening steels

35S20

1.0726

0.32 - 0.39

≤ 0.40

0.70 - 1.10

0.06

0.15 - 0.25

-

35SPb20

1.0756

0.32 - 0.39

≤ 0.40

0.70 - 1.10

0.06

0.15 - 0.25

0.15 - 0.35

36SMn14

1.0764

0.32 - 0.39

≤ 0.40

1.30 - 1.70

0.06

0.10 -0.18

-

36SMnPb14

1.0765

0.32 - 0.39

≤ 0.40

1.30 - 1.70

0.06

0.10 - 0.18

0.15 - 0.35

38SMn28

1.0760

0.35 - 0.40

≤ 0.40

1.20 - 1.50

0.06

0.24 - 0.33

-

38SMnPb28

1.0761

0.35 - 0.40

≤ 0.40

1.20 - 1.50

0.06

0.24 - 0.33

0.15 - 0.35

44SMn28

1.0762

0.40 - 0.48

≤ 0.40

1.30 - 1.70

0.06

0.24 - 0.33

-

44SMnPb28

1.0763

0.40 - 0.48

≤ 0.40

1.30 - 1.70

0.06

0.24 - 0.33

0.15 - 0.35

46S20

1.0727

0.42 - 0.50

≤ 0.40

0.70 - 1.10

0.06

0.15 - 0.25

-

46SPb20

1.0757

0.42 - 0.50

≤ 0.40

0.70 - 1.10

0.06

0.15 - 0.25

0.15 - 0.35

 Acceptable Tolerances Between Specified Analysis and Fragment Analysis

Element

The highest Acceptable Content According to the Pot, weight %

Acceptable Deviation %

C

> 0.30

≤ 0.30
≤ 0.50

± 0.02
± 0.03

Si

> 0.05

≤ 0.05
≤ 0.40

+ 0.01
+ 0.03

Mn

> 1.00

≤ 1.00
≤ 1.70

± 0.04
± 0.06

P

> 0.06

≤ 0.06
≤ 1.70

+ 0.008
+ 0.02

S

> 0.33

≤ 0.33
≤ 0.40

± 0.03
± 0.04

Pb

≤ 0.35

+ 0.03
- 0.02