Ovako has a history of pioneering the use of boron steel and over time has innovated its use and the wide range of variants we can provide today. Boron is a small interstitial element which is added to improve hardenability. It most effective in lower and medium carbon steels with < 0.40% C. Boron increases the strength of heat-treated steels in the quenched and tempered condition. Boron steel grades can be hot worked and direct quenched to achieve a high strength component. It is often a very cost-effective solution. Boron steels are often used in applications subjected to wear.

Boron steel

EN-standard

Ovako

Typical analysis

 

 

C

Si

Mn

Cr

Mo

Ni

Other

20MnB4

SB21M10B

0.20

0.2

1.3

 

 

 

B

22MnB5

SB24M13B

0.24

0.3

1.3

0.2

 

 

B

30MnB5

SB33M13B, BM 312

0.30

0.2

1.3

 

 

 

B

43MnB5-3*

SB43M14B

0.42

0.3

1.4

 

 

 

B

27MnCrB5-2

SB27M12CB, BCM 311

0.27

0.2

1.3

0.5

 

 

B

33MnCrB5-2

SB33M13CB

0.32

0.3

1.3

0.6

 

 

B

39MnCrB6-4

BCM 414

0.39

0.3

1.5

0.5

 

 

B

EN-standard designation followed by “*” is not an official EN standard grade but named according to the rules in EN 10027.

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