Quenching and tempering consists of a two-stage heat-treatment process. Stage one includes hardening, in which the steel is austenitized to approximately 900°C and then quickly cooled with water or oil. Stage two consists of tempering the material to obtain the desired material properties. Quenching and tempering achieves a fine-grained and homogeneous microstructure. Quenched and tempered steel is characterized by high strength and good ductility.

Quenching and tempering steel

EN-standard

Ovako

Typical analysis
   

C

Si

Mn

Cr

Mo

Ni

Other

24CrMo13-6

420

0.24

0.2

0.4

3.1

0.5

 

 

25CrMo4

322, 6014

0.25

0.2

0.9

1.1

0.2

 

 

34CrMo4

34CrMo4

0.34

0.3

0.8

1.1

0.2

 

V

42CrMo4

327, 6082

0.42

0.3

0.8

1.1

0.2

 

 

43CrMnMo4-4

L7

0.43

0.3

0.9

1.0

0.2

 

 

44CrMnMo4-4*

B7

0.44

0.3

0.9

1.0

0.2

 

 

50CrMo4

528

0.51

0.2

0.7

1.0

0.2

 

 
23MnNiMoCr5-4 4209

0.23

0.2

1.3

0.5

0.6

1.0

 
30CrNiMo8 6507

0.30

0.3

0.7

2.0

2.0

0.3

 
30NiCrMo16-6 498

0.30

0.3

0.5

1.4

0.2

4.0

 
31NiCrMo13-4* 453

0.31

0.2

0.5

1.1

0.2

3.1

 
34CrNiMo6 356, 6502

0.34

0.2

0.7

1.4

0.2

1.3

 

40SiCrMnMo7-6-6*

 477

0.40

1.7

1.5

1.5

0.4

 

 
40CrMoV4-6 6098

0.40

0.3

0.7

1.1

0.6

 

V

21CrMoV5-7*

6130, 6132

0.21

0.3

0.6

1.4

0.7

 

V
37CrV3*

9217

0.37

0.3

0.8

0.8

 

 

V
40NiCrMo7-3*

355, 6514

0.40

0.3

0.7

0.8

0.3

1.8

V
32CrMoV12-10*

398

0.32

0.3

0.5

3.0

1.0

 

V

30CrMoV9

6140

0.31

0.2

0.6

2.5

0.2

 

V

40CrMoV4-6*

6098

0.42

0.2

0.8

1.1

0.9

4.0

V

48CrMoNi4-10*

495, 6521

0.48

0.2

0.8

1.1

0.9

4.0

V

42NiSiCrMo8-7-3*

497

0.42

1.6

0.6

0.7

0.3

1.7

V

4CrMn16-4*

8302

0.04

0.3

1.0

4.0

 

 

Nb

7CrMoBS4*

5450

0.07

0.3

0.8

1.3

 

 

B

8CrMnMo15-4*

8303

0.08

0.3

1.0

4.0

0.5

 

 

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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