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HOT WORK TOOL STEELS


Hot work tool steels applied in hot forming processes such as die casting, forging or extrusion may be damaged on multiple and complex occasions. Damages may arise by collective stress factors combining high mechanical strengths, high temperatures and temperature gradients, whereas the individual stress factors dependent on process type and processing exert variably strong effects on the material.
Material hardness, material strength, toughness, ductility and thermal conductivity are vital hot work tool steel properties when it comes to damage mechanisms to be avoided or delayed.

Hot wear resistance, hot toughness, hot strength, retention of hardness, thermal shock resistance as well as thermal conductivity are characterized not only by the compostion of the hot work tool steel but are metallurgical features regulated during the melting and re-melting process. Our experience and on-going research lead to the continuous improvement of the metallurgical properties.

STEEL PROPERTIES

BÖHLER grade

Type of alloy %

(C - Cr - Mo - V)

Others

DIN

EN

AISI

0.38

5.00

1.30

0.40

Si = 1.10

< 1.2343 >

X38CrMoV51

H11

0.39

5.20

1.40

0.95

Si = 1.10

< 1.2344 >

X38CrMoV51

H13

0.38

5.00

2.0

0.55

-

< 1.2367 >

X38CrMoV53

-

0.31

2.90

2.70

0.50

-

< 1.2365 >

32CrMoV1228
(X32CrMoV33)

H10

0.38

5.00

1.75

0.55

Si = 0.20
N def.

-

-

-

0.50

4.50

3.00

0.60

Si = 0.20

-

-

-

0.36

5.00

1.30

0.45

Si = 0.20

< 1.2340 >

-

H11

0.38

5.00

2.80

0.65

-

-

-

-

max 0.005

-

5.00

-

Ni = 18.50
Co = 9.00
Ti = 0.70
Al = 0.10

~1.2709
1.6358

 X3NiCoMo1885
 X2NiCoMo1895

-

Further details regarding these steels can be found in the data sheet for each steel.
¹ Conventional quality available as ISODISC, ESR quality available as ISOBLOC.

OTHER PROPERTIES

BÖHLER grade

Hardness after
annealing

Hardening
temperature

Quenchant

Obtainable
hardness

Average Rockwell C hardness after tempering at °C

(400 - 500 - 550 - 650 - 650 - 700)

max. 205 HB

1000 – 1040 °C

Oil, Salt bath²

Air, Gas

52 – 56 HRc

50 – 54 HRc

53

54

52

48

38

30

max. 205 HB

1000 – 1040 °C

Oil, Salt bath²

Air, Gas

52 – 56 HRc

50 – 54 HRc

54

55

54

50

40

32

max. 205 HB

1000 – 1040 °C

Oil, Salt bath²

Air, Gas

52 – 56 HRc

50 – 54 HRc

52

54

53

50

44

36

max. 205 HB

1000 – 1040 °C

Oil, Salt bath²

Gas

52 – 56 HRc

50

51

52

50

45

36

max. 205 HB

1000 – 1040 °C

Oil, Salt bath²

Air, Gas

52 – 54 HRc

50 – 53 HRc

-

-

-

-

-

-

max. 205 HB

1000 – 1040 °C

Oil, Salt bath²

Air, Gas

57 - 58 HRc

see tempering chart

max. 205 HB

1000 – 1040 °C

Oil, Salt bath²

Air, Gas

52 – 54 HRc

50 – 53 HRc

53

54

52

48

38

30

max. 205 HB

1000 – 1040 °C

Oil, Salt bath²

Air, Gas

52 – 54 HRc

50 – 53 HRc

52

54

53

50

44

35

¹ For big dies
² Salt bath (500 – 550 °C)

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