Evaluation of Special Quality Die Steels
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Evaluation of Special Quality Die Steels NADCA Project Die Materials Committee Purdue – Oct. 2009. STEELS. BohlerUddeholm Dievar Thyssen E38K Thyssen 2367 Ellwood ExELL Tuf-Die SAMPLES-Phase I 4- Thermal fatigue samples quenched in oil, triple tempered to 44-46HRC

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Evaluation of Special Quality Die Steels

NADCA Project

Die Materials Committee

Purdue – Oct. 2009


STEELS

BohlerUddeholm Dievar

Thyssen E38K

Thyssen 2367

Ellwood ExELL Tuf-Die

SAMPLES-Phase I

4- Thermal fatigue samples quenched in oil, triple tempered to

44-46HRC

5- Charpy V-notch, heat treated in oil and triple tempered to

44-46HRC. 

4- Thermal fatigue samples quenched in a vacuum furnace and

triple tempered to 44-46HRC (welded to a 16” block). 

5- Charpy V-notch quenched in vacuum and triple tempered to

44- 46HRC (cut from plate that was welded to a 16” block).


STEELS

BohlerUddeholm Dievar

Thyssen E38K

Thyssen 2367

Ellwood ExELL Tuf-Die

SAMPLES-Phase II

4- Thermal fatigue samples quenched in oil, triple tempered to

48-50HRC

5- Charpy V-notch, heat treated in oil and triple tempered to

48-50HRC. 

4- Thermal fatigue samples quenched in a vacuum furnace and

triple tempered to 48-50HRC (welded to a 16” block). 

5- Charpy V-notch quenched in vacuum and triple tempered to

48- 50HRC (cut from plate that was welded to a 16” block).


Flow Chart for Die Steel Evaluation

Receive steel block – mark grain orientation

Cut blanks for Thermal Fatigue and Charpy V-notch

Rough machine

CVN “potential”

Rough machine Thermal

Fatigue and CVN plate

Oil quench

CVN “potential”

Vacuum quench Thermal

Fatigue and CVN plate

Finish/ Grind Thermal Fatigue and Charpy V-notch

Test Thermal Fatigue and Charpy V-notch Impact

Report Thermal Fatigue and CVN Results


Cutting line

Charpy impact specimens are taken from the “red” bar as shown in page 2.

8’’

7’’

2.215’’

2.125’’

2.125’’

2.125’’

8’’

2.3’’

2.125’’

2.125’’

Length direction

Thickness direction

* taken from a 12" thick x 10" wide slab



CAPABILITY HEAT TREATMENT (44-46HRC)

NADCA

GRADE

ID

SUPPLIER

AUSTENITIZING

TEMPERx3

TYPE


CAPABILITY HEAT TREATMENT

(Oil Quench and Triple Tempered to 44-46HRC)


CAPABILITY HEAT TREATMENT (48-50HRC)

NADCA

GRADE

ID

SUPPLIER

AUSTENITIZING

TEMPERx3

TYPE


CAPABILITY HEAT TREATMENT

(Oil Quench and Triple Tempered to 48-50HRC)


VACUUM HEAT TREATMENT

(Triple Tempered to 44-46HRC)


Average Maximum Crack Length

Superior Steels (Oil quench)

44-46HRC


Total Crack Area

Superior Steels (Oil Quench)

44-46HRC


Average Maximum Crack Length

Superior Steels (Vacuum Quench)

44-46HRC


Total Crack Area

Superior Steels (Vacuum Quench)

44-46HRC



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