Guidelines for Selecting Tool Steel Grades when Considering TDX Treatment

Cold Working Die Steels
GradeSubstrate
Hardness *
Treatability
A-2RC 55/59Good
A-6RC 53/58Good
S-7RC 50/55Fair
D-2RC 55/59Excellent
D-5RC 55/59Excellent
D-7RC 55/59Excellent
SKD-11
(D-2)
Japanese Steel
RC 55/59Excellent
AUD-11
(Modified D-2 Tool Steel)
Japanese Steel
RC 55/59Excellent
DC-53 / K340 / Vertex
Japanese Steel
RC 55/59Excellent

The hardness on some of the above steels can be raised to RC 58/61 by “post hardening”. This service adds to cost and time and is quoted separately.

Hot Working Die Steels
GradeSubstrate
Hardness *
Treatability
H-13RC 49/54Good

On all Hot Working Die Steels it is recommended that “Premium Quality” steels be used. This will assure sufficient carbon content (>.3%) for TD treatment. Lower hardness of RC 44/48 on H-13 can be obtained upon request.

High Speed Steels
GradeSubstrate
Hardness *
Treatability
M-2RC 54/58Excellent
M-4RC 55/59Excellent
T-15RC 56/60Excellent

All of the above High Speed Steels are “under-hardened” during TD treatment, providing higher toughness. Higher hardness, if desired, is possible with “post hardening”. This service adds to cost and time and is quoted separately.

Powder Particle Steel
(Specialty Steels)
GradeSubstrate
Hardness *
Treatability
CPM-3VRC 51/55Good
CPM-9VRC 49/54Good
CPM-10V
Crucible
RC 55/59Excellent
CPM-M4
Crucible
RC 55/59Good
VANADIS-4
Uddeholm
RC 53/58Excellent
VANADIS-10
Uddeholm
RC 55/59Excellent
VANADIS-23
Uddeholm
RC 56/60Excellent

All of the above specialty steels have excellent dimensional stability during TD treatment, excellent hardenability during TD treatment, and can be “post hardened” to higher hardness, if required. A slight increase in cost and turn-around time is experienced with this process, so it is quoted separately.

Cemented Carbides
GradeSubstrate
Hardness *
Treatability
WC> RC 70Excellent

Most Cemented Carbide grades have shown excellent results when TD treated. Substrate hardness of the carbide is not affected by TD treatment. Dimensional stability is excellent. We recommend carbide grades be at least 10% cobalt for best results.

* All Rockwell “C” readings of substrate hardness experienced after TD treatment.

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