USA 800.323.1233 CANADA 800.268.4977 HEAT TREATMENT 800.265.0862
www.schmolz-bickenbach.us www.schmolz-bickenbach.ca
THYROTHERM
®
2367 SUPRA ESR
Technical Data Sheet
Chemistry
Typical
C
Si
S
Cr
Mo
V
Analysis % 0.37 0.40 .003 max. 5.0 3.0 0.60
Description
• THYROTHERM® 2367 SUPRA is an electro slag remelted
(ESR) hot work die steel developed for applications where
high temperature properties (tensile strength & thermal con-
ductivity) are required to resist thermal fatigue and temper-
ing.
Characteristics
• Excellent resistance to heat checking
•
Excellent resistance to wear (erosion & abrasion)
•
Excellent high-temperature strength
•
Good tempering resistance
•
Good toughness
Applications
•
High pressure die casting dies
•
Hot forging dies
•
Hot extrusion tooling
•
Forming dies
•
Plastic molds
•
Mandrels
Physical Properties
(Hardened and tempered to 46 HRC)
Mechanical Properties
Density:
0.281 lbs/in
3
(room temperature)
Toughness (CVN): Average 10 ft-lbs. at 44-46 HRC
Tensile Properties: (room temperature)
Hard-
ness
HRC
Y.S
(0.2%)
ksi
T.S.
Ksi
EL
(%)
RA
(%)
52
48
44
225
193
171
267
234
203
12
13
12
35
38
40
Coefficient of
Thermal
Expansion
70
0
F – 200
0
F
6.6
X 10
-6
/
0
F
70
0
F – 400
0
F
6.9
X 10
-6
/
0
F
70
0
F – 750
0
F
7.0 X 10
-6
/
0
F
Thermal
Conductivity
70
0
F
206
Btu/in/ft
2
/
hr/
0
F
650
0
F
235
Btu/in/ft
2
/
hr/
0
F
1300
0
F
245 Btu/in/ft
2
/
hr/
0
F
Heat Treatment
Welding
Soft Annealing
Stress Relieving
Hardening (Refer to TTT diagram on page 2)
Tempering (See tempering diagram on page 2)
• Tempering hardness is approximate and based on two hours at
temperature
• In order to achieve faster quench rates, generous radii and ma-
chining stock should be left on during rough machining.
• Optimal heat treatment parameters should be followed to achieve
maximum potential die performance.
• Please contact your Schmolz & Bickenbach heat treat representa-
tive for more detailed in
formation.
Temperature
Cooling
Hardness
1345
o
F - 1435
o
F
Furnace 20
o
F/hour to 1200
o
F
Then air cool.
235 HB
Max
Temperature
Cooling
Hardness
1200
o
F for 2
hours
Cool slowly to 900
o
F in air
230 HB
Max
Temperature
Cooling
Hardness
1875
o
F - 1920
o
F
Hold at
temperature for
30 minutes
Vacuum quench at 50
o
F/min.
to 1000
o
F then cool to below
150
o
F
55 HRC
Max
Quenched
Temperature
o
F
752
932
1022
1112
1202
1292
Hardness
HRC
52
55
55
52
45
36
• THYROTHERM® 2367 Supra can be welded in an annealed and
hardened condition if machining errors, design changes or minor
cracking have occurred. TIG (Tungsten Inert Gas) should pref-
erably be used.
Welding Guidelines
Welding Temperatures
Process
Tig
Current
D.C.
Amperage (A)
100-150
Electrode
Tungsten Thorium
Electrode Diameter
0.10 – 0.17
Protective Gas
Argon
Flow (L/mm)
10
Filler Rod
AISI H-13
Preheat
Temp.
Maintained
Temperature
during
welding
Cool
Down to:
Stress Relieve
620
o
F to
900
o
F
Above 600
o
F 150
o
F
1050
o
F for 2 hours
or 30-50
o
F below previous
tempering temperature
Polishing
For highly cosmetic applications, the tool should be heat treated to the
highest hardness possible. Size of the tool will determine the maxi-
mum hardness. A-1 polish is achievable when proper procedures are
followed. A Schmolz & Bickenbach
representative should be con-
sulted when
determining the hardness.
