Holder Block
Technical Data Sheet
Chemistry
Comparable Standard: AISI 4130
Typical
C
Mn
Si
Cr
Mo
Analysis % .35 .60 .50 1.25
.30 .
Description
• Holder Block is a modified AISI-4130 material with higher
chromium and molybdenum content specifically designed
holder steel for molds and dies.
• The material is forged on a 5000 ton press assuring maximum
deformation during the forging process.
• Supplied in a pre-heat treated condition 269-321 BHN (28-34
HRC).
Characteristics
• Good machinability
Applications
• Die holders
• Frames for plastic molds
Physical Properties
Coefficient of
Thermal
Expansion
70
0
F – 200
0
F
7.0 X 10
-6
/
0
F
70
0
F – 600
0
F
7.25 X 10
-6
/
0
F
70
0
F – 800
0
F
7.5 X 10
-6
/
0
F
Thermal
Conductivity
70
0
F
202 Btu/in/ft
2
/
hr/
0
F
400
0
F
209 Btu/in/ft
2
/
hr/
0
F
750
0
F
216 Btu/in/ft
2
/
hr/
0
F
Heat Treatment
Welding
Polishing
Holder Block is primarily used as a frame material for plastic
molds and die cast dies. It is not intended for tools which
require a high surface finish. A Schmolz & Bickenbach
rep-
resentative should be consulted
for additional information
Density: 0.285 lbs/in
3
(room temperature)
Mechanical Properties
All statements regarding the properties or utilization of the materials
or products mentioned are for the purposes of description only. Guar-
antees regarding the existence of certain properties or a certain utili-
zation are only valid if agreed upon in writing.
General Note
Yield
Strength
Tensile
Strength
Elongation
Reduction
Area
100 KSI
125 KSI
17%
35%
Room Temperature, Heat Treated to 248-302 BHN (24-32 HRC)
Electrode
Dia. (mm)
Filler
Rod
Dia (mm)
Welding
AMPS
Argon
Flow
Lt/min
Nozzle
Dia (mm)
1.0 1.0
15-80 4-8 8
1.6 1.6
70-150
6-9 8-10
2.4 2.4
100-250
7-10 8-10
3.2 3.2
250-400
10-15
8-10
• Preheat insert to 600
0
F to 700
0
F. Maintain temperature
above 600
0
F during welding.
• Use TIG with D.C. positive polarity.
• Depending on the application, various welding rods can
be used. P20 filler which will match the hardness of the
base metal after welding and tempering is commonly
used. Please contact our heat treatment facility for rec-
ommendations.
• Slowly cool down to 100
0
F– 150
0
F , preferably under an
insulating blanket, before post heat.
• Post heat at 1000
0
F
one hour per inch of weld depth plus
one additional hour—double temper if possible. Exceed-
ing 1050
0
F could result in the loss of hardness.
Temperature
o
F
700 800 900 1000 1050 1100
Hardness
HRC
46 43 40 37 32 30
1150
22
Tempering
• Heat uniformly and thoroughly at the selected tempera-
ture and hold at temperature for one hour per inch of total
thickness.
• Tempering hardness is approximate and based on two
hours at temperature
• Please contact your Schmolz & Bickenbach heat treat rep-
resentative for more detailed in
formation.
USA 800.323.1233
CANADA 800.268.4977
HEAT TREATMENT 800.265.0862
www.schmolz-bickenbach.us
www.schmolz-bickenbach.ca