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