DIMO C45: Premium Unalloyed Carbon Tool Steel for Mold Assembly

DIMO C45 is an unalloyed carbon tool steel for the construction of plastic mold assemblies.

DIMO C45 is supplied in a stress relieved condition with a normalized ferrite-pearlite-microstructure. The normalizing can be replaced by a normalizing rolling. Cut edges are stress relieved by an appropriate heat treatment.

DIMO C45 is a modified version of C45 in accordance with DIN EN ISO 4957 (steel number 1.1730), DIN EN 10083-2 (steel number 1.0503 or 1.1191) respectively Grade 1045 in accordance with ASTM A 830 in holderblock quality.

Properties

Mechanical

Property	Value	Comment
Hardness, Brinell	150 - 220 [-]	HBW \| delivery condition

Thermal

Property	Temperature	Value	Comment
Coefficient of thermal expansion		1.11e-05 1/K	20-100 °C
		1.18e-05 1/K	20-200 °C
		1.28e-05 1/K	20-300 °C
		1.36e-05 1/K	20-400 °C
		1.37e-05 1/K	20-500 °C
		1.43e-05 1/K	20-600 °C
Specific heat capacity		470 J/(kg·K)
Thermal conductivity	20 °C	48 W/(m·K)
	100 °C	49 W/(m·K)
	200 °C	49 W/(m·K)
	300 °C	48 W/(m·K)
	400 °C	47 W/(m·K)

Chemical properties

Property	Value	Comment
Carbon	0.42 - 0.5 %	limiting values
	0.47 %	auxiliary data
Chromium	0.04 %	auxiliary data
	0.4 %	max. limiting values for steel grades according DIN EN 10083-2
Iron	Balance
Manganese	0.5 - 0.8 %	limiting values
	0.74 %	auxiliary data
Molybdenum	0.09 %	auxiliary data
	0.1 %	max. limiting values for steel grades according DIN EN 10083-2
Nickel	0.04 %	auxiliary data
	0.4 %	max. limiting values for steel grades according DIN EN 10083-2
Other	0.09 %	auxiliary data
	0.63 %	max. limiting values for Cr+Mo+Ni for steel grades according DIN EN 10083-2
Phosphorus	0.017 %	auxiliary data
	0.025 %	max. limiting values
Silicon	0.34 %	auxiliary data
	0.4 %	max. limiting values
Sulfur	0.002 %	auxiliary data
	0.01 %	max. limiting values

Technological properties

Property

Application areas

DIMO C45 is designed for holderblock applications requiring extensive machining and high dimensional stability as mold assemblies, ejector plates, supports, clamping plates and housings for diecasting dies.

Delivery condtion

General note

If special requirements, which are not listed in this specification, are to be met by the steel due to its intended use or processing, these requirements are to be agreed before placing the order.

The information in this specification is a product description. This specification is updated if necessary. The latest version is available from the mill or as download at www.dillinger.de.

Heat Treatment

DIMOC45 is generally applied in the delivery condition. Should a heat treatment become necessary, please refer to the material data sheet at www.dillinger.de.

Other

DIMO C45 is available as plate with cut edges (sheared, flame cut or water jet cut) in the following dimensions:

Thickness	≥ 10 ≤ 130 mm	≥ 3/8 ≤ 5 in	> 130 ≤ 305 mm	> 5 ≤ 12 in
Width	≥ 1000 ≤ 3000 mm	≥ 40 ≤ 119 in	≥ 1000 ≤ 2050 mm	≥ 40 ≤ 80.5 in
Length	≥ 3000 ≤ 6000 mm	≥ 119 ≤ 236 in	≥ 3000 ≤ 6000 mm	≥ 119 ≤ 236 in

Widths < 1500 mm (59 in) have to be ordered with an even number of plates, Other dimensions available upon request.

Identification of plates Unless otherwise agreed the marking is carried out via steel stamps with at least the following information:

steel grade (DIMO C45)

heat number

number of mother plate and individual plate

the manufacturer’s symbol

inspector’s sign

Processing history

The DIMO C45 production route is designed to achieve good machinability, dimensional stability and high cleanliness. The good oxidic cleanliness and the modification of remaining inclusions by the calcium treatment lead to good machinability and minimize the tool wear. These properties can only be achieved by the combination of the following DIMO C45-production steps:

hot metal desulphurization

vacuum degassing

argon stirring for high sulfidic and oxidic cleanliness

calcium treatment for inclusion shape control

special casting conditions to assure the high cleanliness and homogeneity

High Shape Factor Rolling (high thickness reduction) to realize a closely packed structure

appropriate heat treatment parameters according to analysis and dimensions to assure homogeneous hardness distribution over the plate and to minimize residual stresses.

Surface condition

Surface quality: Unless otherwise agreed, the specifications will be in accordance with EN 10163-2 class A, subclass 3. Shot blasting of upper and lower surface of the plate and shop priming are possible on request.

Testings

Heat analysis

Dimension control

Surface inspection

Hardness: The hardness (HBW) is tested on surface of a rolled mother plate

Tensile test acc. DIN EN 10083-2 can be agreed

Ultrasonic testing: Unless otherwise agreed, ultrasonic testing is performed on each plate in accordance with EN 10160, class S2/E3, 100 % of the surface. Upon request, an ultrasonic testing in accordance with ASTM A 578, Level C + S1 is possible. In this case the desired testing standard has to be indicated on the order.

Unless otherwise agreed, the results are documented in an inspection certificate 3.1 in accordance with EN 10204.

Tolerances

Unless otherwise agreed, tolerances are in accordance with EN 10029 with the following restrictions:

plate thickness	in accordance with EN 10029, class C
plate thickness	≥ 1000 mm ≤ 1500 mm	± 25 mm	≥ 40 ≤ 59 in	± 1 in
	> 1500 mm ≤ 2050 mm	± 40 mm	> 59 ≤ 80.5 in	± 1.5 in
	> 2050 mm	± 50 mm	> 80.5 in	± 2 in
plate length		± 500 mm		± 20 in
flatness	≤ 3 mm/m (1/8 in/40 in)

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