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DILLIDUR IMPACT is a wear resistant steel with a nominal hardness of 340 HBW in delivery condition.

DILLIDUR IMPACT is not a constructional steel CE-certified according to EN 10025.

DILLIDUR IMPACT is applied where high resistance to abrasion is required together with high toughness and crack resistance and a good workability.

In spite of their high tensile properties, DILLIDUR steels are not intended for safety relevant components. For this purpose high strength steels DILLIMAX are available.

Related Standards

This material data has been provided by Dillinger.

"Typical" values were obtained via a literature search. "Predicted" values were imputed via artificial intelligence technology. While we have placed significant efforts in ensuring data accuracy, "typical" and "predicted" data should be considered indicative and verified by appropriate material testing. Please do contact us if additional information on the the predicted data method is required.
All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.

Ashby charts




Carbon equivalent (CET)

0.4 [-]

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max. value for thickness 40 ≤ t ≤ 80 mm

0.43 [-]

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max. value for thickness 80 ≤ t ≤ 150 mm

Carbon equivalent (CEV)

0.66 [-]

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max. value for thickness 40 ≤ t ≤ 80 mm

0.74 [-]

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max. value for thickness 80 ≤ t ≤ 150 mm

Carbon equivalent note

CEV = C + Mn/6 + (Cr+Mo+V)/5 + (Cu+Ni)/15 and CET = C + (Mn+Mo)/10 + (Cr+Cu)/20 + Ni/40


PropertyTemperatureValueTesting StandardComment

Charpy impact energy, V-notch

-40 °C

30 J

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Plate Thickness t [mm]: 40 ≤ t ≤ 150 (1.6 in. ≤ t ≤ 6 in.) | The approximately converted values in brackets are for information only.


15 %

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indicative values for 90 mm plate thickness, A5

Hardness, Brinell

310 - 370 [-]

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EN ISO 6506-1


Tensile strength

1000 MPa

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indicative values for 90 mm plate thickness

Yield strength

950 MPa

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ReH | indicative values for 90 mm plate thickness

Chemical properties



0.005 %

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0.21 %

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1.5 %

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3 %

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max. Ni+Cu




1.8 %

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0.7 %

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3 %

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max. Ni+Cu


0.04 %

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0.02 %

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0.6 %

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0.01 %

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0.09 %

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Technological properties

Application areas

Examples of application: heavy (welded) wear parts in earth moving, mining, demolition and recycling equipment

Cold Forming

Cold forming means forming at temperatures below or equal 500 °C (932 °F).

DILLIDUR IMPACT is suitable for cold forming taking its high hardness into account. Flame cut or sheared edges in the bending area should be grinded before cold forming.

Cold forming of DILLIDUR IMPACT should be carried out according to the following recommendations, where t is the plate thickness:

Position of bending line to rolling directionMinimum bending radiusMinimum die width
Transverse direction3 t9 t
Longitudinal direction4 t12 t

During the processing, the necessary security measures have to be taken, so that nobody will be exposed to a danger by a possible fracture of the work piece during the forming process.

Delivery condtion

Controlled water quenched and tempered.

Unless otherwise agreed, the general technical requirements in accordance with EN 10021 are applicable.

Flame cutting and welding

DILLIDUR IMPACT can be flame cut. For flame cutting, the following minimum preheating temperatures should be respected: 50 °C (122 °F) for plate thicknesses from 40 mm up to 70 mm and 100 °C (212 °F) for thicker plates.

Slow cooling after flame cutting and /or subsequent heating of the flame cut edge is beneficial for reducing detrimental stress concentration, especially for higher plate thickness.

DILLIDUR IMPACT can be welded with all conventional arc welding methods. Welding of DILLIDUR IMPACT requires special care due to its high hardness. Please consult EN 1011-2. Keep the surface dry and clean and use consumables with a low hydrogen content (type HD< 5 ml / 100 g in accordance with ISO 3690).

Use filler metals as soft as the loading of the construction and wear allow for. Because of the large plate thickness of DILLIDUR IMPACT, a minimum preheat and interpass temperature of 150 °C (302 °F) shall be respected.

General note

If special requirements, which are not covered 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 at irregular intervals. The current version is relevant. The current version is available from the mill or as download at www.dillinger.de.

Heat Treatment

If a stress relieving temperature has to be considered, please contact the producer. The properties may be altered by a stress relief heat treatment.

Hot forming

If the temperature of 500 °C (932 °F) is exceeded, the initial tempering will be altered so that the mechanical properties are affected. To regain the initial properties new quenching and tempering become necessary.

However, water quenching of a formed work piece or component will often be less effective than the original quenching in the plate mill so that the fabricator may not be able to re-establish the properties required and therefore hot forming is not suitable.

Finally, it is the fabricator’s responsibility to obtain the required values of the steel through an appropriate heat treatment.


DILLIDUR IMPACT can be machined with HSS-drills and especially with HSS-Co-alloyed drills with a satisfactory service life if the drill advance and cutting speed are correspondingly accommodated.


The production range of DILLIDUR IMPACT plates is 40 mm (1.6 in.) to 150 mm (6 in.), please see delivery program. Other dimensions may be possible on request.

Identification of plates: Unless otherwise agreed, the marking is carried out with low stress steel stamps with at least the following information:
  • steel grade (DILLIDUR IMPACT)
  • heat number
  • number of mother plate and individual plate
  • the manufacturer’s symbol
  • authorized inspection representative's sign

  • Processing history

    The steel is fully killed and fine grained through sufficient aluminium content.

    Processing methods

    The entire processing and application techniques are of fundamental importance to the reliability of the products made from this steel. The user should ensure that his design, construction and processing methods are aligned with the material, correspond to the state of the art that the fabricator has to comply with and are suitable for the intended use. The customer is responsible for the selection of the material. The recommendations in accordance with EN 1011-2 (Welding) and CEN/TR 10347 (Forming) as well as recommendations regarding job safety in accordance with national rules should be observed while considering the higher strength and hardenability.

    Surface condition

    Surface quality: Unless otherwise agreed, the surface will be in accordance with EN 10163-2, class A2.


    Brinell surface hardness tests according to EN ISO 6506-1 are performed on a ground surface 0.5 mm – 2.0 mm below plate surface.

    The impact tests are performed according to EN 10045-1 on Charpy-V test specimen taken in longitudinal direction at 1⁄4 plate thickness.

    Brinell surface hardness tested once per heat and 40 t (metric tons).

    Charpy tests are carried out once per heat.

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


    Unless otherwise agreed, tolerances are in accordance with EN 10029 class A for the thickness and table 4, steel group H for the maximum flatness deviation.