1.6523 (20NiCrMo2) Material Data Sheet

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1.6523 (20NiCrMo2) from stock, sawn to your required dimensions!

International identifiers
AISI 8620, BS 805M20, 806M20, AFNOR 20NCD2, 22NCD2, 20HNM

The steel 1.6523 is used for many parts in mechanical engineering that are case hardened.

Here, and as well as with other case-hardening steels (for example 1.6587), the emphasis is placed on a hard surface and a tough core, which in turn leads to good wear properties.

The materials 1.6523 and 1.6526 are identical in their technical properties and differ only in the sulfur content, which facilitates the machining process.

1.6523 is popularly known as AISI 8620​​​​​.


Main applications

This material is used in a variety of industries for light to medium duty components which require high surface wear resistance with good core strength and impact resistance.


Areas of application

1.6523 is most commonly used for camshafts, racks and guide pins. As well for the production of sleeves, bearings and bushings from it.


1.6523 Material Data Sheet Download

Weldabilitygood weldable
Toughnessvery good
Corrosion resistancelow
Wear resistancegood (in the cured state)

Hot forming: hot forming, for example: Forging, should be carried out between 1100°C - 850°C. This material is then cooled in the air.

Heat treatment

Normalizing: normalizing can be carried out at a temperature of approx. 910°C. Thereafter, an air cooling takes place. This method is another way to improve machinability. Normalizing may also be performed prior to case hardening.

Soft annealing: The material 1.6523 is annealed at temperatures of 650°C - 700°C. This is followed by a slow cooling in the oven.

Heat treatment: The tempering takes place at 840°C - 870°C. Depending on the cross section, it is then quenched in oil or in the air.

Tempering: Temperatures of 200°C - 700°C are required for tempering to improve toughness with minimal impact on hardness.


Nitridingis possible
Machining worksis possible
Flame hardeningis not possible
Induction hardeningis not possible


Physical Properties:

Density in kg / dm37,75
Electrical resistance at 20°C in (Ω mm2)/m 0,12
Elasticity modul (103 MPa)210
Thermal conductivity at 20°C in W/(m K)46
Specific heat capacity at 20°C in J/(kg K)430

Mechanical properties:

Soft annealed: Brinell hardness: < 212 HB

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Chemical composition


min.0,17 0,65  0,350,150,40
In stock

Flat steel, forged, annealed

Advantages of saw cut

The processing with the saw is a mechanical processing of the material, which results in a significantly lower unintended deformation and increased hardness for the existing structure, such as the thermal cutting. Thus, the machined workpiece has a homogeneous structure even at the edge, which does not change in the continuation of the material.

This circumstance allows immediate finishing of the workpiece with milling or drilling. So it is not necessary to anneal the material or make a similar operation beforehand.

Do you have any questions?

We are happy to answer your questions and make you an offer for these and other materials. Contact us now for more information.

Yoseli Gättner

Your contact person Yoseli Gättner+49 (0) 35263-665-19

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Notice: Specifications contained in following data sheet are provided as a description, liability is excluded!