1.6526 (20NiCrMoS2-2) Material Data Sheet

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1.6526 (20NiCrMoS2-2) from stock, sawn to your required dimensions!

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

The material 1.6526 is suitable for parts in mechanical engineering which are case hardened. Here, importance is placed on a hard surface and a tough core, as it leads to good wear properties.

From the technical point of view, the materials 1.6526 and 1.6523 are the same, but differ in the sulfur content. This facilitates the machining process.

1.6526 is popularly known as AISI 8620​​​​​.

Areas of applications

If a light to medium load is sufficient for components and a high surface wear resistance with good core strength and impact resistance is necessary, 1.6526 can be used in many industrial sectors.

The material grade 1.6526 is used in the field of camshafts, racks, guide pins, bearings, bushes and sleeves.

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

Hot forming: hot working (for example, forging) should be carried out between 1100°C - 850°C. Subsequently, cooling takes place in the air.

Heat treatment

Normalizing: Normalizing is carried out at a temperature of approx. 910°C, followed by cooling in air. Thereby, the workability can be improved. Before case hardening, normalizing can be performed.

Soft annealing: Soft annealing is carried out at temperatures of 650°C - 700°C, with a slow cooling in the oven.

Tempering: The material 1.6526 can be tempered at 840°C - 870°C and is then quenched in oil or in the air.

Tempering: At 200°C - 700°C, a tempering treatment can be performed to improve toughness with minimal impact on hardness.


Machinabilityis possible
Nitridingis 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 (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 0,0200,350,150,40
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!