What is 1.6526 (20NiCrMoS2-2)
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.
International identifiers
Properties of the material 1.6526 (20NiCrMoS2-2)
Properties
| Weldability | good |
| Machinability | good |
| Toughness | very good |
| Corrosion resistance | low |
| Wear resistance | good (in the cured state) |
Mechanical properties
Soft annealed: Brinell hardness: < 212 HB
Physical properties
| Density in kg/dm3 | 7,75 |
| 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 |
Processing
| Machinability | is possible |
| Nitriding | is possible |
| Flame hardening | is not possible |
| Induction hardening | is not possible |
Calculate the weight quickly and easily
Heat treatment 1.6526
- Hot forming (e.g. forging): 1100–850 °C
- Subsequent cooling in air
Normalizing
- Temperature: approx. 910 °C
- Subsequent cooling in air
- Improves machinability
- Can be carried out prior to case hardening
Soft Annealing
- Temperature: 650–700 °C
- Slow cooling in the furnace
Quenching and Tempering
- Temperature: 840–870 °C
- Subsequent quenching in oil or in air
Tempering
- Temperature: 200–700 °C
- Improves toughness with only a minor effect on hardness
Chemical composition of 1.6526
| 1.6526 20NiCrMoS2-2 | C | Si | Mn | P | S | Cr | Mo | Ni |
|---|---|---|---|---|---|---|---|---|
| min. | 0,17 | 0,65 | 0,020 | 0,35 | 0,15 | 0,40 | ||
| max. | 0,23 | 0,40 | 0,95 | 0,025 | 0,040 | 0,70 | 0,25 | 0,70 |
Areas of application for 1.6526
Instructions for use
- For light to moderate loads
- When high surface wear resistance is required
- When good core strength is desired
- When good impact toughness is required
- For components requiring a highly wear-resistant surface combined with a tough core
Areas of application
- Camshafts
- Racks
- Guide pins
- Bearings
- Bushings
- Sleeves
Form of supply and availability of 1.6526
In stock
Immediately available from stock
Form of supply
Flat steel, forged, annealed
Sawn blank
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.
Notice: Specifications contained in following data sheet are provided as a description, liability is excluded!