1.8515 (31CrMo12) Material Data Sheet
This material belongs to the group of nitriding steels, which due to its chemical composition is also suitable for higher nitriding hardness.
The industries which most common use material 1.8515 are the automotive and mechanical engineering industries. Especially if the application requires surfaces that can withstand high wear.
EU material from stock.
This material is found in general mechanical engineering as well as in the automotive industry or in extrusion technology.
Areas of applications:
Usually, this material is used for extruders, cylinders, racks, but also for connecting rods and other components with a relatively large cross-section.
|Wear resistance||very good|
Hot forming: hot forming, for example: Forging is usually carried out between 1100°C - 900°C.
Soft annealing: The material 1.8515 is annealed at temperatures of 650°C - 700°C. This is followed by a slow cooling. This gives a maximum hardness (Brinell) 248.
Heat treatment: The tempering takes place at 870°C - 930°C, followed by quenching in oil.
Tempering: Temperatures from 580°C to 700°C are required to start the engine.
Nitriding: The material 1.8515 is nitrided at temperatures of 480°C - 570°C.
|Density in kg/dm3||7,73|
|Electrical resistance at 20°C in (Ω mm2)/m||0,19|
|Elasticity modus (103 MPa)||210|
|Thermal conductivity at 20°C in W/(m K)||42|
|Specific heat capacity at 20°C in J/(kg K)||430|
Hardened and tempered
|Yield strength||Elongation||Impact strength||Tensile||Hardness|
|min. 675 N/mm2||min. 10%||min. 25 J||880-1180 N/mm2||276-339 HB|
flat, forged, quenched and tempered
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.
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Notice: Specifications contained in following data sheet are provided as a description, liability is excluded!