1.8519 (31CrMoV9) Material Data Sheet

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1.8519 (31CrMoV9) directly from stock & cut to your required dimensions!

International identifiers
33H3MF, F.1721

The steel 1.8519 is an alloyed, tempered nitriding steel and is characterized by its high wear resistance with its low-ferrite tempering structure. The small amount of alloy of the elements molybdenum and vanadium improves the temper resistance and reduces the sensitivity to temper embrittlement.

The 1.8519 is surface hardenable with an achievable nitriding hardness of 800 HV (Vickers hardness), but very difficult to weld. Flame and induction hardening would also be possible to change the surface hardness as desired. The strength and hardness values ​​achieved by this high-performance steel are stable even under operating conditions up to a little over 500°C.



The material number 1.8519 is used for components in general mechanical engineering and is frequently used in the automotive industry, in valve construction and in plant construction. 1.8519 steel is used for connecting rods or gears and its properties are also ideal for crankshafts. The material 1.7707 (30CrMoV9) is hereby directly comparable in its chemical composition and therefore replaceable.


1.8519 features:

Tensile strength Rm900 - 1100 N/mm2 
Brinell hardness284 - 346 HB
Yield strength Rp0.2> 700 N/mm²

> 11 %

Fracture reduction> 45%

Soft annealing: steel 1.8519 is soft annealed at 680°C - 720°C. This is followed by slow cooling. Here, an annealing hardness of max. 248 HB can be achieved.

Hardening: the hardening process takes place at 840°C - 880°C and is carried out in oil or water.

Tempering: the material number 1.8519 is tempered at 570°C - 680°C with subsequent cooling in the air.

Relaxation: due to changes in the residual stress state due to the mechanical processing, a subsequent stress relieving in the temperature range of 550-580°C is recommended.


Physical Properties:

Density (kg/dm3)7,75 bis 7,85
Elasticity modus (kN/mm²)210
 155  (bei 600°C)
Electrical resistance at 20°C (Ω mm2/m)0,19
Thermal conductivity at 20°C (W/m K)42,5
Specific heat capacity at 20°C (J/kg K)441
Coefficient of thermal expansion (10⁻⁶ m/(m K))12,1  (20°C bis 100°C)
 13,6  (20°C bis 400°C)

Special features:

  • Very high wear resistance

  • High compressive strength with defined toughness and controllable surface hardness

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Chemical composition
min.0,27 0,4  2,30,15   0,1
In stock

Flat, forged, quenched and tempered 

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.

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Sarah Spauschus

Your contact person Sarah Spauschus+49 (0) 35263-665-30

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