1.8519 (31CrMoV9) directly from stock & cut to your required dimensions!
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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.
Application
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 Rm | 900 - 1100 N/mm2 |
| Brinell hardness | 284 - 346 HB |
| Yield strength Rp0.2 | > 700 N/mm² |
| Strain | > 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
| 1.8519 31CrMoV9 | C | Si | Mn | P | S | Cr | Mo | Ni | V |
|---|---|---|---|---|---|---|---|---|---|
| min. | 0,27 | 0,4 | 2,3 | 0,15 | 0,1 | ||||
| max. | 0,34 | 0,4 | 0,7 | 0,035 | 0,04 | 2,7 | 0,25 | 0,6 | 0,2 |
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.
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.
Your contact person Sarah Spauschus+49 (0) 35263-665-30spauschus@stahlportal.com
Notice: Specifications contained in following data sheet are provided as a description, liability is excluded!