ČSN 15 330 / 1.8519 / 31CrMoV9
CZK 0
Characteristics
W. Nr. 1.8519 is an alloy steel for quenching and tempering, suitable for nitriding (surface hardness after nitriding up to 800 HV). The steel has limited weldability. It is supplied in the quenched and tempered condition with a hardness of 268–330 HB.
Suitability
Production of valves and fittings, crankshafts, and similar wear-loaded components up to a thickness of 100 mm.
Chemical composition of steel W. Nr. 1.8519
| Steel grade | Chemical composition in % | Hardness in the state | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| soft annealed | heat treated | |||||||||
| C | Si max. | Mn | Cr | Mo | V | P max. | S max. | HB max. | HRC max. | |
| W. Nr. 1.8519 | 0,26-0,34 | 0,40 | 0,40-0,70 | 2,30-2,70 | 0,15-0,25 | 0,10-0,20 | 0,025 | 0,030 | 248 | |
Heat treatment of steel W. Nr. 1.8519
| Way | Temperature [°C] | Procedure | |
|---|---|---|---|
| Soft annealing | 680-720 | Cooling in furnace | |
| Stress relief annealing | 550-580 | Cooling in furnace | |
| Nitriding | 500-520 | ||
| Carbonitriding | 570-580 | ||
| Plasma nitriding in powder | max. 580 | ||
| Hardening | 840-880 | Cooling in water or oil | |
| Tempering | 540-680 | ||
