1.2714 55NiCrMoV7

Properties :
Cr-Ni-Mo alloyed hot work tool steel with high temperature impact toughness and thermal fatigue strength, resistant to repeated shocks, high resistant to tempering, medium wear resistance, oil and air hardening with good through harden-ability, low P and S content, polishable. Suitable for pitting and chrome plating. This grade is produced on request annealed or quenched and tempered condition.

Chemical Composition :

               C       Si      Mn       P      S       Cr     Mo      V      Ni

Min. %  0.50  0.10  0.60                        0.80  0.35   0.05  1.50
Max. % 0.60  0.40  0.90  0.025 0.005    1.20  0.55   0.15  1.80

Heat Treatment :

Annealing : 650 - 700 °C

Hardness after annealing : Max. 248 HB

Stress relieving : Approx. 650 °C

Hot forming : 1100 - 850 °C

Hardening : 830 - 870 °C or 870 - 900 °C

Quenching media : 830 - 870 °C Oil, 870 - 900 °C Air

Hardness after quenching : 52 - 58 HRC, Oil 44 - 50 HRC, Air

Hardness after tempering : 50 HRC 46 HRC, 43 HRC 40 HRC