ASSAB 618HH steel is of vacuum melted chrome-nickel-molybdenum alloy steel. This steel has been quenched and backfired before leaving factory. It has following advantages:
 no risk of cracking and deforming in heat treatment
 no any cost for heat treatment
 shorten the period of die making
 reduce die’s cost (example: no rectifying and deforming)
 easy to correct die
 Nitrogenized treatment and flame-hardening treatment is allowed to increase side hardness and wear resistance.

Application:
 Large long-life plastic injection dies such as household electric apparatus, computer crust and other dies.
 As is high in hardness, it is used as slide rod for plastic die.
 Thermoplastic pressing dies, blowing dies, forming tools and structure parts

Characteristics:
good properties of machining and polishing