... extrusion such as rams, bolsters, mandrels, plungers, sleeves, die holders, backing plates, chipping beds, press dies for mould ... parts, deep engraving dies, containers for die casting presses, hot forming dies, bending and heavy embossing ... - 50 HRC, AirHardness after tempering :Tempering °C400500550600HRC50464340Tempering °C400500550600HRC48444138 die: tool steel plate 1.2714 / 5ChNM