Products
Characteristics
Designation
Strength
max. 240 HB
(≈ max. 820 N/mm²)
Chemical composition
Thermal conductivity at 100 °C
19 /(mK)
Character
Steel for through hardening with good machinability
High wear resistance and low warping
Very good dimensional stability, toughness and through hardenability
Application
Machining
Suited:
Polishing, etching, nitriding, hard chrome plating
Use
Cavity plates and mould inserts as well as cutting punches, punch backing plates and die plates with high requirements on toughness
Heat treatment
Soft annealing:
800 to 840 °C, about 4 to 5 hours
Slow, controlled cooling inside the furnace of 10 to 20 °C per hour to about 650 °C
Further cooling in air, max. 230 HB
Hardening:
950 to 980 °C
Quenching in calm air
Obtainable hardness: 62 HRC
Tempering:
Slow heating to tempering temperature immediately after hardening
Tempering twice is recommended
Rapid cooling following the tempering improves dimensional stability
Maximum hardness achievable after tempering: 58–60 HRC
