Products
Characteristics
Designation
Strength
max. 230 HB
(≈ max. 780 N/mm²)
Chemical composition
Thermal conductivity at 100 °C
33 W/(mK)
Character
Steel for through hardening with very good machinability
High wear resistance and low warping
Good dimensional stability, toughness and through hardenability with uniform hardness for cross sections ≤40 mm
Application
Machining
Unusual:
Polishing, etching, nitriding » 1.2379
Suited:
EDM, hard chrome plating
Use
Cavity plates, mould inserts exposed to abrasive stress, cutting punches
Punch backing plates, die plates and guiding plates, guiding rails
Heat treatment
Soft annealing:
680 to 720 °C, about 2 to 5 hours
Slow, controlled cooling inside the furnace of 10 to 20 °C per hour to about 600 °C
Further cooling in air, max. 220 HB
Hardening:
790 to 820 °C
Quenching in oil/hot bath (200 to 250 °C)
Obtainable hardness: 63−65 HRC
Tempering:
Slow heating to tempering temperature (in order to avoid the formation of cracks) immediately after hardening
Tempering twice with intermediate cooling down to 20 °C increases the toughness
Maximum hardness achievable after tempering: 58–60 HRC
Technical tip
Steel grade 1.2510 is an adequate alternative with regards to its properties, machinability and dimensional stability after heat treatment.
