Products
Characteristics
Designation
Strength
max. 220 HB
(≈ max. 750 N/mm²)
Chemical composition
Thermal conductivity at 100 °C
33 W/(mK)
Character
Chrome-vanadium alloyed cold-work steel with high wear resistance; also known as silver steel
Application
Machining
Unusual:
Polishing, etching, EDM, nitriding, hard chrome plating
Use
Small turned parts, core pins, punches and engraving tools
Heat treatment
Soft annealing:
710 to 740 °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:
780 to 840 °C
Maintain curing temperature for 15 to 30 minutes
Quenching in water/oil
Obtainable hardness: 64−66 HRC
Tempering:
Slow heating to tempering temperature immediately after hardening
Minimum time in furnace: 1 hour per 20 mm part thickness
Min. 2 hours cooling in air
Technical tip
Silver steel 1.2210 is dispatched ground to h9 tolerance.
