Silver steel

Silver steel is a name that is no longer used today for steels with the material number 1.2210 that are alloyed with chromium and vanadium (115CrV3).

properties

Despite its high edge retention, silver steel has a high level of toughness , which is why it is particularly suitable for the production of cutting tools that do not experience high thermal stress ( cold work tool steel ). The desired final hardness can be easily adjusted by tempering .

use

Reamers, milling cutters, thread cutting tools, twist drills, countersinks, punching tools, measuring devices, gauges, mandrels or small, highly stressed shafts are often made from them. Razors were also made from silver steel in the past.

Because of its hardness , which can be easily influenced , it is also suitable for special forging work.

Heat treatment

Soft annealing at 710–750 ° C with slow cooling in the heat.

Hardening temperature when quenching in oil: 810–840 ° C (used for material thicknesses below 8 mm).

Hardening temperature when quenched in water: 780–820 ° C (used for material thicknesses over 8 mm).

The maximum hardness that can be achieved is 64 HRC .

Final hardness that can be achieved by tempering:

100 ° C = HRC 64

200 ° C = HRC 63

250 ° C = HRC 62

300 ° C = HRC 60

Forms of trade

Silver steel is usually only available as drawn round or square bars that have ground and polished surfaces in tolerances according to EN 10278 (formerly DIN standard DIN 175 ) with ISO tolerance field h9.