Silver Steel

For tool room and general engineering. Applications include screwdrivers, punches, shafts, axles, pinions, pins, die posts, instrument parts, model parts, taps and drills for mild steel, engraver tools. High carbon content means that it can be hardened to give high wear resistance and chromium content adds strength and hardness.

Manufactured from
BS1407:1970 grade steel.

Typical hardness:
207-237HB with 285HB maximum.

Tensile strength:
45/55 T.P.S.I. (700/850 N/mm2).

Surface finish:
Better than 0.6 microns (25 micro inch) CLA (Centre Line Average).

Chemical analysis range:
Carbon 0.95 - 1.25%
Silicon 0.40% max
Manganese 0.25 - 0.45%
Phosphorous 0.045% max
Sulphur 0.045% max
Chromium 0.35 - 0.45%

Chemical analysis typical:
Carbon 1.13%
Silicon 0.22%
Manganese 0.37%
Phosphorous 0.014%
Sulphur 0.018%
Chromium 0.43%

Metric round sizes

Tolerances:
Up to 25mm plus 0 - 0.012mm.
Over 25mm up to and including 50mm plus 0 - 0.0250mm.