• Specialist Manufacturer and Stockholder of Genuine BS 1407 Precision Silver Steel.
  • Extremely comprehensive range of finished Silver Steel stock items - we aim to despatch all orders within 24 hours of receipt.
  • As a manufacturer of Silver Steel, non standard diameters can be produced to customers specific requirements. Price available upon application.
  • Extensive range available to buy securely online today.

Genuine BS1407 Silver Steel

Silver Steel is a versatile high carbon tool steel is ground to very close tolerances.  It is so called because of its highly polished appearance created by the extremely fine surface finish.  The high carbon content of this BS1407 silver steel means that it can be hardened to give considerable wear resistance and the chromium content increases strength and hardenability.  It is readily machinable as supplied in the spheroidised annealed condition. The material as delivered shall have a hardness of not more than 285HB when measured in accordance with BS240*

Silver Steel BS1407 Packaging

All 1 metre, 2 metre and 3 metre lengths are packaged in stout cardboard tubes to prevent any damage in transit.

All 333mm or 13" lengths are boxed in polycarbonate lined boxes for further protection.

All BS1407 Silver Steel pieces are coated in a lanolin solution to protect against corrosion.

 

Silver Steel BS1407 Chemical Composition

  Analyis Range (%) Typical Analysis (%)
C .95/1.25 1.13
Si .40 max. .22
Mn .25 / .45 .37
P .045 max .014
S .045 max. .018
Cr Cr. .35 / .45 .43

 

Silver Steel BS1407 Size Range

  Metric Imperial
Diameter Range: 2mm - 50mm 1/16" - 2"

Supplied In: Boxes, 1 metre, 2 metre and 3 metre lengths

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Silver Steel BS1407 Tolerance / Surface Finish

Diameter Tolerance
< 1" ± 0.00025"
1" < 2" ± 0.0005"
< 25mm + 0/-0.015mm
25mm < 50mm + 0/-0.025mm

The surface finish is better than 25µ inch (0.6 microns) cla.

 

Silver Steel Hardening

Heat slowly to 760 - 800°C using the upper end of the temperature range for lower carbon contents and lower end of temperature range for higher carbon contents.  Austenitize until the temperature is uniform.  Quench into well agitated water.

The approximate quench hardness is 65 to 69 Rc.

 

tempering temperature hardness graph

 

Silver Steel Tempering

Temper immediately after hardening preferably before the tool reaches room temperature.  Temper for a minimum of 1 hour at temperatures between 180 - 350°C, dependent upon the final hardness required.