Silver Steel is supplied in the annealed condition having an average hardness of 270 brinell (Rockwell C27). Rockwell hardness test. Annealed silver steel has a hardness of 27 on the Rockwell scale of hardness (RHC). “No, actually Hardness 15T Scale was used prior to 1982, as well as currently. The Rockwell scale provides a basis for measuring how well different materials are able to withstand indention when subject to heavy loads. It is defined by the standard ASTM E18. To obtain full wear resisting hardness with toughness silver steel may be heat treated up to a maximum hardness of Rockwell C64.As a Silver … Conversion table/chart for Brinnel and Rockwell hardness scales and tensile strengths. There are three stages to the Rockwell hardness … Buy metals and plastics online in small quantities, cut to order. The hardening process used for silver … The Rockwell test is probably the most commonly used hardness test today, mainly since it is the fastest and most accurate form of testing. We believe the only coin that used the Rockwell Hardness B Scale was the 40% silver (silver clad) Kennedy half dollar from … Using various metal working processes, this alloy is capable of being hardened to 64 RHC. Silver steel can be made with a hardness … According to West York Steel, standard annealed varieties offer a hardness of C27 on the Rockwell hardness scale.