Page 39 - CITS - Fitter Trade Practical - Volume -2
P. 39

FITTER - CITS




           1  Depth of indentation under preliminary load (10 kg)
           2  Increase in depth of indentation under additional load (140 kg)
           3  Permanent increase of depth of indentation under preliminary load after removal of
               additional load, the increase being expressed in units of 0002 mm
           4  Rockwell hardness HRC = 100—e

           Rockwell Hardness Testing Schematic


































           Brale is Wilson’s trademark for a diamond penetrator with a conical shape, an included angle of 120 °, and a
           spherical tip with a radius of 0.200 mm, all in accordance with ASTM E 18.
                                                 Hardness data reporting


               Sample No:/part No:
               Material:

               Material Condition :                             As received/ Heat treated

               Indentation type:
               Major load :

               Rough sketch of hardness location:
                                                     Hardness Value

               1
               2

               3
               Average value








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                                            CITS : C G & M - Fitter - Exercise 61
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