17.3 Te* Specimen-brinell hardness tests are made on
peparrd areas and sufrcient metal must be removed from the
surface h eliminate decarburized maal aad oft€r surface
inegularitice. Tts thickn€Bs of the pirxc estd must be suctl
that no bulgo or other marking showing the effet of the load
appears on the side of the piee opposite the indcntation.