Hardness Scale

-
168 BHN Max
177 to 212 BHN
177 to 212 BHN; Rockwell B88 to 95
188 to 223 BHN; Rockwell B90 to 97
200 to 235 BHN
200 to 235 BHN; Rockwell B94 to 99
220 to 255 BHN; Rockwell B97 to 102
221 to 225 BHN
241 BHN Max
261 to 321 BHN
BHN
BHN; RC
BHN; Rc
BHN; Rockwell
BHN; Rockwell B
Brinell
Brinnell
Not Rated
RC
Rb
Rc
Rockwell