*
Rockwell Scale B (HRB)
I	II	III	IV	V	VI	VII	VIII

Original Hardness (on Edge)
30.7	30.1	34.5	30.6	28.8	28.4	28.5	28.2

Rolled Hardness (on Mark)
64.0	76.0	81.1	83.6	89.6	88.4	89.4	89.4
64.4	75.4	81.0	83.7	88.9	88.9	89.5	88.9
66.0	73.4	79.7	83.9	88.3	88.8	89.5	89.7