What is the depth of penetration for Superficial Rockwell scales?
2012/11/4 18:49:13
A: One Superficial Rockwell number represents a penetration of 0.001 mm or 0.000040 in. Therefore, a reading of 30N80 indicates a penetration from minor to major load of (100 - 80) X 0.001 = 0.020 mm or 0.0008 in. Note: The number 100 used in the calculation is the infinite hardness number used for all Superficial scales.
