|
BALL SIZE →
MATERIAL ↓ |
BELOW
6.00 MM |
ABOVE
6.00 MM |
AISI-E-52100
|
81
TO 85 HRA |
60
TO 67 HRC |
|
AISI-1085 |
81
TO 85 HRA |
60
TO 67 HRC |
|
AISI-420 |
75
Min HRA |
48
Min HRC |
|
AISI-420C |
78
Min HRA |
55
Min HRC |
|
AISI-440C |
81
TO 85 HR |
60
TO 67 HRC |
Note :
Hardness readings of balls taken on the spherical surface gets affected due to the curvature. Hence correction factor have been decided which when added to the readings taken on ball curvature, gives the equivalent effect of hardness value as if taken on a flat surface .