Measured
Hardness
Cylinder Diameter
1/4"
(6.4mm)
3/8"
(10mm)
1/2"
(13mm)
5/8"
(16mm)
3/4"
(19mm)
7/8"
(22mm)
1 "
(25mm)
1 1/4"
(32mm)
1 1/2"
(38mm)
Calibration value (Actual hardness = Measured hardness + Calibration value)
20
6.0
4.5
3.5
2.5
2.0
1.5
1.5
1.0
1.0
25
5.5
4.0
3.0
2.5
2.0
1.5
1.0
1.0
1.0
30
5.0
3.5
2.5
2.0
1.5
1.5
1.0
1.0
0.5
35
4.0
3.0
2.0
1.5
1.5
1.0
1.0
0.5
0.5
40
3.5
2.5
2.0
1.5
1.0
1.0
1.0
0.5
0.5
45
3.0
2.0
1.5
1.0
1.0
1.0
0.5
0.5
0.5
50
2.5
2.0
1.5
1.0
1.0
0.5
0.5
0.5
0.5
55
2.0
1.5
1.0
1.0
0.5
0.5
0.5
0.5
0
60
1.5
1.0
1.0
0.5
0.5
0.5
0.5
0
0
65
1.5
1.0
1.0
0.5
0.5
0.5
0.5
0
0
70
1.0
1.0
0.5
0.5
0.5
0.5
0.5
0
0
75
1.0
0.5
0.5
0.5
0.5
0.5
0
0
0
80
0.5
0.5
0.5
0.5
0.5
0
0
0
0
85
0.5
0.5
0.5
0
0
0
0
0
0
90
0.5
0
0
0
0
0
0
0
0
DAEKYUNG TECH & TESTERS Mfg. CO.,LTD
- 14 -
9.2 Reference Table 2.
Calibration value when a cylinder-shaped specimen is tested as C, A, D scales
