(1) Vicker's Hardness Tester (Curve of min.steel sheet by load)
(2) Rockwell Hardness Tester (Measuring condition for proper hardness)
If the crossing of hardness and sheet thickness is on the righe side of the curve, the hardness test may be carried.
The thickness limitation for Hardness testing. (JIS G3311)
Vickers HV |
Minimum thicknee(in m/m) |
Vickers |
Rockwell |
load
0.3kg |
0.5kg |
1kg |
5kg |
10kg |
20kg |
Scale B
load 100kgs |
Scale C
load 150kgs |
350 |
0.06 |
0.08 |
0.11 |
0.24 |
0.35 |
0.49 |
- |
1.40 |
300 |
0.07 |
0.09 |
0.12 |
0.26 |
0.37 |
0.53 |
0.51 |
1.50 |
250 |
0.08 |
0.10 |
0.13 |
0.29 |
0.41 |
0.58 |
0.64 |
1.68 |
200 |
0.08 |
0.11 |
0.14 |
0.32 |
0.46 |
0.65 |
0.81 |
1.83 |
150 |
0.10 |
0.12 |
0.17 |
0.37 |
0.53 |
0.75 |
1.14 |
- |
100 |
0.12 |
0.15 |
0.20 |
0.46 |
0.64 |
0.91 |
1.80 |
- |
| 