| Test |
Thickness in mm |
Minimum Samples
required |
Dimension of samples in mm |
| Specific Core loss,A.C.Magnetisation / Permeability,Anisotrophy By Epstein Method |
1.00 |
12 |
*T X 30 x 305
/ 280
(minimum weight must be greater than 400gms) |
| 0.65 |
16 |
| 0.50 |
16 |
| 0.35 |
20 |
| 0.30 |
24 |
| 0.27 |
28 |
| 0.23 |
32 |
| In case of Non-Oriented
half of the samples in the rolling direction and other half in the Transerve
direction. In case of Grain Oriented all samples are in rolling direction. For
all material, the number of samples are always needed in multiple of 4. |
| Surface Insulation Resistivity |
T |
5 |
T X 50 x 125 |
| Stacking Factor |
T |
Weight should
be Min. 1 kg |
T X 30 x 245 |
| Ductility |
T |
10** |
T X 30 x 152 |
| Thermal Effect on coating |
T |
12 |
T X 50 x 125 |
| Resistance to Solvents |
T |
2 |
T X 30 x 125 |
| Resistance to Trichloroethylene |
T |
2 |
T X 30 x 125 |
| Resistance Transformer Oil |
T |
2 |
T X 30 x 125 |
| Resistance to Heat |
T |
12 |
T X 30 x 125 |
| Adherence Test |
T |
2 |
T X 30 x 125 |
| Coating Thickness |
T |
1 |
T X 50 x 125 |
| Mechanical Testing |
T |
2 |
Dumble 20 x
210
radius (20) |
| (YS, TS, % Elongation) |
| Mechanical Testing (Hardness) |
T |
2 |
T X 20 x 20 |
| Chemical Testing (Spectro Analysis) |
T |
2 |
25 x100 |
| Chemical Testing (Leco Analysis) |
T |
5gm |
4 mm x 4 mm |
*T- Thickness
of specimen
** - 5 Rolling & 5 Transverse direction |
| Note: Test Specimens
should be flat, clean and burr, scratch free. |
