Table 1

mm

Width x Length,

mm

Deviation

980 x 1980

+/-25

1220 x 2440

1.2.2 Thickness and allowed deviation of Sheets (see Table 2)

Table 2

mm

Nominal thickness

Deviation

Nominal thickness

Deviation

0.5

+/-0.12

10

+/-0.80

0.8

+/-0.12

12

+/-0.90

1.0

+/-0.15

14

+/-1.00

1.2

+/-0.18

16

+/-1.10

1.5

+/-0.22

20

+/-1.30

2.0

+/-0.25

25

+/-1.40

2.5

+/-0.30

30

+/-1.50

3.0

+/-0.35

35

+/-1.70

4.0

+/-0.40

40

+/-1.90

5.0

+/-0.50

45

+/-2.10

6.0

+/-0.60

50

+/-2.30

8.0

+/-0.70

1.3 Bending Deflection for Sheets (see Table 3)

Table 3

mm

Thickness, mm

Bending Deflection

1000mm(Ruler length)

500mm(Ruler length)

3.0~6.0

≤10

≤2.5

>6.0~8.0

≤8

≤2.0

>8.0

≤6

≤1.5

No.

Properties

Units

Standard Values

Typical Values

1

Flexural Strength,

At room temp

MPa

≥400

669

perpendicular to laminations

At 180oC+/-5oC

≥280

490

2

Impact strength, Charpy, notch,lateral

KJ/m2

≥50

70

3

Voltage endurance, perpendicular to laminations,

KV

26

passed

in transformer oil, at 90+/-2oC, 1min,2mm sheet

4

Voltage endurance, parallel to laminations,

KV

≥35

passed

in transformer oil, at 90+/-2oC,1min

5

Insulation resistance, parallel to laminations,

Ω

≥1.0x108

6.5x109

after immersion

6

Dielectric dissipation factor

1MHz, after immersion

-

≤0.03

0.009

7

Relative permittivity,

1MHz, after immersion

-

≤5.5

4.6

8

Water absorption, 2mm sheet

Mg

≤32

26

9

Flammability

grade

BH2

passed

10

Temperature Index (TI)

-

≥200

195