Properties

Unit

Index Value

Fact Value

3240-A

3240-A

Flexural Strength perpendicular to laminations

A: under normal conditions

Mpa

≥340

345

Impact Strength parallel to laminations (Charpy)

KJ/m²

≥33

34.5

Tensile Strength

Mpa

≥300

300

Insulation Resistance after immersion in water (D-24/23)

W

≥5.0×10⁸

5.1×10⁸

Dielectric Strength perpendicular to laminations
(in 90±2 °C transformer oil, 1 mm)

KV/mm

≥10.2

10.4

Breakdown Voltage parallel to laminations
(in 90±2°C transformer oil)

KV

≥35

36.1

Permittivity (50Hz)

≤5.5

5

Permittivity (1MHz)

≤5.5

5.1

Dissipation Factor (50Hz)

≤0.04

0.032

Dissipation Factor (1MHz)

≤0.04

0.032

Water Absorption (D-24/23, 1.6mm

≤mg

34

21.5

Density

g/cm³

(1.70-1.90)

1.9

Color

—

Natural

Natural

Reference Standard

—

GB/T1303.1-1998