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FR-4
Custom FR-4 Machined Parts:

JY machinery is the professional manufacturer of electrical insulating parts FR-4.
Precision further processing and stability guarantee of material have made us became the solver of electric insulation technology project.
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NEMA Grade FR-4(or FR4) material is a epoxy glass fiber cloth laminates (glass fabric reinforced laminates),which is made of alkali-free glass fiber cloth impregnated,bonded with flame resistant epoxy resin through processing at high temperature and pressure as a rigid insulating laminated sheet,Compliance with ROHS requirements.

The features of FR-4:


High mechanical strength
Excellent electrical performance
Excellent fire resistance (UL 94 V-0)
Excellent voltage resistance (electric strength≥16Kv/mm)
Excellent heat resistance (Glass F)

NEMA Grade FR4 glass epoxy laminate properties:


No.

Test Item

Test condition

 Unit

Standard Value

Testing Result

1

Density

ISO 1183

 g/cm3

≥1.70

1.85

2

Moisture Absorption (0.125”)

ASTM D-570

 %

0.15 max

0.10

3

Breakdown Voltage                                      Condition A
(0.062”)                                                       Condition D-48/50

ASTM D-149

 kV

45 min
40 min

66
65

4

Permittivity                                           Condition A
(0.062'')                                                Condition D-48/50

ASTM D-150

‐‐

5.2 max
5.4 max

4.4
4.5

5

IZOD Strength (0.062”)                                Length-Wise
                                                                     Cross-Wise

ASTM D-229

 ft-lb/in
Notched

7.0 min
5.5 min

13
12

6

Flexural Strength (0.062”)                             Length-Wise
                                                                     Cross-Wise

ASTM D-790

 ksi (MPa)

60.0 (414) min
50.0 (345) min

80 (552)
70 (483)

7

Flexural Modulus (0.062”)                             Length-Wise
                                                                     Cross-Wise

‐‐

 ksi (GPa)

‐‐

2,900 (20)
2,600 (18)

8

Tensile Strength (0.125”)                              Length-Wise

ASTM D-638

 ksi (MPa)

‐‐

62 (430)

9

Compressive Strength, Flat-Wise (0.500”)

ASTM D-695

 ksi (MPa)

‐‐

66 (455)

10

Bonding Strength (0.500”)                             Length-Wise
                                                                      Cross-Wise

ASTM D-229

 Lb (kg)

2000 (907) min
1600 (725) min

2,500 (1,133)
1,900 (862)

11

Shear Strength (punch type, 0.062”)

ASTM D-732

 psi (MPa)

‐‐

21,500 (148)

12

Temperature Index

ASTM D-2304

 ℃

‐‐

130

13

Coe_x001D_cient of Thermal Expansion

ASTM E-228

 '/''℃x10-6

‐‐

15

14

Flammability Rating

UL94

 Class

V-I

V-0

15

Dissipation Factor                                 Condition A
(0.062”)                                                Condition D-48/50

ASTM D-150

 ‐‐

0.025 max
0.035 max

0.014
0.015

16

Dielectric Strength (Condition A)

ASTM D-149

 V/mil

‐‐

635

17

Arc Resistance (0.125”)

ASTM D-495

 Sec

‐‐

140

18

Comparative Tracking Index (0.125”)

ASTM D-3638*

 V

‐‐

230


Standard Sheet Size:1020 x 1220mm,1020 x 2440mm,1220 x 2470mm


Popular Applications:
-Military Industry
-Transformer
-New Energy
-Generation Equipment
-Medical apparatus and instruments
-transmission & Distribution
-Switchgear
-Frequency Converter
-Circuit Breaker
-Motor



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