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PAPER BASE GRADES
  
GLASS BASE GRADES
SHEETS
PROPERTIES AND
CHARACTERISTICS
Resin
X
XK
XX
FR-1
XXX
XP
XXP
XXXP
XXXP-1R
*XXP-C
*FR-2
 
G-3
G-5
G-7
G-9
G-10, G-11
FR-4
FR-5
GPO-1
GPO-2
GPO-3
Phenolic
  
Phenolic
Melamine
Silicone
Melamine
Epoxy
Polyester
Tensile Strength, psi
Lengthwise
Crosswise

20,000
16,000

16,000
13,000

15,000
12,000

12,000
9,000

11,000
8,500

12,400
9,500

12,400
9,500
 

23,000
20,000

37,000
30,000

23,000
18,500

37,000
30,000

40,000
35,000

12,000
10,000

10,000
9,000

10,000
9,000
Compressive Strength, psi
Flatwise
Edgewise

36,000
19,000

34,000
23,000

32,000
25,500

25,000

25,000

25,000

25,000
  

50,000
17,500

70,000
25,000

45,000
14,000

70,000
25,000

60,000
35,000

30,000
20,000

30,000
20,000

30,000
20,000
‡Flexural Strength, psi (1/8" Thk.)
Lengthwise
Crosswise

25,000
22,000

15,000
14,000

13,500
11,800

14,000
12,000

14,000
12,000

12,000
10,500

12,000
10,500
 

20,000
18,000

44,000
38,000

20,000
18,000

55,000
35,000

50,000
40,000

18,000
18,000

18,000
18,000

18,000
18,000
Modulus of Elasticity in Flexure, psi
Lengthwise
Crosswise

1,800,000
1,300,000

1,400,000
1,100,000

1,300,000
1,000,000

1,200,000
900,000

900,000
700,000

1,000,000
700,000

1,000,000
700,000
 

1,500,000
1,200,000

1,700,000
1,500,000

1,400,000
1,200,000

2,500,000
2,000,000

2,500,000
2,000,000

1,200,000
1,000,000

1,200,000
1,000,000

1,200,000
1,000,000
Shear Strength, psi
12,000
11,000
10,000
8,000
11,000
11,000
11,000
  
18,000
20,000
17,000
20,000
19,000
14,000
14,000
14,000
‡Izod Impact, ft. lbs per inch of notch
Flatwise
Edgewise

4.00
0.50


1.30
0.35


1.00
0.35

-
-

-
-

-
-

-
-
 

6.50
5.50

12.00
5.50

6.50
5.50

-
-

7.00
5.50

8.00
-

8.00
-

8.00
-
‡Bond Strength, lbs.
700
800
950
-
-
-
-
  
850
1570
650
1700
-
850
850
850
 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
Dielectric Strength, VPM
Perpendicular to laminations
Short Time Test
1/16"
1/8"



700
500


700
500


650
470


650
470


700
500


650
470


650
470
 


7000
600


350
260


400
350


400
350


500
400


400
350


400
350


400
350
‡Dissipation Factor, 1 megacycle
Condition A

0.060
0.045
0.038
0.060
0.040
0.038
0.037
  
0.030
0.020
0.003
0.017
0.025
0.030
0.050
0.050
‡Dielectric Constant, 1 megacycle
Condition A

6.00
5.50
5.30
6.00
5.00
4.60
4.60
  
5.50
7.80
4.20
7.20
5.20
4.30
4.50
4.50
Insulation Resistance, megohms
Condition: 96 hrs., 90% relative humidity, 95°F


-
60
1000
-
500
20,000
100,000
  
-
100
200,000
100,000
200,000
-
-
-
‡Arc Resistance, seconds
-
-
-
-
-
-
-
  
-
180
180
180
80
100
100
150
‡Water Absorption, %24 hrs.
1/16"
1/8"
1/2"
6.00
3.30
1.10
2.00
1.30
0.55
1.40
0.95
0.45
3.60
2.20
1.80
1.10
1.00
0.75
0.75
0.55
 
2.70
2.00
1.50
2.70
2.00
1.50
0.55
0.35
0.20
0.80
0.70
0.40
0.35
0.20
0.10
1.00
0.70
0.35
0.80
0.60
0.25
0.60
0.50
0.25
 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
Thermal Conductivity,
Calories/Sec./cm2/°C/cm
7 X 10-4
7 X 10-4
7 X 10-4
7 X 10-4
7 X 10-4
7 X 10-4
7 X 10-4
  
 
12 X 10-4
7 X 10-4
7 X 10-4
7 X 10-4
2 X 10-4
2 X 10-4
2 X 10-4
Rockwell Hardness, M Scale
110
105
110
95
100
105
105***
  
100
120
100
120
110
100
100
100
Specific Gravity
1.36
1.34
1.32
1.33
1.32
1.3
1.3
  
1.65
1.9
1.68
1.9
1.82
1.5
1.5
1.5
Coeff. of Ther. Expansion, Cm/Cm°C
2 X 10-5
2 X 10-5
2 X 10-5
2 X 10-5
2 X 10-5
2 X 10-5
2 X 10-5
  
1.8 X 10-5
1 X 10-5
1 X 10-5
1 X 10-5
1 X 10-5
2 X 10-5
2 X 10-5
2 X 10-5
Maximum Constant Operating
Temperature, °F
225
250
250
250
250
250
250
  
290
300
400
300
‡
265
265
265
Thickness
Minimum
Maximum

0.005"
2"

0.031"
2"

0.031"
2"

0.015"
0.375"

0.015"
0.375"

0.030"
0.375"

0.030"
0.375"
 

0.006"
2"

0.006"
2"

0.006"
2"

0.006"
2"

0.015"
1"

0.031"
2"

0.031"
2"

0.031"
2"
Standard Colors
Natural
(variable
tan) and
Black
Natural
(variable
tan). Also
Black in XX
Natural
(variable
tan) and
Black
Natural
(variable
tan) and
Black
Natural
(variable
tan) and
Black
Natural
(variable
tan)
Natural
(variable
tan)
 
Natural
Grayish
Brown
Natural
(white
to tan)
Grayish
Brown
Natural
(green
to tan)
Various
Various
Various
Standard Finishes
Dull
Glossy
Semi Gloss
Dull
Glossy
Semi Gloss
Dull
Glossy
Semi Gloss
Dull
Glossy
Semi Gloss
Dull
Glossy
Semi Gloss
Dull
Glossy
Semi Gloss
Dull
 
Semi
Gloss
Semi
Gloss
Semi
Gloss
Semi
Gloss
Semi
Gloss
Semi
Gloss
Semi
Gloss
Semi
Gloss
*Cold Punching   ***XXXP-C - 95   ‡G10 and FR4 retain 25% of their flexural strength at 300°F when tested at this temperature.
**Bond Strength, G-10; 2000 lbs.: G-11: 1600 lbs   ***FR-2 - 95   G11 and FR5 retain 50% of their flexural strength at 300°F when tested at this temperature