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Properties G10 FR4 G11 FR5 G9 G7 X XX XXX C/CE L/LE
  Glass Reinforced Glass Reinforced Melamne Silicone Glass Paper Paper Paper Canvas Linen
Tensile Strength                  
•Lengthwise, PSI 40,000 40,000 37,000 23,000 20,000 16,000 15,000 9,500 12,500
•Crosswise, PSI 35,000 35,000 30,000 18,000 16,000 13,000 12,000 7,500 88,750
Compressive Strength G10 FR4 G11 FR5 G9 G7 X XX XXX C/CE L/LE
•Flatwise, PSI 60,000 60,000 70,000 45,000 36,000 34,000 32,000 37,000 37,000
•Edgewise, PSI 35,000 35,000 25,000 14,000 19,000 23,000 25,500 23,500 25,000
Flexural Strength                  
•Lengthwise, PSI 55,000 55,000 55,000 23,000 25,000 15,000 13,500 17,000 15,000
•Crosswise, PSI 45,000 45,000 35,000 20,000 22,000 14,000 11,800 15,000 13,750
Modulus of Elasticity in Flex G10 FR4 G11 FR5 G9 G7 X XX XXX C/CE L/LE
•Lengthwise, PSI 2,700,000 2,700,000 2,500,000 1,400,000 1,800,000 1,400,000 1,300,000 950,000 1,050,000
•Crosswise, PSI 2,200,000 2,200,000 2,000,000 1,200,000 1,300,000 1,100,000 1,000,000 850,000 850,000
Shear Strength, PSI 19,000 19,000 20,000 17,000 12,000 11,000 10,000 11,500 11,750
Izod Impact G10 FR4 G11 FR5 G9 G7 X XX XXX C/CE L/LE
•Flatwise, ft lb per inch of notch 7 7 12 8.5 4 1.3 1 3.2, 2.3 2.5, 1.8
•Edgewise, ft lb per inch of notch 5.5 5.5 8 7.5 0.5 0.35 0.35 1.9, 1.4 1.1, 1
Rockwell Hardness (M Scale) 110 110 120 100 110 105 110 104 105
Specific Gravity 1.82 1.82 1.9 1.68 1.36 1.34 1.32 1.35 1.34
Coefficient of Thermal Expansion G10 FR4 G11 FR5 G9 G7 X XX XXX C/CE L/LE
•cm/cm/ deg C x 10 -5 0.9 0.9 1 1 6 2 1.4 2 2
Water Absorption G10 FR4 G11 FR5 G9 G7 X XX XXX C/CE L/LE
•.062" Thick, % per 24 hrs 0.25 0.25 0.8 0.3 6 2 1.4 2.2 2.5
•.125" Thick, % per 24 hrs 0.15 0.15 0.7 0.2 3.3 1.3 0.95 1.6 1.6
•.500" Thick, % per 24 hrs 0.1 0.1 0.4 0.15 1.1 0.55 0.45 0.75 0.7
Dielectric Strength, volt/mil G10 FR4 G11 FR5 G9 G7 X XX XXX C/CE L/LE
•Perpendicular to Laminations; short                  
  •.062" Thick 500 500 400 400 700 700 650 200/500 200/500
  •.125" Thick 400 400 350 350 500 500 470 150/360 150/360
Dissipaton Factor G10 FR4 G11 FR5 G9 G7 X XX XXX C/CE L/LE
•Condition A, 1 megacycle 0.025 0.025 0.017 0.003 0.06 0.045 0.038 .1, .055 .1, .055
Dielectric Constant G10 FR4 G11 FR5 G9 G7 X XX XXX C/CE L/LE
•Condition A, 1 megacycle 5.2 5.2 7.12 4.2 6 5.5 5.3 5.8 5.8
Insulation Resistance G10 FR4 G11 FR5 G9 G7 X XX XXX C/CE L/LE
•Condition, 96 hrs at 90% relative humidity (in mega ohms) 200,000 200,000 10,000 200,000  -  -  -  -  -
Flame Resistance                  
•Underwriter Labs, Classification 94V-O 94V-O 94V-O 94V-O 94HB 94HB 94HB 94HB 94HB
Bond Strength, in lbs 2,000 16,000 1,700 650 700 800 950 1,800 1,600
Maximum Continuous Operating Temperature G10 FR4 G11 FR5 G9 G7 X XX XXX C/CE L/LE
•All Phenolics can withstand -100F 285°F 300°F 285°F 465°F 285°F 285°F 285°F 265°F 265°F