| 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 |