Material Data Sheet
Material: NEMA Grade G - 7
Grade G-7 is constructed from a continuous filament woven glass fabric with a silicone resin binder. The resin system is flame retardant and arc resistant. Extremely good dielectric loss properties under dry conditions and good electrical properties under humid conditions, although the percentage of change from dry to humid conditions is high. Excellent flame, heat, and arc resistance. Meets UL94, Class V0, flame resistance.
This material is flame and arc resistant and exhibits excellent high temperature properties. It is designed for mechanical support in electrical equipment applications. This material is available in sheets and round rolled tubes.
| Physical Properties | Value | Units | ||
| Density | 0.07 | lb/in³ | ||
| Water Absorption | 0.03 | % | ||
| Mechanical Properties | ||||
| Hardness, Rockwell M | 105 | |||
| Tensile Strength @ Break Crosswise | 20,500 | psi | ||
| Tensile Strength @ Break Lengthwise | ---- | psi | ||
| Flexural Modulus Crosswise | ---- | ksi | ||
| Flexural Modulus Lengthwise | 25,000 | ksi | ||
| Flexural Strength Crosswise | ---- | psi | ||
| Flexural Strength Lengthwise | 25,000 | psi | ||
| Compressive Strength | 41,000 | psi | ||
| Izod Impact, Notched Crosswise | 13 | ft-lb/in | ||
| Izod Impact, Notched Lengthwise | ---- | ft-lb/in | ||
| Electrical Properties | ||||
| Dielectric Constant | 4.2 | |||
| Dielectric Strength | 350 | V/mil | ||
| Dissipation Factor | 0.01 | |||
| Arc Resistance | 240 | sec | ||
| Thermal Properties | ||||
| CTE, linear 68°F | 7.2 | µin/in-°F | ||
| CTE, linear 20°C Transverse to Flow | 9 | µin/in-°F | ||
| Thermal Conductivity | 2 | BTU-in/hr-ft²-°F | ||
| Maximum Service Temperature, Air | 428° | °F | ||
| Flammability, UL94 | HB | |||
| *The values shown in these and the following charts are typical, average properties. Actual values may differ due to variations in resin formulations and processing methods. These values are obtained from sources believed to be reliable, including the resin manufactures, converters and other published sources. However, they should not be used for specification or design purposes. |
copyright © 2008 Tamshell Corp. / all rights reserved
