FR-5 vs. Vespel Machining

Comparison of FR-5 and Vespel Property Values

G-11
0.2
43,000
3,000
0.83
--
Material
Water Absorption Rating
Tensile Strength
Flexural Modulus
Coefficient of Linear Thermal Expansion
Dielectric Strength
Unfilled 15% Graphite 40% Graphite 10% PTFE,
15% Graphite
15% Moly
0.24* 0.19* 0.14* 0.21* 0.23*
12,500* 9,500* 7,500* 6,500* 8,200*
-- -- -- -- --
3.0 2.7 2.1 3.0 2.9
560 250 -- -- --

Material Properties

  • High Dielectric Strength
  • Radiation Resistant
  • High Tensile Strength
  • Low Cold Flow Or Creep
  • Chemically Resistant
  • High Flexural Strength
  • Dimensional Stability
  • Low Moisture Absorption
  • Low Dissipation Factor
  • High Impact Strength
  • Cryogenic Serviceability
  • Continuous performance at up to 600°F
  • No special machining equipment required
  • Dimensionally stable
  • Operates at very high PVs
  • Does not become brittle even at subzero temperatures
  • Machinability

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