Delrin vs. FR-4 Machining

Comparison of Delrin and FR-4 Property Values

Acetal Homopolymer Acetal Copolymer
0.25 0.2
10,000 9,800
420 370,000
6.8 6.1
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Material
Water Absorption Rating
Tensile Strength
Flexural Modulus
Coefficient of Linear Thermal Expansion
Dielectric Strength
FR-4
0.1
45,000
2,700
0.66
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Material Properties

  • Low moisture absorption
  • High mechanical strength and rigidity
  • Machinability
  • Extremely high mechanical strength
  • Good dielectric loss properties
  • Good electrical strength properties
  • Machinability

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