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Cold Bend Test

Thermal FOR: Insulation $3,060

This test determines the resistance of wire insulation to cracking at low temperatures while being bent around a mandrel. Using a special cold chamber, we can condition the specimen at the low temperatures that can be experienced during flight and study how it reacts to extreme conditions. This is a very good way to determine if the wire sample would be able to survive at these typical temperatures. At the end of the test, we will examine for any visible cracks, then perform a wet dielectric test for assurance.

Procedure

  1. Sample is secured to a rotatable mandrel in a cold chamber and the other end to the load weight.
  2. Condition the wire/cable at -65° ± 2° C for 4 hours unless otherwise specified.
  3. Wrap specimen helically around the mandrel without opening the chamber.
  4. Remove the sample from the cold chamber and return to room temperature.
  5. Perform visual examination of sample.
  6. Perform wet dielectric voltage withstand test.
  7. Report results.

Covered specifications

  • ANSI-NEMA-WC27500 Method 4.3.6
  • AS4373 Method 702
  • AS6070 Method 5.4.1
  • AS22759 Paragraph 5.7.3
  • AS81044 Method 4.7.5.16
  • AS85485 Method 4.7.19
  • BSS7324 Method 7.10
  • EN3475 Method 406
  • FED-STD-228 Method 2021
  • JES292 Method 63
  • J1128 Method 6.6
  • MIL-DTL-17 Method 4.8.19
  • MIL-DTL-24643C Methods 4.8.8 and 4.8.9
  • MIL-DTL-25038J Method 4.6.8
  • MIL-DTL-915 Method 4.5.5
  • MIL-STD-2223 Method 2004
  • MIL-W-81822 Method 4.6.21
  • NEMA HP100.1-1991 Method 7.2.10
  • ISO 6722 Method 5.10
  • AS23053 Rev A Method 5.07.1
  • EN3745 Method 406
  • EN60811 Method 504
  • IS 10810 Method 20
  • J1127 Method 6.05
  • J1128 Method 6.07
  • J2394 Method 6.2.7
  • J2394 Method 6.4.5
  • MIL-C-82621 Method 4.4.4.1
  • MIL-DTL-24643D Method 4.8.07
  • MIL-DTL-24643D Method 4.8.08
  • MIL-M-24041 Method 4.7.3.10
  • NASM 3036 Method 4.4.10
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