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COHRlastic solid silicone rubber in square sheet and continuous length form has a smooth, blemish-free surface. It is available in degrees of hardness from relatively soft 30 durometer to the relatively hard 70 durometer on the Shore A scale. It is manufactured in different formulations to provide a choice of physical properties and cost considerations.

Series 300-700 COHRlastic generalpurpose molded sheet is available in thicknesses up to 1/2" and it withstands temperatures from –100 °F to +500
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Unit of Measure

Specifications

Dielectric Strength Approx.

500 V/mil

Thermal Conductivity (Average)

4.4 x 10-4 x (cal·cm/ºC·cm·s) 1.3 BTU i./h·ft2 ºF

Specific Heat

0.3 BTU/lb/ºF
Linear Thermal Expansion1 1.5 x 10-4

Width/Sheet Size

36 x 36 in

Color

Red
Thickness2 1/16 ±.016 in1/2 ±.016 in1/4 ±.016 in1/8 ±.016 in3/16 ±.016 in3/32 ±.016 in3/8 ±.016 in5/16 ±.016 in

ZZ-R-765, Class 2a & 2b (Grade)

70

AMS

3304

Test Method Durometer

D2240
Durometer (Shore A ±5)3 70

Test Method Tensile Strength

D412
Tensile Strength4 700 psi

Test Method Elongation

D412
Elongation5 160 %

Test Method Tear Strength

D624
Tear Strength6 60 ppi

Test Method Compression Set

D395
Compression Set after 70 h at 320 ºF7 15 %

Durometer Change (Points, Shore A) after Dry Heat Aging for 70 h at 437 ºF

+5

Tensile Strength Change after Dry Heat Aging for 70 h at 437 ºF

–15 %

Elongation Change after Dry Heat Aging for 70 h at 437 ºF

–15 %

Durometer Change (Points, Shore A) after Immersion in ASTM Oil #1 (High Aniline Point) for 70 H at 302 ºF

–10

Tensile Strength Change after Immersion in ASTM Oil #1 (High Aniline Point) for 70 H at 302 ºF

–10 %

Elongation Change after Immersion in ASTM Oil #1 (High Aniline Point) for 70 H at 302 ºF

–10 %

Volume Change after Immersion in ASTM Oil #1 (High Aniline Point) for 70 H at 302 ºF

+5 %
  • 1 Room temperature to +350 ºF
  • 2 Thickness 3/32 in - special order. Minimum quantities apply.
  • 3 Die B Method B, ASTM D2000 + Fed. Spec. ZZ-R-765.
  • 4 Die B Method B, ASTM D2000 + Fed. Spec. ZZ-R-765.
  • 5 Die B Method B, ASTM D2000 + Fed. Spec. ZZ-R-765.
  • 6 Die B Method B, ASTM D2000 + Fed. Spec. ZZ-R-765.
  • 7 Die B Method B, ASTM D2000 + Fed. Spec. ZZ-R-765.