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MIL-PRF-46846 Rubber, Synthetic, Heat - ShrinkableThis specification covers the type and class requirements for extruded tubing, molded parts, and extruded shapes that are flexible, electrical insulating and whose dimensions will reduce to a predetermined size upon the application of heat.

Pages 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10 - 11 - 12


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MIL-PRF-46846D
TABLE III. Physical, electrical, and chemical properties of synthetic rubber molded parts and extruded shapes, class 2.
Conditioning (see 4.4.2.3)
Requirement
Property
Type
Type
Type
Type
Type
Type
Type
Type
Type
Type
Method
I
II
III
IV
VI
I
II
III
IV
VI
A
A
A
A
A
Expansion 150
Expansion 250
Expansion 200
Expansion 150
Expansion 275
Paragraph 4.5.2
Elastic Memory, percent,
Retraction 90
Retraction 90
Retraction 90
Retraction 90
Retraction 93
minimum
Tensile Strength, psi, minimum
1500
600
1800
1200
1600
ASTM D412,
Die D
750
600
1200
1000
750
Tensile Stress at 100 percent
ASTM D412,
Die D
elongation, psi, maximum
Elongation, percent, minimum
200
200
300
250
450
ASTM D412,
Die D
Specific Gravity, maximum
1.50
1.35
1.95
1.40
1.25
ASTM D792
78 5
83 5
85 5
90 5
85 5
Hardness, Shore A
ASTM D2240
A
A
A
A
A
E4/-67
E4/-104
E4/-87
E4/-67
E4/-103
Low Temperature
Pass or Fail
Pass or Fail
Pass or Fail
Pass or Fail
Pass or Fail
ASTM D746
No dripping, flowing, or cracking --------------------------------
Heat Shock
Paragraph 4.5.4
E4/302
E4/432
E4/572
E4/572
E4/437
Paragraph 4.5.5
Heat Aging, followed by tests
for:
1200
480
1200
1000
1500
E96/212
E96/347
E168/482
E96/302
E168/302
Tensile Strength, psi,
ASTM D412,
minimum
Die D
150
120
250
100
150
E96/212
E96/347
E168/482
E96/302
E168/302
Elongation, percent,
ASTM D412,
minimum
Die D
200
200
200
100
225
ASTM D876
A
A
A
A
A
Dielectric Strength, volts/mil,
minimum
1 X 108
1 X 1010
1 X 1010
1 X 1010
1 X 1011
ASTM D257
Volume Resistivity,
ohm-
cm, minimum
Self-Extinguishing
Flammability
---
Self-Extinguishing
ASTM D635
Rating of 0 -------------------------------------------------
Fungus Resistance
ASTM G21
A
A
A
A
A
1.0
1.0
0.5
0.5
1.0
E24/77
E24/77
E24/77
E24/77
E24/77
Water Absorption, percent,
ASTM D570,
maximum
Procedure A
Paragraph 4.5.6
Solvent Resistance, followed
by tests for:
900
400
1500
1200
600
E24/77
E24/77
E24/77
E1/77
E24/77
Tensile strength, psi,
minimum
ASTM D412,
120
120
300
250
200
Die D
Elongation, percent,
E24/77
E24/77
E24/77
E1/77
E24/77
minimum
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