MIL-DTL-3432J
APPENDIX B
B.2.11 Jacketing compound, type JN moderate low temperature, chloroprene rubber (CR).
Unaged:
Tensile strength, minimum psi
1800
Elongation, minimum %
300
Set, maximum inch
.375
Tensile stress, (200% elongation, minimum psi)
500
After 95 ± ½ hour oxygen bomb aging at 70°C:
Tensile strength, minimum % of original
75 (but not less than 1600 psi)
Elongation, minimum % of original
65 (but not less than 250 psi)
Ozone resistance (after air oven conditioning and
168 ± 1 hour in ozone) at 120°F
no visible cracks
Brittleness temperature, unaged, max.°C
-40
After aging, max.°C
-40
After oil immersion:
Tensile strength, minimum % of original
60
Elongation, minimum % of original
60
B.2.12 Jacketing compound, type JN-L low temperature, chloroprene rubber (CR).
Unaged:
Tensile strength, minimum psi
1500
Elongation, minimum %
300
Set, maximum inch
.375
Tensile stress, (200% elongation, minimum psi)
500
Tear resistance, minimum lb-in
20
After 95 ± ½ hour oxygen bomb aging at 70°C:
Tensile strength, minimum % of original
75
Elongation, minimum % of original
75
After 168 ± 1 hour air oven aging at 70°C:
Tensile strength, minimum % of original
80
Elongation, minimum % of original
80
Ozone resistance (after air oven conditioning and
168 ± 1 hour in ozone) at 120°F
no visible cracks
Brittleness temperature, unaged, max. °C
-55
After aging, max. °C
-55
Torsional stiffness ratio, max
30
After oil immersion:
Tensile strength, minimum % of original
60
Elongation, minimum % of original
60
36
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business