SPECIFICATION RT-218 ISSUE 4 Page 7
If this document is printed it becomes uncontrolled. Check for the latest revision.
TABLE 3
Requirements
PROPERTY UNIT REQUIREMENT TEST METHOD
PHYSICAL
Dimensions
Inches (mm)
In accordance with Table 1
Section 4.3.1
Longitudinal Change Percent +0, -10 maximum ASTM D 2671
Tensile Strength psi (kPa) 5000 minimum (34,300) Section 4.3.2
Ultimate Elongation Percent 200 minimum ASTM D 2671
Secant Modulus psi(kPa) 8 x 10
4
minimum (5.5 x 10
5
) Section 4.3.3
ASTM D 2671
Specific Gravity 1.9 maximum ASTM D 792
Low Temperature Flexibility
4 hours at -55 ± 2ºC (-67 ± 4ºF)
--- No cracking Section 4.3.4
ASTM D-2671
Heat Shock 4 hours
300 ± 5ºC(572 ± 9ºF)
--- No dripping, flowing, or cracking Section 4.3.5
ASTM D-2671
Heat Resistance
168 hours at 225 ± 5ºC (437 ± 5ºF)
Followed by test for:
--- --- Section 4.3.6
Tensile Strength psi (kPa) 3000 minimum (20.600)
Ultimate Elongation Percent 150 minimum
Vacuum Outgassing
TML (Total Mass Loss)
VCM (Volatile Condensable
Material)
Percent
Percent
1.0 maximum
0.1 maximum
Section 4.3.10
ELECTRICAL
Dielectric Strength
Volts/mil
(Volts/mm)
600 minimum (23,500)
Section 4.3.7
ASTM D 149
Volume Resistivity ohm-cm 10
12
minimum ASTM D 257
CHEMICAL
Corrosive Effect Copper Mirror
16 hours at 200 ± 3ºC (392 ± 5ºF)
---
Non Corrosive
Section 4.3.8
ASTM D 2671
Flammability
Average Time of Burning
Seconds
Pass, VW-1 rating
15 maximum and self-
extinguishing
Section 4.3.9.1
U.L.Subj. 224
Section 4.3.9.2
ASTM D 876
Fungus Resistance --- Rating of 1 or less ASTM G 21
Fluid Resistance
24 hours at 23 ± 3ºC (73 ± 5ºF)
JP-4 Fuel (MIL-T-5624)
Skydrol* 500
Hydraulic Fluid (MIL-H-5606)
Aviation Gasoline 100/130
(MIL-G-5572)
Salt Water (5% salt)
Anti-icing Fluid(MIL-A-8243)
Lubricating Oil (MIL-L-7808)
Followed by tests for:
Section 4.3.11
Dielectric Strength
Volts/mil
(Volts/mm)
600 minimum (23,500) Section 4.3.7
ASTM D 149
Tensile Strength psi (kPa) 2000 minimum (13.720) Section 4.3.2
ASTM D 2671
* Trademark, Monsanto Company
