301A514-50-0 (833320-000) - Tyco Electronics

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CI&PP or Wire and Harnessing Products

305 Constitution Drive, Menlo Park, CA 94025

Specification: RT-1313

This Issue : Issue 7

Date: Oct 6, 2005

Replaces: Issue 6

Tyco Modified Fluoroelastomer Molded Components

Flame Resistant, Flexible, Heat-Shrinkable

1.0 Scope

This specification covers the requirements for one type of flexible, electrical insulating

molded component whose expanded dimensions will reduce to a predetermined size upon

the application of heat in excess of 175°C (347°F).

2.0 Applicable Documents

This specification takes precedence over documents referenced herein. Unless otherwise

specified, the latest issue of referenced documents applies. The following documents

form a part of this specification to the extent specified herein.

2.1 Government-Furnished Documents

Federal

A-A-59133 Commercial Item Description Cleaning Compound, High Pressure

(Steam) Cleaner

A-A-52557 Fuel Oil, Diesel, for Posts, Camps and Stations

Military

MIL-DTL-83133 Turbine Fuels, Aviation, Kerosene Types, Nato F-34 (JP-8), Nato F-35

and JP-8+100

SAE-AMS-1424 Anti-Icing and Deicing-Defrosting Fluid

MIL-PRF-46170 Hydraulic Fluid, Rust Inhibited Fire Resistant, Synthetic Hydrocarbon

Base

2.2 Other Publications

American Society for Testing and Materials (ASTM)

D 149 Standard Methods of Tests for Dielectric Breakdown Voltage and Dielectric

Strength of Electrical Insulating Materials at Commercial Power Frequencies

D 257 Standard Methods of Test for D-C Resistance or Conductance of Insulating

Materials

D 412 Standard Method of Tests for Rubber Properties in Tension

D 570 Standard Methods of Test for Water Absorption of Plastics

D 632 Standard Specification for Sodium Chloride

D 635 Standard Methods of Test for Rate of Burning and/or Extent and Time of

Burning of Self- Supporting Plastics in a Horizontal Position

D 792 Standard Methods of Test for Specific Gravity and Density of Plastics by

Displacement

D 2240 Standard Method of Tests for Rubber Property -- Durometer Hardness

SPECIFICATION RT-1313 ISSUE 7 Page 2

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D 2671 Standard Methods of Testing Heat Shrinkable Tubing for Electrical Use

D 4814 Automotive Spark-Ignition Engine Fuel Std. Spec. for

G 21 Recommended Practice for Determining Resistance of Synthetic Polymeric

Materials to Fungi

ANSI/ASQC Z1.4 Sampling Procedures and Tables for Inspection by Attributes

(Copies of ASTM Publications may be obtained form the American Society for Testing

and Materials, 1916 Race Street, Philadelphia, Pennsylvania 19103.)

3.0 Requirements

3.1 Material

The molded components shall be fabricated from a crosslinked, thermally stabilized,

flame-resistant, modified fluoroelastomer. They shall be homogeneous and essentially

free from flaws, defects, pinholes, bubbles, seams, cracks and inclusions.

3.2 Color

The molded components shall be black.

3.3 Properties

The molded components and the material from which they are fabricated shall meet the

requirements of Table 1.

4.0 Quality Assurance Provisions

4.1 Classification Of Tests

4.1.1 Qualification Tests

Qualification tests are those performed on molded slabs and components submitted for

qualification as satisfactory products and shall consist of all tests listed in this

specification.

4.1.2 Acceptance Tests

Acceptance tests are those performed on molded slabs and components submitted for

acceptance under contract. Acceptance tests shall consist of the following: dimensions,

dimensional recovery, tensile strength, ultimate elongation, heat shock and flammability.

4.2 Sampling Instructions

4.2.1 Qualification Test Samples

Qualification test samples shall consist of six molded slabs, 6 x 6 x 0.075 ± 0.010 inches

(152 x 152 x 1.9 ± .25 mm) and the number of molded components specified. The molded

slabs shall be fabricated from the same lot of material and shall be subjected to the same

degree of crosslinking as the molded components.

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4.2.2 Acceptance Test Samples

Acceptance test samples shall consist of specimens cut from a molded slab 6 x 6 x 0.075

± 0.010 inches (152 x 152 x 1.9 ± .25 mm) and molded components selected at random in

accordance with MIL-STD-105, inspection Level S-2, AQL 6.5 percent. The molded slab

shall be fabricated from the same lot of material and shall be subjected to the same

degree of crosslinking as the molded components. A lot of components shall consist of all

molded components from the same lot of material, from the same production run and

offered for inspection at the same time.

4.3 Test Procedures

4.3.1 Dimensional Recovery

Samples of molded components, as supplied, shall be measured for dimensions in

accordance with ASTM D 2671. The samples then shall be conditioned for 10 minutes in

a 200 ± 5°C (392 ± 9°F) oven or equivalent, cooled to room temperature and remeasured.

4.3.2 Elastic Memory

A 6 x 1/8 inch (152 x 3.2 mm) specimen cut from a molded slab shall be marked with two

parallel gauge lines 1 inch (25 mm) apart in the central portion of the specimen. The

distance between gauge lines shall be recorded as the original length. A 2 inch (51 mm)

portion of the specimen including both gauge lines then shall be heated for 5 minutes in a

200 ± 5°C (392 ± 9°F) oven or equivalent, removed from the oven and stretched within

10 seconds, until the gauge lines are 4 inches (102 mm) apart. The extended specimen

shall be cooled to room temperature and released from tension. After 24 hours at room

temperature, the distance between the gauge lines shall be measured and recorded as the

extended length. The portion of the specimen including both gauge lines then shall be

reheated for 5 minutes in a 200 ± 5°C (392 ± 9°F) oven or equivalent and the distance

between gauge lines then shall be measured and recorded as the retracted length.

Expansion and retraction shall be calculated as follows:

E = Le - Lo

Lo x 100

R = Le - Lr

Le - Lo x 100

Where: E = Expansion (percent)

R = Retraction (percent)

Lo = Original Length [inches (mm)]

Le = Extended Length [inches (mm)]

Lr = Retracted Length [inches (mm)]

SPECIFICATION RT-1313 ISSUE 7 Page 4

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4.3.3 Tensile Strength, Tensile Stress and Ultimate Elongation

Three specimens cut from a molded slab using Die D of ASTM D 412 shall be tested for

tensile strength, tensile stress and ultimate elongation in accordance with ASTM D 412.

4.3.4 Low Temperature Flexibility

Three 6 x 1/4 inch (152 x 6.3 mm) specimens cut from a molded slab shall be

conditioned, along with a 3/8 inch (9.5 mm) mandrel, in a cold chamber at -65 ± 5°C (-85

± 9°F) for 4 hours. After completion of the conditioning and while still in the cold

chamber, each specimen shall be bent around the mandrel through not less than 360

degrees within 10 ± 2 seconds. The specimens then shall be visually examined for cracks.

4.3.5 Heat Shock

Three 6 x 1/4 inch (152 x 6.3 mm) specimens cut from a molded slab shall be conditioned

for 4 hours in a 225 ± 5°C (437 ± 9°F) mechanical convection oven with an air velocity

of from 100 to 200 feet (30 to 60 m) per minute past the specimens. After conditioning,

the specimens shall be removed from the oven, cooled to room temperature and bent

through 360 degrees over a 3/8 inch (9.5 mm) diameter mandrel. The specimens then

shall be visually examined for evidence of dripping or cracking.

4.3.6 Heat Aging

Three specimens, prepared and measured in accordance with 4.3.3 shall be conditioned

for 168 hours in a 150 ± 3°C (302 ± 5°F) mechanical convection oven with an air

velocity of 100 to 200 feet (30 to 60 m) per minute past the specimens. After

conditioning, the specimens shall be removed from the oven, cooled to room temperature,

tested for tensile strength and ultimate elongation in accordance with 4.3.3.

4.3.7 Fluid Resistance

Six specimens prepared and measured in accordance with 4.3.3 shall be completely

immersed in each of the test fluids listed in Table 1 for 24 hours at the temperature

specified. The volume of the fluid shall be not less than 20 times that of the specimens.

After conditioning, the specimens shall be lightly wiped and then air-dried for 45 ± 15

minutes at 23 ± 3°C (73 ± 4°F). The three specimens intended for the tensile strength and

elongation tests shall then be tested for tensile strength and ultimate elongation in

accordance with 4.3.3. The other three specimens shall be weighed before and after

immersion and the weight change calculated as a percent.

4.4 Rejection And Retest

Failure of any sample to comply with any one of the requirements of this specification

shall be cause for rejection of the lot represented. Material which has been rejected may

be replaced or reworked to correct the defect and them resubmitted for acceptance.

Before resubmitting, full particulars concerning the rejection and the action taken to

correct the defect shall be furnished to the inspector.

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5. Preparation For Delivery

5.1 Packaging

Packaging of molded components shall be in accordance with good commercial practice.

The shipping container shall be not less than 125 pound test fiberboard.

5.2 Marking

Each molded component shall be distinctly identified on the part and/or package with the

manufacturer’s name or symbol, the part number, batch number, date of manufacture and

use before date.

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TABLE 1

Requirements

PROPERTY UNIT REQUIREMENTS TEST METHOD

PHYSICAL

Dimensions

inches (mm)

In accordance with applicable

specification control drawing

Section 4.3.1

ASTM D 2671

Dimensional Recovery inches (mm) In accordance with applicable

specification control drawing

Elastic Memory Percent 200 minimum expansion;

90 minimum retraction Section 4.3.2

Tensile Strength psi (MPa) 2200 (15.2) minimum Section 4.3.3

Tensile Stress at 100% elongation psi (MPa) 1200 (8.3) maximum

Ultimate Elongation Percent 350 minimum ASTM D 412

Specific Gravity --- 1.5 maximum ASTM D 792

Hardness Shore A 85 ± 10 ASTM D 2240

Low Temperature Flexibility

4 hours at -65 ± 5°C (-85± 9°F) No cracking Section 4.3.4

Heat Shock

4 hours at 225 ± 5°C (437 ± 9°F) --- No dripping, flowing or cracking Section 4.3.5

Heat Aging

168 hours at 150 ± 3°C (302 ± 5°F)

Followed by tests for:

--- --- Section 4.3.6

Tensile Strength psi (MPa) 2000 (13.8) minimum Section 4.3.3

Elongation Percent 300 minimum

ELECTRICAL

Dielectric Strength

Volts/mil

(kV/mm)

200 (7.9) mi nimum

ASTM D 149

Volume Resistivity ohm-cm 1010 minimum ASTM D 257

CHEMICAL

Flammability

Average Time of Burning

Seconds

120 maximum

ASTM D 635

Average Extent of Burning inches (mm) 1.0 (25) maximum

Fungus Resistance --- Rating of 1 or less ASTM G 21

Water Absorption

24 hours at 23°C (73°F) Percent 1.0 maximum ASTM D 570

Fluid Resistance

24 hours at 25 ± 3°C (77 ± 5°F) in:

Cleaning Compound (A-A-59133)

Gasoline Automotive (ASTM D 4814)

JP-8 Fuel (MIL-DTL-83133)

--- --- Section 4.3.7

Water

Followed by tests for:

Tensile Strength psi (MPa) 1800 (12.4) minimum Section 4.3.3

Ultimate Elongation percent 300 minimum

Weight Increase percent 20 maximum Section 4.3.7

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TABLE 1

Requirements

CHEMICAL (Continued)

Fluid Resistance

24 hours at 50 ± 3°C (122 ± 5°F) in:

Deicing Fluid (SAE-AMS-1424)

Hydraulic Fluid (MIL-PRF-46170)

Diesel Fuel (A-A-52557)

5% Salt Solution (ASTM D 632)

Followed by tests for:

--- --- Section 4.3.7

Tensile Strength psi (MPa) 1800 (12.4) minimum Section 4.3.3

Ultimate Elongation percent 300 minimum

Weight Increase percent 10 maximum Section 4.3.7

Fluid Resistance

24 hours at 100 ± 3°C (212 ± 5°F) in:

Hydraulic Fluid (MIL-PRF-46170)

--- --- Section 4.3.7

Followed by tests for:

Tensile Strength psi (MPa) 1800 (12.4) minimum Section 4.3.3

Ultimate Elongation percent 300 minimum

Weight Increase percent 10 maximum Section 4.3.7