Statement of Work (SOW).pdf

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First Article Testing of Rubber Formulas
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PNSY400T-5335
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This is a Statement of Work (SOW) for first article inspection and testing of eight rubber formulations for Portsmouth Naval Shipyard. The contractor must perform testing at an ISO 17025-accredited laboratory using referenced military performance specifications (MIL-PRF-15624H, MIL-PRF-19769C, MIL-PRF-32287A, and ZZ-R-768) and ASTM standards. Each of the eight formulas requires comprehensive initial property testing followed by testing after environmental aging (oven, light, low temperature, and/or liquid immersion) depending on the specific formulation requirements. Formula 1 (P-1), Formula 2 (P-3), and Formula 3 (10-D-35) require testing per MIL-PRF-15624H Class 3, including tensile strength, elongation, hardness, specific gravity, compression set, and liquid immersion properties. Formula 4 (80-C-36) requires MIL-PRF-15624H Class 1 testing with water immersion and extraction procedures. Formulas 5 and 6 (10-D-36 and P-31) require MIL-PRF-19769C testing including oil immersion and swell measurements. Formulas 7 and 8 (15-D-15 and 15-D-12) require specialized testing per MIL-PRF-32287A and ZZ-R-768, including hydraulic fluid aging, dynamic cycling, and mechanical property measurements using Yerzley oscillograph equipment.

The contract includes options for conducting up to two additional complete test cycles for each formula if formulations require modification. The contractor must provide detailed laboratory reports upon completion of testing for each formulation (CDRL A001), documenting all test results, sample remarks, and quality control issues. Portsmouth Naval Shipyard and the contractor shall coordinate on sampling requirements to ensure adequate material is provided for all testing. All testing must follow the referenced ASTM methods and military specifications precisely, including specific temperature conditions, exposure times, specimen dimensions, and deflection requirements. The work location is the contractor's ISO 17025-accredited laboratory, with scope of accreditation covering all test methods required by this SOW.

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SOW INSTRUCTIONS

Spec #: 20XX-XX Rev: - Page 1 of 14

STATEMENT OF WORK

1. SCOPE

1.1. Title: First Article Inspection of Portsmouth Naval Shipyard Rubber Formulas

1.2. Location of Work: Work to be performed at Contractor’s ISO 17025 accredited laboratory

1.3. Identification: PNSY First Article Testing of Rubber Formulas

2. REFERENCES

2.1. MIL-PRF-15624H; Performance Specification Gasket Material, Rubber, 50 Durometer

Hardness (Maximum)

2.2. MIL-PRF-19769C; Performance Specification Gaskets, Synthetic Rubber, Oil Resistance, Slide Valve (for 21-inch Submerged Torpedo Tubes)

2.3. MIL-PRF-32287A; Performance Specification Packing, Preformed, Petroleum Hydraulic Fluid Resistant

2.4. ZZ-R-768; Federal Specification Rubber for Mountings (Unbonded- Spool and Compression Types)

2.5. ASTM D412-16; Standard Test Methods for Vulcanized Rubber and Thermoplastic Elastomers – Tension

2.6. ASTM D2240-15; Standard Test Method for Rubber Property – Durometer Hardness

2.7. ASTM D792-20; Standard Test Methods for Density and Specific Gravity (Relative Density) of Plastics by Displacement

2.8. ASTM D395-18; Standard Test Methods for Rubber Property – Compression Set

2.9. ASTM D573-04; Standard Test Method for Rubber – Deterioration in an Air Oven

2.10. ASTM D471-16a; Standard Test Method for Rubber Property – Effect of Liquids

2.11. ASTM D2565-23; Standard Practice for Xenon-Arc Exposure of Plastics Intended for Outdoor Applications

2.12. ASTM D624-00; Standard Test Method for Tear Strength of Conventional Vulcanized Rubber and Thermoplastic Elastomers

2.13. ASTM D1229-03; Standard Test Method for Rubber Property – Compression Set at Low Temperatures

2.14. ASTM D1414-22; Standard Test Methods for Rubber O-Rings

2.15. ASTM D1329-16; Standard Test Method for Evaluating Rubber Property – Retraction at Lower Temperatures (TR Test)

Rev: - Page 2 of 14

2.16. Federal Test Method Standard No. 601; Rubber: Sampling and Testing

3. REQUIREMENTS

3.1. The testing laboratory shall be certified/accredited to ISO 17025 by an organization certified/accredited to ISO 17011.

3.1.1. The Scope of Certification/Accreditation for the laboratory shall have all test methods required of this statement of work, as applicable.

3.2. The testing laboratory shall provide first article testing to 8 rubber formulations based upon various military performance specifications following the referenced ASTMs and additional testing requirements per specifications.

3.2.1. Portsmouth Naval Shipyard and the contracted laboratory shall discuss sampling requirements so that Portsmouth Naval Shipyard can provide adequate material to perform all testing herein.

3.3. Each formulation shall be fully first article tested once by the testing laboratory. After award, the testing laboratory and Portsmouth Naval Shipyard shall discuss what and how many different types of samples the testing laboratory will need.

3.4. The contract shall contain options that include fully testing each additional formula 2 more times, if necessary. This is to allow for Portsmouth Naval Shipyard to make changes if a formula comes back with a failing report.

3.5. Formula 1: P-1. Testing to MIL-PRF-15624H Class 3 (reference 2.1)

3.5.1. Initial Properties testing:

3.5.1.1. Tensile Strength per ASTM D412-16 (reference 2.5) Method A.

3.5.1.2. Ultimate Elongation per ASTM D412-16 (reference 2.5) Method A.

3.5.1.3. Tensile Strength at 100% elongation per ASTM D412-16 (reference 2.5) Method A.

3.5.1.4. Hardness, Shore A, per ASTM D2240-15 (reference 2.6).

3.5.1.5. Specific Gravity per ASTM D792-20 (reference 2.7).

3.5.2. Properties after Oven Aging per ASTM D573-04 (reference 2.9):

3.5.2.1. Samples are required to be aged for 46 hrs. ± 15 minutes at 194°F±2°F.

3.5.2.2. Tensile Strength per ASTM D412-16 (reference 2.5) Method A.

3.5.2.3. Ultimate Elongation per ASTM D412-16 (reference 2.5) Method A.

Rev: - Page 3 of 14

3.5.2.4. Tensile Strength at 100% elongation per ASTM D412-16 (reference 2.5) Method A.

3.5.2.5. Hardness, Shore A, per ASTM D2240-15 (reference 2.6).

3.5.2.6. Compression Set per ASTM D395-18 (reference 2.8) Method B.

3.5.2.6.1. Specimens are required to be clamped at 40% deflection.

3.5.3. Properties after Light Aging per ASTM D2565-23 (reference 2.11)

3.5.3.1. Specimens are to be 0.080 in. ± 0.010 in. thick. Black panel temperature shall be 113°F±5°F and the exposure time shall be 100 hrs. ± 30 minutes.

3.5.3.2. Tensile Strength per ASTM D412-16 (reference 2.5) Method A.

3.5.3.3. Ultimate Elongation per ASTM D412-16 (reference 2.5) Method A.

3.5.4. Properties after Low Temperature Aging:

3.5.4.1. Specimens shall be low temperature flexibility tested as follows:

specimens shall be die-cut to provide edges that are sharp, free of cracks, free of tears, and without abraded particles. Steel die shall be 0.5 inch by 6 inches. Specimens shall not exceed 0.080-inch thickness and shall be uniform to within ±0.010 inch. The specimens and a 1-inch diameter mandrel shall be exposed for 6 hours at -20±4 °F in a cold chamber.

Without removing the specimens from the cold chamber, each cooled specimen shall be firmly held at one point on the 1-inch diameter mandrel and, using finger pressure, the specimen shall be forced around the mandrel within 5±1 seconds so that a 180-degree contact is achieved between the specimen and mandrel. The specimen shall not exhibit cracks, tears, or surface separation from being forced around the mandrel.

3.5.5. Properties after Liquid Immersion:

3.5.5.1. Volume change after immersion in Reference Fuel B per ASTM D471-16a (reference 2.10).

3.5.5.1.1. Immersion in Reference Fuel B for 168 hrs ± 2 hrs at 75°F±9°F.

3.6. Formula 2: P-3. Testing to MIL-PRF-15624H Class 3 (reference 2.1)

3.6.1. Initial Properties testing:

3.6.1.1. Tensile Strength per ASTM D412-16 (reference 2.5) Method A.

3.6.1.2. Ultimate Elongation per ASTM D412-16 (reference 2.5) Method A.

Rev: - Page 4 of 14

3.6.1.3. Tensile Strength at 100% elongation per ASTM D412-16 (reference 2.5)

3.6.1.4. Hardness, Shore A, per ASTM D2240-15 (reference 2.6).

3.6.1.5. Specific Gravity per ASTM D792-20 (reference 2.7).

3.6.2. Properties after Oven Aging per ASTM D573-04 (reference 2.9):

3.6.2.1. Samples are required to be aged for 46 hrs. ± 15 minutes at 194°F±2°F.

3.6.2.2. Tensile Strength per ASTM D412-16 (reference 2.5) Method A.

3.6.2.3. Ultimate Elongation per ASTM D412-16 (reference 2.5) Method A.

3.6.2.4. Tensile Strength at 100% elongation per ASTM D412-16 (reference 2.5) Method A.

3.6.2.5. Hardness, Shore A, per ASTM D2240-15 (reference 2.6).

3.6.2.6. Compression Set per ASTM D395-18 (reference 2.8) Method B.

3.6.2.6.1. Specimens are required to be clamped at 40% deflection.

3.6.3. Properties after Light Aging per ASTM D2565-23 (reference 2.11)

3.6.3.1. Specimens are to be 0.080 in. ± 0.010 in. thick. Black panel temperature shall be 113°F±5°F and the exposure time shall be 100 hrs. ± 30 minutes.

3.6.3.2. Tensile Strength per ASTM D412-16 (reference 2.5) Method A.

3.6.3.3. Ultimate Elongation per ASTM D412-16 (reference 2.5) Method A.

3.6.4. Properties after Low Temperature Aging:

3.6.4.1. Specimens shall be low temperature flexibility tested as follows:

specimens shall be die-cut to provide edges that are sharp, free of cracks, free of tears, and without abraded particles. Steel die shall be 0.5 inch by 6 inches. Specimens shall not exceed 0.080-inch thickness and shall be uniform to within ±0.010 inch. The specimens and a 1-inch diameter mandrel shall be exposed for 6 hours at -20±4 °F in a cold chamber.

Without removing the specimens from the cold chamber, each cooled specimen shall be firmly held at one point on the 1-inch diameter mandrel and, using finger pressure, the specimen shall be forced around the mandrel within 5±1 seconds so that a 180-degree contact is achieved between the specimen and mandrel. The specimen shall not exhibit cracks, tears, or surface separation from being forced around the mandrel.

Rev: - Page 5 of 14

3.6.5. Properties after Liquid Immersion:

3.6.5.1. Volume change after immersion in Reference Fuel B per ASTM D471-16a (reference 2.10).

3.6.5.1.1. Immersion in Reference Fuel B for 168 hrs ± 2 hrs at 75°F±9°F.

3.7. Formula 3: 10-D-35. Testing to MIL-PRF-15624H Class 3 (reference 2.1)

3.7.1. Initial Properties testing:

3.7.1.1. Tensile Strength per ASTM D412-16 (reference 2.5) Method A.

3.7.1.2. Ultimate Elongation per ASTM D412-16 (reference 2.5) Method A.

3.7.1.3. Tensile Strength at 100% elongation per ASTM D412-16 (reference 2.5) Method A.

3.7.1.4. Hardness, Shore A, per ASTM D2240-15 (reference 2.6).

3.7.1.5. Specific Gravity per ASTM D792-20 (reference 2.7).

3.7.2. Properties after Oven Aging per ASTM D573-04 (reference 2.9):

3.7.2.1. Samples are required to be aged for 46 hrs. ± 15 minutes at 194°F±2°F.

3.7.2.2. Tensile Strength per ASTM D412-16 (reference 2.5) Method A.

3.7.2.3. Ultimate Elongation per ASTM D412-16 (reference 2.5) Method A.

3.7.2.4. Tensile Strength at 100% elongation per ASTM D412-16 (reference 2.5) Method A.

3.7.2.5. Hardness, Shore A, per ASTM D2240-15 (reference 2.6).

3.7.2.6. Compression Set per ASTM D395-18 (reference 2.8) Method B.

3.7.2.6.1. Specimens are required to be clamped at 40% deflection.

3.7.3. Properties after Light Aging per ASTM D2565-23 (reference 2.11)

3.7.3.1. Specimens are to be 0.080 in. ± 0.010 in. thick. Black panel temperature shall be 113°F±5°F and the exposure time shall be 100 hrs. ± 30 minutes.

3.7.3.2. Tensile Strength per ASTM D412-16 (reference 2.5) Method A.

3.7.3.3. Ultimate Elongation per ASTM D412-16 (reference 2.5) Method A.

Rev: - Page 6 of 14

3.7.4. Properties after Low Temperature Aging:

3.7.4.1. Specimens shall be low temperature flexibility tested as follows:

specimens shall be die-cut to provide edges that are sharp, free of cracks, free of tears, and without abraded particles. Steel die shall be 0.5 inch by 6 inches. Specimens shall not exceed 0.080-inch thickness and shall be uniform to within ±0.010 inch. The specimens and a 1-inch diameter mandrel shall be exposed for 6 hours at -20±4 °F in a cold chamber.

Without removing the specimens from the cold chamber, each cooled specimen shall be firmly held at one point on the 1-inch diameter mandrel and, using finger pressure, the specimen shall be forced around the mandrel within 5±1 seconds so that a 180-degree contact is achieved between the specimen and mandrel. The specimen shall not exhibit cracks, tears, or surface separation from being forced around the mandrel.

3.7.5. Properties after Liquid Immersion:

3.7.5.1. Volume change after immersion in Reference Fuel B per ASTM D471-16a (reference 2.10).

3.7.5.1.1. Immersion in Reference Fuel B for 168 hrs ± 2 hrs at 75°F±9°F.

3.8. Formula 4: 80-C-36. Testing to MIL-PRF-15624H Class 1 (reference 2.1)

3.8.1. Initial Properties testing:

3.8.1.1. Tensile Strength per ASTM D412-16 (reference 2.5) Method A.

3.8.1.2. Ultimate Elongation per ASTM D412-16 (reference 2.5) Method A.

3.8.1.3. Tensile Strength at 100% elongation per ASTM D412-16 (reference 2.5) Method A.

3.8.1.4. Hardness, Shore A, per ASTM D2240-15 (reference 2.6).

3.8.1.5. Specific Gravity per ASTM D792-20 (reference 2.7).

3.8.2. Properties after Oven Aging per ASTM D573-04 (reference 2.9):

3.8.2.1. Samples are required to be aged for 46 hrs. ± 15 minutes at 194°F±2°F.

3.8.2.2. Tensile Strength per ASTM D412-16 (reference 2.5) Method A.

3.8.2.3. Ultimate Elongation per ASTM D412-16 (reference 2.5) Method A.

3.8.2.4. Tensile Strength at 100% elongation per ASTM D412-16 (reference 2.5)

Rev: - Page 7 of 14

3.8.2.5. Hardness, Shore A, per ASTM D2240-15 (reference 2.6).

3.8.2.6. Compression Set per ASTM D395-18 (reference 2.8) Method B.

3.8.2.6.1. Specimens are required to be clamped at 40% deflection.

3.8.3. Properties after Light Aging per ASTM D2565-23 (reference 2.11)

3.8.3.1. Specimens are to be 0.080 in. ± 0.010 in. thick. Black panel temperature shall be 113°F±5°F and the exposure time shall be 100 hrs. ± 30 minutes.

3.8.3.2. Tensile Strength per ASTM D412-16 (reference 2.5) Method A.

3.8.3.3. Ultimate Elongation per ASTM D412-16 (reference 2.5) Method A.

3.8.4. Properties after Low Temperature Aging:

3.8.4.1. Specimens shall be low temperature flexibility tested as follows:

specimens shall be die-cut to provide edges that are sharp, free of cracks, free of tears, and without abraded particles. Steel die shall be 0.5 inch by 6 inches. Specimens shall not exceed 0.080-inch thickness and shall be uniform to within ±0.010 inch. The specimens and a 1-inch diameter mandrel shall be exposed for 6 hours at -20±4 °F in a cold chamber.

Without removing the specimens from the cold chamber, each cooled specimen shall be firmly held at one point on the 1-inch diameter mandrel and, using finger pressure, the specimen shall be forced around the mandrel within 5±1 seconds so that a 180-degree contact is achieved between the specimen and mandrel. The specimen shall not exhibit cracks, tears, or surface separation from being forced around the mandrel.

3.8.5. Properties after Liquid Immersion:

3.8.5.1. Volume change after immersion in distilled water per ASTM D471-16a (reference 2.10).

3.8.5.1.1. Immersion in distilled water for 24 hrs. ± 15 minutes.

3.8.5.2. Extraction per ASTM D471-16a (reference 2.10).

3.8.5.2.1. In distilled water at boiling point for 1 hour.

3.8.5.2.2. ASTM D471-16a procedure “Procedure for Determining Mass of Soluble Matter Extracted by Liquid” shall be used.

Determine the percent extract by evaporating the water after specimen removal and weighing the non-volatile residue.

3.8.5.3. Volume Change after immersion in IRM 901 per ASTM D471-16a (reference 2.10).

Rev: - Page 8 of 14

3.8.5.3.1. Immersion in IRM 901 for 70 hrs. ± 30 minutes at 212°F±2°F.

3.9. Formula 5: 10-D-36. Testing to MIL-PRF-19769C (reference 2.2)

3.9.1. Initial Properties testing:

3.9.1.1. Tensile Strength per ASTM D412-16 (reference 2.5) Method A.

3.9.1.2. Ultimate Elongation per ASTM D412-16 (reference 2.5) Method A.

3.9.1.3. Tensile Strength at 100% elongation per ASTM D412-16 (reference 2.5) Method A.

3.9.1.4. Hardness, Shore A, per ASTM D2240-15 (reference 2.6).

3.9.1.5. Specific Gravity per ASTM D792-20 (reference 2.7).

3.9.2. Properties after Oven Aging:

3.9.2.1. Samples are required to be aged in a circulating air oven for 46 hrs. at 194°F±2°F.

3.9.2.1.1. The aged samples shall be tested not less than 20 hours nor more than 48 hours after removal from the oven.

3.9.2.2. Tensile Strength per ASTM D412-16 (reference 2.5) Method A.

3.9.2.3. Ultimate Elongation per ASTM D412-16 (reference 2.5) Method A.

3.9.2.4. Tensile Strength at 100% elongation per ASTM D412-16 (reference 2.5) Method A.

3.9.2.5. Hardness, Shore A, per ASTM D2240-15 (reference 2.6).

3.9.2.6. Compression Set per ASTM D395-18 (reference 2.8) Method B.

3.9.2.6.1. Specimens are required to be clamped at 25% deflection.

3.9.3. Properties after Oil Immersion:

3.9.3.1. Specimens for testing following oil immersion shall be immersed for 94 hours at 158±3.6 °F in a petroleum-base oil having the same viscosity, aniline point, and flash point as the No. 3 oil of Method 6001 of FED-

STD-601.

3.9.3.2. Swell per Method 6231 of FED-STD-601 (reference 2.14).

3.9.3.2.1. Swell shall be based on the average volume change of 3 specimens.

Rev: - Page 9 of 14

3.9.3.3. Tensile Strength and Tensile Stress per ASTM D412-16 (reference 2.5)

3.9.3.3.1. Specimens shall be tested within 60 minutes from the time of removal from the immersion fluid. Tensile strength and tensile stress shall be determined on the basis of the swollen area as described in Method 6111 of FED-STD-601 (reference 2.14).

3.9.3.4. Ultimate Elongation per ASTM D412-16 (reference 2.5) Method A.

3.9.3.4.1. Specimens shall be tested within 60 minutes from the time of removal from the immersion fluid.

3.10. Formula 6: P-31. Testing to MIL-PRF-19769C (reference 2.2)

3.10.1. Initial Properties testing:

3.10.1.1. Tensile Strength per ASTM D412-16 (reference 2.5) Method A.

3.10.1.2. Ultimate Elongation per ASTM D412-16 (reference 2.5) Method A.

3.10.1.3. Tensile Strength at 100% elongation per ASTM D412-16 (reference 2.5) Method A.

3.10.1.4. Hardness, Shore A, per ASTM D2240-15 (reference 2.6).

3.10.1.5. Specific Gravity per ASTM D792-20 (reference 2.7).

3.10.2. Properties after Oven Aging:

3.10.2.1. Samples are required to be aged in a circulating air oven for 46 hrs. at 194°F±2°F.

3.10.2.1.1. The aged samples shall be tested not less than 20 hours nor more than 48 hours after removal from the oven.

3.10.2.2. Tensile Strength per ASTM D412-16 (reference 2.5) Method A.

3.10.2.3. Ultimate Elongation per ASTM D412-16 (reference 2.5) Method A.

3.10.2.4. Tensile Strength at 100% elongation per ASTM D412-16 (reference 2.5) Method A.

3.10.2.5. Hardness, Shore A, per ASTM D2240-15 (reference 2.6).

3.10.2.6. Compression Set per ASTM D395-18 (reference 2.8) Method B.

3.10.2.6.1. Specimens are required to be clamped at 25% deflection.

Rev: - Page 10 of 14

3.10.3. Properties after Oil Immersion:

3.10.3.1. Specimens for testing following oil immersion shall be immersed for 94 hours at 158±3.6 °F in a petroleum-base oil having the same viscosity, aniline point, and flash point as the No. 3 oil of Method 6001 of FED-

STD-601.

3.10.3.2. Swell per Method 6231 of FED-STD-601 (reference 2.14).

3.10.3.2.1. Swell shall be based on the average volume change of 3 specimens.

3.10.3.3. Tensile Strength and Tensile Stress per ASTM D412-16 (reference 2.5) Method A.

3.10.3.3.1. Specimens shall be tested within 60 minutes from the time of removal from the immersion fluid. Tensile strength and tensile stress shall be determined on the basis of the swollen area as described in Method 6111 of FED-STD-601 (reference 2.14).

3.10.3.4. Ultimate Elongation per ASTM D412-16 (reference 2.5) Method A.

3.10.3.4.1. Specimens shall be tested within 60 minutes from the time of removal from the immersion fluid.

3.11. Formula 7: 15-D-15. Testing to MIL-PRF-32287A (reference 2.3)

3.11.1. Initial Properties testing:

3.11.1.1. Tensile Strength per ASTM D1414-22 (reference 2.14).

3.11.1.2. Ultimate Elongation per ASTM D1414-22 (reference 2.14).

3.11.1.3. Tensile Strength at 100% elongation per ASTM D1414-22 (reference 2.14).

3.11.1.4. Hardness, Shore A, per ASTM D2240-15 (reference 2.6).

3.11.1.5. Specific Gravity per ASTM D792-20 (reference 2.7).

3.11.1.6. Temperature Retraction, TR-10, 50% elongation and 10% return, per ASTM D1329-16 (reference 2.13).

3.11.1.7. Corrosion Adhesion

3.11.1.7.1. Corrosion adhesion is performed to section 4.5.3 of MIL-PRF- 32287A (reference 2.3).

3.11.1.8. Dynamic Cycling

Rev: - Page 11 of 14

3.11.1.8.1. Dynamic cycling is performed to section 4.6 of MIL-PRF- 32287A (reference 2.3).

3.11.2. Properties after Oven Aging per ASTM D471-16a (reference 2.10) in MIL-PRF- 87257 Hydraulic Fluid:

3.11.2.1. Samples are required to be aged for 70 hrs. at 275°F±5°F. During aging the O-rings shall be suspended in the oil by a glass or nichrome wire rack in such a manner that the O-rings will not come in contact with any part of the container. The harness discs shall be placed loosely in the jars.

Immediately after the aging period and before physical property determinations, the O-rings and hardness discs shall be cooled in new fluid for a period of not less than 30 minutes at 77±5 °F.

3.11.2.2. Tensile Strength Decrease per ASTM D1414-22 (reference 2.14).

3.11.2.3. Ultimate Elongation Decrease per ASTM D1414-22 (reference 2.14).

3.11.2.4. Hardness, Shore A, per ASTM D2240-15 (reference 2.6).

3.11.2.5. Volume Change.

3.11.2.6. Compression Set per ASTM D395-18 (reference 2.8) Method B.

3.11.2.6.1. Specimens are required to be clamped at 25% deflection.

3.11.2.7. Temperature Retraction, TR-10, 50% elongation and 10% return, per ASTM D1329-16 (reference 2.13).

3.11.3. Properties after Oven Aging per ASTM D471-16a (reference 2.10) in MIL-PRF- 83282 Hydraulic Fluid:

3.11.3.1. Samples are required to be aged for 70 hrs. at 275°F±5°F. During aging the O-rings shall be suspended in the oil by a glass or nichrome wire rack in such a manner that the O-rings will not come in contact with any part of the container. The harness discs shall be placed loosely in the jars.

Immediately after the aging period and before physical property determinations, the O-rings and hardness discs shall be cooled in new fluid for a period of not less than 30 minutes at 77±5 °F.

3.11.3.2. Tensile Strength Decrease per ASTM D1414-22 (reference 2.14).

3.11.3.3. Ultimate Elongation Decrease per ASTM D1414-22 (reference 2.14).

3.11.3.4. Hardness, Shore A, per ASTM D2240-15 (reference 2.6).

3.11.3.5. Volume Change.

Rev: - Page 12 of 14

3.11.3.6. Compression Set per ASTM D395-18 (reference 2.8) Method B.

3.11.3.6.1. Specimens are required to be clamped at 25% deflection.

3.11.3.7. Temperature Retraction, TR-10, 50% elongation and 10% return, per ASTM D1329-16 (reference 2.13).

3.12. Formula 8: 15-D-12. Testing to ZZ-R-768C (reference 2.4)

3.12.1. Initial Properties testing:

3.12.1.1. Tensile Strength per ASTM D412-16 (reference 2.5) Method A using Die C specimens.

3.12.1.2. Ultimate Elongation per ASTM D412-16 (reference 2.5) Method A using Die C specimens.

3.12.1.3. Tensile Strength at 100% elongation per ASTM D412-16 (reference 2.5) Method A using Die C specimens.

3.12.1.4. Hardness, Shore A, per ASTM D2240-15 (reference 2.6).

3.12.1.4.1. 3 second readings shall be taken on a 0.500±0.010 inch thick specimen.

3.12.1.5. Specific Gravity per ASTM D792-20 (reference 2.7).

3.12.1.6. Tear Resistance per ASTM D624-00 (reference 2.12).

3.12.1.6.1. Utilize Die C specimens that are 0.800±0.010 inch thick.

3.12.2. Properties after Oven Aging per ASTM D573-04 (reference 2.9):

3.12.2.1. Samples are required to be aged in a circulating air oven for 96.5 hrs. at 194°F±2°F.

3.12.2.1.1. The aged samples shall be tested not less than 20 hours nor more than 48 hours after removal from the oven.

3.12.2.2. Tensile Strength per ASTM D412-16 (reference 2.5) Method A using Die C specimens.

3.12.2.3. Ultimate Elongation ASTM D412-16 (reference 2.5) Method A using Die C specimens.

3.12.2.4. Tensile Stress at 100% elongation per ASTM D412-16 (reference 2.5) Method A using Die C specimens.

3.12.2.5. Compression Set per ASTM D395-18 (reference 2.8) Method B.

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3.12.2.5.1. Specimens are required to be clamped at 40% deflection.

3.12.2.6. Temperature Retraction, TR-10, 50% elongation and 10% return, per ASTM D1329-16 (reference 2.13).

3.12.3. Properties after Oil Immersion:

3.12.3.1. Volume Change per ASTM D471-16a (reference 2.10)

3.12.4. Properties at 73.4°F±2°F:

3.12.4.1. Deformation, resilience, frequency, and absorbed energy shall be determined using a Yerzley oscillograph following the procedure for measurements in compression detailed in ASTM D945. The mechanical properties shall be determined at both 73.4±2.0 °F and 32.0±2.0 °F after conditioning the specimens for 2 days at room temperature plus 4.0±0.1 hours at each test temperature.

3.12.4.2. Deformation:

3.12.4.2.1. Deformation is the percent deflection of the specimen caused by five standard weights, calculated as 1 inch equals 20 percent.

3.12.4.3. Resilience:

3.12.4.3.1. The resilience shall be calculated by dividing the vertical distance of the upstroke of the first cycle (rebound) by the vertical distance of the down-stroke of the first cycle from the starting point and multiplying by 100.

3.12.4.4. Frequency:

3.12.4.4.1. The frequency shall be determined by counting a convenient number of cycles, measuring in inches the horizontal distance along the center axis of the set of oscillations covered by this number of cycles, and dividing the number of cycles by the measured distance.

3.12.4.5. Absorbed Energy:

3.12.4.5.1. The absorbed energy shall be calculated by multiplying the vertical distance in inches of the down-stroke of the first cycle by the constant 20. (The constant 20 equals the energy of 5 weights corresponding to one-inch vertical distance on the chart per cubic inch of material.)

3.12.5. Properties at 32°F±2°F:

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3.12.5.1. Deformation, resilience, frequency, and absorbed energy shall be determined using a Yerzley oscillograph following the procedure for measurements in compression detailed in ASTM D945. The mechanical properties shall be determined at both 73.4±2.0 °F and 32.0±2.0 °F after conditioning the specimens for 2 days at room temperature plus 4.0±0.1 hours at each test temperature.

3.12.5.2. Deformation:

3.12.5.2.1. Deformation is the percent deflection of the specimen caused by five standard weights, calculated as 1 inch equals 20 percent.

3.12.5.3. Resilience:

3.12.5.3.1. The resilience shall be calculated by dividing the vertical distance of the upstroke of the first cycle (rebound) by the vertical distance of the down-stroke of the first cycle from the starting point and multiplying by 100.

3.12.5.4. Frequency:

3.12.5.4.1. The frequency shall be determined by counting a convenient number of cycles, measuring in inches the horizontal distance along the center axis of the set of oscillations covered by this number of cycles, and dividing the number of cycles by the measured distance.

3.12.5.5. Absorbed Energy:

3.12.5.5.1. The absorbed energy shall be calculated by multiplying the vertical distance in inches of the down-stroke of the first cycle by the constant 20. (The constant 20 equals the energy of 5 weights corresponding to one-inch vertical distance on the chart per cubic inch of material.)

3.12.5.6. Cold Compression Set per ASTM D1229-03 (reference 2.13):

3.12.5.6.1. Specimens clamped to 40% deflection and conditioned for 96±½ hours at 32±2 °F and allowed to recover for 30 minutes at the conditioning temperature before measuring thickness.

4. RESPONSIBILITITES

4.1. The Contractor shall provide upon completion of testing for each formulation, a detailed laboratory report capturing the results of all testing performed and any additional sample remarks, quality control issues. (CDRL A001)

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