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AMS CE Elastomers Committee Standard

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Elastomer: Fluorosilicone Rubber (FVMQ) Fuel and Oil Resistant 65 – 75 Shore A Hardness For Products in Fuel Systems/Lubricating Oils
2022-11-01
WIP
AMS3331D
This specification covers a fluorosilicone (FVMQ) elastomer that can be used to manufacture product in the form of sheet, strip, tubing, extrusions, and molded shapes. This specification should not be used for molded rings, compression seals, O-ring cord, and molded in place gaskets for aeronautical and aerospace applications without complete consideration of the end use prior to the selection of this material.
Standard

Rings, Sealing, Butadiene-Acrylonitrile (Nbr) Rubber Synthetic Lubricant Resistant 67-75
2018-10-09
WIP
AMS7272H
This specification covers a butadiene-acrylonitrile (NBR) rubber in the form of molded rings. These rings have been used typically as sealing rings in contact with diester synthetic lubricants in service up 150 degrees C (302 degrees F), but usage is not limited to such applications. The cross-section of such rings is usually not over 0.275 inch (6.98 mm) in diameter or thickness.
Standard

Rubber, Ethylene-Propylene, Hydrazine Resistant
2021-07-21
WIP
AMSR83412B
This specification covers three types of rubber having good resistance to high and low temperature and hydrazine type propellants, but poor resistance to hydrocarbon oils or solvents. Hydrazines are hazardous chemicals. See Dangerous Properties of Industrial Materials; by N. Irving Sax.
Standard

Dynamic Seal Test Procedure
2023-10-25
WIP
AS6944/1
This SAE Aerospace Standard (AS) provides procedures for a standardized test that can be used to evaluate the dynamic performance requirements defined in some elastomer material standards of O-rings in rod glands per AS4716
Standard

Modernized Dynamic Cycling Test Fixture
2024-03-12
WIP
AS6958
This SAE Aerospace Standard (AS) defines a modernized dynamic cycling test fixture for dynamic cycling at high and low temperature and pressure.
Standard

Designing with Elastomers for use at Low Temperatures, Near or Below Glass Transition
2020-11-12
WIP
AIR1387E

To ensure success in design of elastomeric parts for use at low temperature, the design engineer must understand the peculiar properties of rubber materials at these temperatures.

There are no static applications of rubber. The Gaussian theory of rubber elasticity demonstrates that the elastic characteristic of rubber is due to approximately 15% internal energy and the balance, 85%, is entropy change. In other words, when an elastomer is deformed, the elastomer chain network is forced to rearrange its configuration thereby storing energy through entropy change. Thermodynamically, this means that rubber elasticity is time and temperature dependent (Reference 25).

The purpose of this report is to provide guidance on low temperature properties of rubber with the terminology, test methods, and mathematical models applicable to rubber, and to present some practical experience.

Standard

Fluorosilicone Rubber (FVMQ) Fuel and Oil Resistant 55 – 65 Durometer Type ‘A’ Hardness For Products in Fuel Systems / Lubrication Oils
2023-05-11
WIP
AMS3325H
This specification covers a fluorosilicone (FVMQ) elastomer that can be used to manufacture product in the form of sheet, strip, tubing, extrusions, and molded shapes. This specification should not be used for molded rings, compression seals, O ring cord, and molded in place gaskets for aeronautical and aerospace applications without complete consideration of the end use prior to the selection of this material.
Standard

Manufacturing Processing Requirements for Molded Elastomer Components Used in Aerospace Applications
2022-07-05
WIP
AS6414B
This specification is applicable to the processes that are used in the manufacture of aerospace elastomer parts utilizing materials conforming to AMS7XXX series specifications, user specifications, or print on a Purchase Order (PO) that calls out this document for aerospace applications. The elastomer parts are in the form of O-rings, plate seals and other compression seals.
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