ASTM OIL NO. 3 Resistant O-Rings and Seals

ASTM Oil No. 3, also known as SAE 30, is a common lubricating oil used in a variety of industrial applications, including automotive, industrial machinery, and agricultural equipment. It is composed of a blend of mineral oils, including paraffinic and naphthenic hydrocarbons, and is designed to provide lubrication and protection against rust and corrosion. Common uses for this oil include lubrication of hydraulic systems, power transmission systems, and engines.

When exposed to ASTM Oil No. 3, rubber seals and gaskets may experience a variety of failure modes. These can include swelling and softening of the rubber, leading to increased permeability, cracking and hardening of the rubber, and oxidation of the rubber surface. In addition, the oil can act as a solvent and cause the rubber to break down and lose its structural integrity. To protect against these types of failure, rubber seals should be made from materials that are compatible with the oil, such as fluorocarbon, nitrile, or polyurethane.