Buna nitrile buna is the most widely used o ring elastomer compound.
O ring materials.
Safety datasheets are available here.
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We offer o ring materials in custom and industry standard sizes.
Silicone and kalrez o ring materials are also widely used especially in high temperature applications.
O ring material family chemical compatibility temperature resistance and other properties all factor in to o ring material selection for an application.
Typical part number for a metric o ring id x cs material shore hardness 2x1n70 defines this o ring as 2mm id with 1mm cross section made from nitrile rubber which is 70sh.
O ring materials and types.
The information below along with consultation with the resources.
This popular o ring material family comparison shows basic rubber material family properties and performance plastic properties.
Each material page has a table with the available datasheets in pdf.
Metric o rings are usually defined by the internal dimension x the cross section.
Bs o rings are defined by a standard reference.
Below is a summary of the different commonly used o ring materials and types.