Material Specifications
Part 3

Other Specifications

Other standards exist for the purpose of classifying and specifying elastomers for specific applications or environments. Among these standards are the Society of Automotive Engineers (SAE), and many governmental agencies, including the military. SAE J120a “Rubber Rings for Automotive Applications” is a recommended practice for the design and specification for static and dynamic, 70 Shore A hardness seals. Materials are classified and may be marked as:

Class I— Oil-resistant service (yellow-colored stripe), or,
Class II— Gasoline-resistant service (red-colored stripe)

The following table highlights several key Aerospace Material Specifications (AMS), Military (MIL), and National Sanitation Foundation (NSF) standards. These standards cover a wide range of sealing applications and materials. Many of these standards require independent or accredited laboratory certification of the materials. In some instances, Underwriter’s Laboratory (UL) approval is required.

Specification	Duro	Polymer	Thermal (°F)	Description	ISC Cpd
AMS 3301	40	Silicone	–85 to 400°	General Purpose	S40
AMS 3302	50	Silicone	–85 to 400°	General Purpose	S50
AMS 3303	60	Silicone	–85 to 400°	General Purpose	S60
AMS 3304	70	Silicone	–85 to 400°	General Purpose	S70
AMS 3305	80	Silicone	–85 to 400°	General Purpose	S80
AMS 3307	70	Silicone		Low Compression Set, Non-Oil Resistant	S70
AMS 3326	60	Fluorosilicone		Fuel & Oil Resistant	F60
AMS 3357	70	Silicone		Lubricating Oil & Compression Set Resistant	S70
AMS 7257	75	Perfluoro		High Temperature	Z7257
AMS 7259	90	Fluorocarbon			V90
AMS 7268	70	Silicone		High Temperature & Low Compression Set	S310
AMS 7276	75	Fluorocarbon		High Temp. Fluid, Very Low Compression Set	V75
MIL-R-25988 Class 1, Grade 60	60	Fluorosilicone	–90 to 350°	Oil & Fuel Resistant	F60
MIL-R-25988 Class 1, Grade 70	70	Fluorosilicone	–90 to 350°	Oil & Fuel Resistant	F70
MIL-R-25988 Class 1, Grade 80	80	Fluorosilicone	–90 to 350°	Oil & Fuel Resistant	F80
MIL-R-83248 Type 1, Class 1	75	Fluorocarbon	–20 to 400°	High Temperature, Fluid & Compression Set	V75
MIL-R-83248 Type 1, Class 2	90	Fluorocarbon	–20 to 400°	High Temperature, Fluid & Compression Set	V90
ZZ-R-765 Class 2A & 2B Grade 40	40	Silicone	–80 to 437°	High Temperature & Low Compression Set	S40
ZZ-R-765 Class 1A & 1B Grade 50	50	Silicone	–103 to 437°	Low Temperature & Low Compression Set	S314
ZZ-R-765 Class 2A & 2B Grade 50	50	Silicone	–80 to 437°	High & Low Temp. & Low Compression Set	S50
ZZ-R-765 Class 2A & 2B Grade 60	60	Silicone	–80 to 437°	Low Temperature & Low Compression Set	S60
ZZ-R-765 Class 1A & 1B Grade 70	70	Silicone	–103 to 437°	Low Temperature & Low Compression Set	S313
ZZ-R-765 Class 2A & 2B Grade 70	70	Silicone	–80 to 437°	High Temperature & Low Compression Set	S70
ZZ-R-765 Class 1A & 1B Grade 80	80	Silicone	–103 to 437°	Low Temperature & Low Compression Set	S80
ZZ-R-765 Class 2A & 2B Grade 80	80	Silicone	–80 to 437°	High Temperature & Low Compression Set	S80

Certain semiconductor equipment manufacturers and wafer fabrication companies have begun to express an interest in developing relevant specifications for the semiconductor industry. A possible forum for this effort may come through the Standards Committee of the Semiconductor and Equipment Materials International (SEMI).

Back to Elastomers

PSP Inc. at www.pspglobal.com
© 1997-2008, Problem Solving Products, Inc.
Submit Your Industrial Website
Site Map 1 | Site Map 2 | Site Map 3
Privacy Statement | Terms of Use

Material Specifications Part 3

Other Specifications

Material Specifications
Part 3