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SAE J160

2013 Edition, February 2013

Complete Document

(R) Swell, Growth, and Dimensional Stability of Friction Materials and Noise Insulators when Exposed to Elevated Temperatures

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Product Details:

  • Revision: 2013 Edition, February 2013
  • Published Date: February 2013
  • Status: Active, Most Current
  • Document Language: English
  • Published By: SAE International (SAE)
  • Page Count: 10
  • ANSI Approved: No
  • DoD Adopted: Yes

Description / Abstract:

This performance standard specifies a universal method of measuring the dimensional change of friction materials to determine the effects of temperature. The test applies to both, disc and drum type linings commonly used in hydraulic and air brake systems for automotive or commercial vehicle applications.

This standard describes two main test procedures. Method A, where the friction material is in contact with a heated surface to simulate the heat input to the pad that occurs during actual usage. Method B uses an oven to heat the freestanding material and is an approximate procedure requiring less instrumentation. Method A is recommended for disc brake pad assemblies, noise insulators, or flat coupons; while Method B is recommended for curved drum brake linings.


This test procedure establishes common laboratory test methods to determine the dimensional stability of friction materials when exposed to elevated temperatures. The intent of this procedure is to characterize swell and growth.
AIA/NAS Aerospace Standards