This SAE Information report defines the thermal transport properties important in the assessment of heat management capability of brake lining, shoe, disc and drum materials. The report discusses thermal diffusivity, specific heat capacity, thermal conductivity and thermal expansion. Measurement techniques for the appropriate ASTM standards are identified. The thermal transport properties discussed are material sample properties, not the properties of entire components such as pad assemblies.
SAE J2581-2011 Referenced Document
ASTM C1114-06 Standard Test Method for Steady-State Thermal Transmission Properties by Means of the Thin-Heater Apparatus*， 2024-04-19 Update
ASTM E1225-09 Standard Test Method for Thermal Conductivity of Solids by Means of the Guarded-Comparative-Longitudinal Heat Flow Technique*， 2024-04-19 Update
ASTM E1269-05 Standard Test Method for Determining Specific Heat Capacity by Differential Scanning Calorimetry*， 2024-04-19 Update
ASTM E1269-11 Standard Test Method for Determining Specific Heat Capacity by Differential Scanning Calorimetry*， 2024-04-19 Update
ASTM E1461-07 Standard Test Method for Thermal Diffusivity by the Flash Method*， 2024-04-19 Update
ASTM E228-06 Standard Test Method for Linear Thermal Expansion of Solid Materials With a Push-Rod Dilatometer*， 2024-04-19 Update
ASTM E228-11 Standard Test Method for Linear Thermal Expansion of Solid Materials With a Push-Rod Dilatometer*， 2024-04-19 Update
ISO 6313:1980 Road vehicles; Brake linings; Effects of heat on dimensions and form of disc brake pads; Test procedure
JIS D 4416:1998 Automotive parts -- Disk brake pads -- Test procedure of thermal expansion
SAE J160-2001 Dimensional Stability of Friction Materials When Exposed to Elevated Temperatures
SAE J2581-2011 history
2017SAE J2581-2017 Thermal Transport Properties Germane to Friction Materials and Brakes
2011SAE J2581-2011 Thermal Transport Properties Germane to Friction Materials and Brakes
2003SAE J2581-2003 Thermal Transport Properties Germane to Friction Materials and Brakes