scope:

The surface roughness of PM parts is an important characteristic in relation to factors such as their load-bearing, wear, sealing, sliding, adhesion, electrical contact, and lubricant retention properties.

As most roughness parameters are defined by measuring the microscopic peaks and valleys, the porosity in sintered powder metallurgy products will negatively influence this value.

This standard specifies two different standardized procedures for measuring the surface roughness of PM parts.

Method 1 uses a conical stylus and a Gaussian filter.

Method 2 uses a chisel (knife) edge stylus.

The guidelines and procedures outlined in ASME B46.1 shall be followed.

The values stated in SI units are to be regarded as standard. Values in inch-pound units are shown in parentheses and result from conversion in accordance with IEEE/ASTM Standard SI 10. They may be approximate and are only for information.

This standard may involve hazardous materials, operations and equipment. This standard does not purport to address all of the potential safety problems associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and to determine the applicability of regulatory limitations prior to use.