SAE J911_201704 Surface Texture, Roughness (Ra), Peak Count(Pc), and Mean Profile Spacing, (Rsm) Measurement of Metallic Coated and Uncoated Steel Sheet/Strip to be Formed and/or to be Painted

This SAE Recommended Practice describes a method for measuring roughness average (R\da) and Peak count (PC) of the surface of cold-rolled steel sheet. The method includes a system for equipment configuration, calibration, and procedures for determining average surface roughness, R\da (\gm or \gmin), and average peak count, PC (peaks per cm or peaks per inch) on cold-rolled steel sheet surfaces.