This European Standard defines the measurement conditions for surface roughness parameters of metallic flat products, both uncoated (cold and hot rolled pickled steel) and coated with metallic coatings (e.g. zinc, aluminium, tin, chromium) [see subclause 3.1].
BS EN 10049:2005 history
2013BS EN 10049:2013 Measurement of roughness average $iR$ia and peak count $iR$iP$ic on metallic flat products
2006BS EN 10049:2005 Measurement of roughness average - Ra and peak count RPc on metallic flat products