This standard specifies the terms and definitions of ferrite grain size of cold-rolled low-carbon steel sheets, samples and preparation, measurement methods, test reports, etc. This standard is applicable to the determination of the ferrite grain size of cold-rolled low-carbon steel sheets with a carbon content less than 0.2%. The determination of the grain size of other metal materials whose grain shape is similar to this standard series of rating charts can also refer to this standard implement.
GB/T 4335-2013 Referenced Document
GB/T 13298 Inspection methods of microstructure for metals
GB/T 24177-2009 Standard test methods for characterizing duplex grain sizes
GB/T 6394-2002 Metal-methids for estimating the average grain size
GB/T 4335-2013 history
2013GB/T 4335-2013 Determination of ferrite grain size for cold rolled low carbon steel sheets