This standard specifies the main terms, definitions and English comparisons of heat treatment process materials such as heating medium, quenching cooling medium, chemical heat treatment penetration agent, heat treatment protective coating, etc. related to heat treatment. This standard is applicable to relevant standards and technical documents of heat treatment professional technology.
GB/T 8121-2012 history
2012GB/T 8121-2012 The terminology of technological materials for heat treatment
2002GB/T 8121-2002 The terminology of technological materials for heat treatment