Verification of some technical problems in ISO 10113:2020 standard

The verification work of ISO 10113:2020 standard organized by National Steel Standardization Committee was introduced in detail. The accuracy and consistency of manual, semi-automatic and automatic test methods were mainly verified. In addition, a series of tests were carried out on whether the specimen had uneven deformation and whether it was necessary to avoid elastic strain. The verification test could make the related personnel more clearly and comprehensively understand some key provisions in the standard, which layed a good foundation for the next step to start the revision of GB/T 5027—2016 standard. At the same time, it was of great significance to promote the development of domestic the plastic strain ration (r value) test technology and the improvement of domestic equipment level.