DL/T 1719-2017 "Technical Guidelines for the inspection of metal parts by portable Brinell hardness tester" stipulates the methods and technical requirements for the inspection of metal parts Hardness by portable Brinell hardness tester. This standard is applicable to the on-site brinell hardness testing of metal parts. The standard covers different types of portable Brinell hardness testers, including specifications for the use of C-type, magnetic type, hydraulic type and shear pin type hammering Brinell hardness testers. There are also detailed regulations on the inspection and calibrating of hardness gauges, and the calibration of standard Hardness blocks. This standard refers to relevant standards such as GB/T 231.1 to GB/T 231.4 to ensure the accuracy and Reliability of the inspection process.